docs/low_resolution

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1 Low Resolution SCC L1 Products
2
3 Document version: 1.0alpha
4
5 1. .. rubric:: Introduction
6 :name: introduction
7
8 The Single Calculus Chain (SCC) is the standard EARLINET tool to perform
9 automatic and quality nchecked analysis of raw lidar data. It is
10 composed by three different modules:
11
12 - ELPP (EARLINET Lidar Pre-Processor)
13 - ELDA (EARLINET Lidar Data Analizer)
14 - ELDEC (EARLINET Lidar DEpolarization Calibrator)
15
16 Whenever an input file containing raw lidar data has been submitted to
17 the SCC ELPP is automatically ran on it. The ELPP module pre-processes
18 the raw data performing all the corrections and data handling needed
19 before the optical retrieval algorithms can be applied by ELDA module.
20 The ELPP output files contain pre-processed range corrected signals
21 corrected for instrumental effects as well as atmospheric molecular
22 parameters calculated from standard model or radiosounding. Typically,
23 the vertical and temporal resolutions of the pre-processed signals
24 included in these files is lower than the raw vertical and temporal
25 resolution as in general time/vertical integration is performed by ELPP
26 to increase the SNR and allow the calculation of optical products with a
27 reduced uncertainties. As a consequence the ELPP output files are called
28 Low Resolution SCC L1 Products. Another SCC module (HiRELPP – High
29 Resolution EARLINET Lidar Pre-Processor) currently under development
30 will produce High Resolution SCC L1 Products in which both time and
31 vertical resolution are kept as higher as possible.
32
33 This document provides a detailed description about the structure and
34 the format of Low Resolution SCC L1 Product as produced by the SCC v4.0.
35
36 1. .. rubric:: Low Resolution SCC L1 Product: File format
37 :name: low-resolution-scc-l1-product-file-format
38
39 The Low Resolution SCC L1 Products are files in Network Common Data Form
40 (NetCDF) which is a well known self-describing, machine-independent data
41 format that support the creation, access, and sharing of array-oriented
42 scientific data. For more information about NetCDF format:
43 http://www.unidata.ucar.edu/software/netcdf/.
44
45 The NetCDF is a binary format that allows the definition of
46 multi-dimensional variables of several types (integers, double,
47 character, etc). For each variable it is possible to define one or more
48 attributes where to specify variable properties like units, long name,
49 description, etc.
50
51 It is possible to define global attributes which are not related to a
52 specific variable but to the whole file.
53
54 A NetCDF file is composed by four different section:
55
56 - dimensions
57
58 this section contains all the dimensions used in the definition of
59 all the variables included in the NetCDF file
60
61 - variables
62
63 this section contains all the variables stored in the NetCDF file.
64 Each variable is defined as a multi-dimensional array of a specific
65 type and with all the dimensions defined in the dimensions section
66
67 global attributes
68
69 this section lists all the attributes referring to the whole file. As
70 the variable the attributes (global or the one attached to a specific
71 variable) can be of different type
72
73 - data
74
75 in this section the data contained in each variable defined in
76 variable section is stored. Attribute values (both global or related
77 to a specific variable) are not reported in data section but directly
78 in variable or global attribute sections.
79
80 Each Low Resolution SCC L1 Product correspond to a single emission
81 wavelength. For example it is possible to find in the same file the
82 elastic and the Raman channel pre-processed time-series corresponding to
83 the same emission wavelength (but to a different detection wavelengths)
84 but not two elastic time-series referring to different emission
85 wavelengths.
86
87 1.
88
89 1. .. rubric:: Low Resolution SCC L1 Product Format: dimensions
90 :name: low-resolution-scc-l1-product-format-dimensions
91
92 The following dimensions are defined in the Low Resolution SCC L1
93 Product:
94
95 - time
96 - points
97 - channels
98 - scan\_angles
99
100 The dimension *time* specifies the number of RCS (for each channel)
101 composing all the pre-processed time-series reported in the file.
102
103 The dimension *points* represents the number of rangebins characterizing
104 the pre-processed RCS. In case RCSs corresponding to different channels
105 are characterized by different rangebins the dimension time is to the
106 the maximum value of rangebins.
107
108 The dimension *channels* indicates the number channels at which the RCS
109 time-series included in the file refer to.
110
111 The dimension *scan\_angles* takes into account how many zenith scan
112 angles have been used to measure the RCS time-series reported into the
113 file
114
115 1.
116
117 1. .. rubric:: Low Resolution SCC L1 Product Format: variables
118 :name: low-resolution-scc-l1-product-format-variables
119
120 In this section all the possible Low Resolution SCC L1 Product variables
121 are reported. There are some variables that are mandatory and have to be
122 present in all the Low Resolution SCC L1 Product files while there are
123 others that have to be present only in specific cases.
124
125 Technical Variables
126
127 1. Variable name: *altitude\_resolution*
128
129 Type: *double*
130
131 Number of dimensions: 1
132
133 Dimensions: *scan\_angles*
134
135 Location: Included in all the Low Resolution SCC L1 Product files
136
137 NetCDF definition: *double altitude\_resolution(scan\_angles) *
138
139 Description: this variable describes the altitude resolution
140 corresponding to the RCS time-series reported in the file. It is needed
141 to compute the vertical scale of the RCS corresponding to each scan
142 angle which should be calculated as it follow:
143
144 where *z* is the altitude, ** is the scan angle value and *h* is the
145 value reported by *altitude\_resolution* variable.
146
147 1. Variable name: *range\_resolution*
148
149 Type: *double*
150
151 Number of dimensions: 1
152
153 Dimensions: *scan\_angles*
154
155 Location: Included in all the Low Resolution SCC L1 Product files
156
157 NetCDF definition: *double range\_resolution(scan\_angles) *
158
159 Description: this variable describes the range resolution corresponding
160 to the RCS time-series reported in the file. It is needed to compute the
161 range scale of the RCS corresponding to each scan angle which should be
162 calculated as it follow:
163
164 where *r* is the range, ** is the scan angle value and *r* is the
165 value reported by *range\_resolution* variable. Altitude and range
166 resolution are the same if the scan angle is zero (zenith acquisition).
167
168 1. Variable name: *laser\_pointing\_angle*
169
170 Type: *double*
171
172 Number of dimensions: 1
173
174 Dimensions: *scan\_angles*
175
176 Location: Included in all the Low Resolution SCC L1 Product files
177
178 NetCDF definition: *double laser\_pointing\_angle(scan\_angles) *
179
180 Description: this variable provides the value of the zenith scan angles
181 used during the measurement. The value of angle are in degrees with
182 respect to the zenith direction.
183
184 1. Variable name: *emission\_wavelength*
185
186 Type: *double*
187
188 Number of dimensions: 1
189
190 Dimensions: *channels*
191
192 Location: Included in all the Low Resolution SCC L1 Product files
193
194 NetCDF definition: *double emission\_wavelength(channels) *
195
196 Description: this variable provides the value of the emission wavelength
197 (in nm) corresponding to each RCS time-series.
198
199 1. Variable name: *detection\_wavelength*
200
201 Type: *double*
202
203 Number of dimensions: 1
204
205 Dimensions: *channels*
206
207 Location: Included in all the Low Resolution SCC L1 Product files
208
209 NetCDF definition: *double detection\_wavelength(channels) *
210
211 Description: this variable provides the value of the detection
212 wavelength (in nm) corresponding to each RCS time-series. For elastic
213 channels the detection and emission wavelength are the same or slightly
214 different.
215
216 1. Variable name: *laser\_pointing\_angle\_of\_profiles*
217
218 Type: *integer*
219
220 Number of dimensions: 1
221
222 Dimensions: *time*
223
224 Location: Included in all the Low Resolution SCC L1 Product files
225
226 NetCDF definition: *int laser\_pointing\_angle\_of\_profiles(time)*
227
228 Description: this variable allows to identify the zenith angle at which
229 each single RCS contained in the time-series refer to. In particular,
230 for a given time the variable
231 *laser\_pointing\_angle\_of\_profiles(time)* provides the scan angle
232 index at which all the RCS included in the file refer to at the same
233 time. To get the value of the scan angle the variable
234 *laser\_pointing\_angle* should be evaluated in correspondence of the
235 index returned by the variable
236 *laser\_pointing\_angle\_of\_profiles(time)*.
237
238 1. Variable name: *shots*
239
240 Type: *integer*
241
242 Number of dimensions: 1
243
244 Dimensions: *time*
245
246 Location: Included in all the Low Resolution SCC L1 Product files
247
248 NetCDF definition: *int shots(time)*
249
250 Description: this variable report the number of laser shots that have
251 been integrated the all the RCS time-series at a given time.
252
253 1. Variable name: *start\_time*
254
255 Type: *integer*
256
257 Number of dimensions: 1
258
259 Dimensions: *time*
260
261 Location: Included in all the Low Resolution SCC L1 Product files
262
263 NetCDF definition: *int start\_time(time)*
264
265 Description: Variable reporting the value of the start time of each RCS
266 within all the time-series in seconds since the start of measurement.
267
268 1. Variable name: *stop\_time*
269
270 Type: *integer*
271
272 Number of dimensions: 1
273
274 Dimensions: *time*
275
276 Location: Included in all the Low Resolution SCC L1 Product files
277
278 NetCDF definition: *int stop\_time(time)*
279
280 Description:Variables reporting the value of the stop time of each RCS
281 within all the time-series in seconds since the start of the
282 measurement.
283
284 1. Variable name: *LR\_Input*
285
286 Type: *integer*
287
288 Number of dimensions: 0
289
290 Dimensions: N/A
291
292 Location: Present only if the Low Resolution SCC L1 Product corresponds
293 to an elastic only product
294
295 NetCDF definition: *int LR\_Input*
296
297 Description: this variable is only used by ELDA module in the elastic
298 only retrieval to know which value of particle lidar ratio assume in the
299 retrieval. A value of 1 means to use a fixed value stored in the SCC
300 database for each product. A value of 0 means to use a profile of lidar
301 ratio provided by the user as external file.
302
303 1. Variable name: *overlap\_correction*
304
305 Type: *integer*
306
307 Number of dimensions: 0
308
309 Dimensions: N/A
310
311 Location: Included in all the Low Resolution SCC L1 Product files
312
313 NetCDF definition: *int overlap\_correction *
314
315 Description: this variable provides information on the overlap
316 correction of all the RCS time-series included in the file. If it is set
317 to 1 the overlap correction has been applied if it is set to null value
318 the overlap correction has not been applied.
319
320 1. Variable name: *cloud\_flag*
321
322 Type: *integer*
323
324 Number of dimensions: 2
325
326 Dimensions: *time, points*
327
328 Location: Included in all the Low Resolution SCC L1 Product files
329
330 NetCDF definition: *int cloud\_flag(time, points)*
331
332 Description: variable reporting the cloud mask on the RCS time-series
333 included in the file. A value of 1 means no cloud any other values
334 different from 1 correspond to the presence of cloud.
335
336 Atmospheric Molecular Variables
337
338 1. Variable name: *Elastic\_Mol\_Extinction*
339
340 Type: *double*
341
342 Number of dimensions: 2
343
344 Dimensions: *scan\_angles, points*
345
346 Location: Included in all the Low Resolution SCC L1 Product files
347
348 NetCDF definition: *double Elastic\_Mol\_Extinction(scan\_angles,
349 points)*
350
351 Description: this variable provides the value of molecular extinction
352 coefficient at elastic wavelength in m\ :sup:`-1` at a given scan angle
353 and altitude (points). The values are calculated from standard models or
354 from radiosounding (submitted to the SCC as external input files)
355
356 1. Variable name: *LR\_Mol*
357
358 Type: *double*
359
360 Number of dimensions: 0
361
362 Dimensions: N/A
363
364 Location: Included in all the Low Resolution SCC L1 Product files
365
366 NetCDF definition: *double LR\_Mol*
367
368 Description: The value of calculated molecular lidar ratio in sr.
369
370 1. Variable name: *Emission\_Wave\_Mol\_Trasmissivity*
371
372 Type: *double*
373
374 Number of dimensions: 2
375
376 Dimensions: *scan\_angles, points*
377
378 Location: Included in all the Low Resolution SCC L1 Product files
379
380 NetCDF definition: *double
381 Emission\_Wave\_Mol\_Trasmissivity(scan\_angles, points)*
382
383 Description: this variable provides the value of molecular trasmissitivy
384 at emission wavelength at a given scan angle and altitude (*points*).
385
386 1. Variable name: *Detection\_Wave\_Mol\_Trasmissivity*
387
388 Type: *double*
389
390 Number of dimensions: 2
391
392 Dimensions: *scan\_angles, points*
393
394 Location: Included in all the Low Resolution SCC L1 Product files
395
396 NetCDF definition: *double
397 Detection\_Wave\_Mol\_Trasmissivity(scan\_angles, points)*
398
399 Description: this variable provides the value of molecular trasmissitivy
400 at detection wavelength at a given scan angle and altitude (*points*).
401
402 Aerosol Related Variables
403
404 1. Variable name: *elT*
405
406 Type: *double*
407
408 Number of dimensions: 2
409
410 Dimensions: *time, points*
411
412 Location: Present if the Low Resolution SCC L1 Product involves one
413 single elastic channel not split in near and far range
414
415 NetCDF definition: *double elT(time, points) *
416
417 Description: this variable contains the time-series of the RCS
418 corresponding to an elastic channel. The RCS may correspond to a single
419 physical lidar channel or to two physical channels (one optimized for
420 the near range and the other for the far range) that have been glued by
421 ELPP module.
422
423 1. Variable name: *elT\_err*
424
425 Type: *double*
426
427 Number of dimensions: 2
428
429 Dimensions: *time, points*
430
431 Location: Present if the Low Resolution SCC L1 Product involves one
432 single elastic channel not split in near and far range
433
434 NetCDF definition: *double elT\_err(time, points) *
435
436 Description: this variable describes the statistical uncertainties
437 corresponding to the variable *elT*.
438
439 1. Variable name: *elTnr*
440
441 Type: *double*
442
443 Number of dimensions: 2
444
445 Dimensions: *time, points*
446
447 Location: Present if the Low Resolution SCC L1 Product involves a near
448 range elastic channel
449
450 NetCDF definition: *double elTnr(time, points) *
451
452 Description: this variable contains the time-series of the RCS
453 corresponding to a near range elastic channel. If this variable is
454 present also the corresponding *elTfr *\ variable should be present in
455 the file.
456
457 1. Variable name: *elTnr\_err*
458
459 Type: *double*
460
461 Number of dimensions: 2
462
463 Dimensions: * time, points*
464
465 Location: Present if the Low Resolution SCC L1 Product involves a near
466 range elastic channel
467
468 NetCDF definition: *double elTnr\_err(time, points) *
469
470 Description: this variable describes the statistical uncertainties
471 corresponding to the variable *elTnr*.
472
473 1. Variable name: *elTfr*
474
475 Type: *double*
476
477 Number of dimensions: 2
478
479 Dimensions: *time, points*
480
481 Location: Present if the Low Resolution SCC L1 Product involves a far
482 range elastic channel
483
484 NetCDF definition: *double elTfr(time, points) *
485
486 Description: this variable contains the time-series of the RCS
487 corresponding to a far range elastic channel. If this variable is
488 present also the corresponding *elTnr *\ variable should be present in
489 the file.
490
491 1. Variable name: *elTfr\_err*
492
493 Type: *double*
494
495 Number of dimensions: 2
496
497 Dimensions: *time, points*
498
499 Location: Present if the Low Resolution SCC L1 Product involves a far
500 range elastic channel
501
502 NetCDF definition: *double elTfr\_err(time, points) *
503
504 Description: this variable describes the statistical uncertainties
505 corresponding to the variable *elTfr*.
506
507 1. Variable name: *vrRN2*
508
509 Type:\ * double*
510
511 Number of dimensions: 2
512
513 Dimensions: *time, points*
514
515 Location: Present if the Low Resolution SCC L1 Product involves one
516 vibro-rotational N2 Raman channel not split in near and far range
517
518 NetCDF definition: d\ *ouble vrRN2(time, points) *
519
520 Description: this variable contains the time-series of the RCS
521 corresponding to a vibro-rotational N2 Raman channel. The RCS may
522 correspond to a single physical lidar channel or to two physical
523 channels (one optimized for the near range and the other for the far
524 range) that have been glued by ELPP module.
525
526 1. Variable name: *vrRN2\_err*
527
528 Type: *double*
529
530 Number of dimensions: 2
531
532 Dimensions: *time, points*
533
534 Location: Present if the Low Resolution SCC L1 Product involves one
535 vibro-rotational N2 Raman channel not split in near and far range
536
537 NetCDF definition: *double vrRN2\_err(time, points) *
538
539 Description: this variable describes the statistical uncertainties
540 corresponding to the variable *vrRN2*.
541
542 1. Variable name: *vrRN2nr*
543
544 Type: *double*
545
546 Number of dimensions: 2
547
548 Dimensions: *time, points*
549
550 Location: Present if the Low Resolution SCC L1 Product involves a near
551 range vibro-rotational N2 Raman channel
552
553 NetCDF definition: *double vrRN2nr(time, points) *
554
555 Description: this variable contains the time-series of the RCS
556 corresponding to a near range vibro-rotationl N2 Raman. If this variable
557 is present also the corresponding *vrRN2fr *\ variable should be present
558 in the file.
559
560 1. Variable name: *vrRN2nr\_err*
561
562 Type: *double*
563
564 Number of dimensions: 2
565
566 Dimensions: *time, points*
567
568 Location: Present if the Low Resolution SCC L1 Product involves a near
569 range vibro-rotational N2 Raman channel
570
571 NetCDF definition: *double vrRN2nr\_err(time, points) *
572
573 Description: this variable describes the statistical uncertainties
574 corresponding to the variable *vrRN2nr*.
575
576 1. Variable name: *vrRN2fr*
577
578 Type: *double*
579
580 Number of dimensions: 2
581
582 Dimensions: *time, points*
583
584 Location: Present if the Low Resolution SCC L1 Product involves a far
585 range vibro-rotational N2 Raman channel
586
587 NetCDF definition: *double vrRN2fr(time, points) *
588
589 Description: this variable contains the time-series of the RCS
590 corresponding to a far range vibro-rotationl N2 Raman. If this variable
591 is present also the corresponding *vrRN2nr *\ variable should be present
592 in the file.
593
594 1. Variable name: *vrRN2fr\_err*
595
596 Type: *double*
597
598 Number of dimensions: 2
599
600 Dimensions: * time, points*
601
602 Location: Present if the Low Resolution SCC L1 Product involves a far
603 range vibro-rotational N2 Raman channel
604
605 NetCDF definition: *double vrRN2fr\_err(time, points) *
606
607 Description: this variable describes the statistical uncertainties
608 corresponding to the variable *vrRN2fr*.
609
610 Polarization related variables
611
612 1. Variable name: *elPT*
613
614 Type: *double*
615
616 Number of dimensions: 2
617
618 Dimensions: *time, points*
619
620 Location: Present if the Low Resolution SCC L1 Product involves
621 polarization sensitive elastic channels not split in near and far range
622
623 NetCDF definition: *double elPT(time, points) *
624
625 Description: this variable contains the time-series of the RCS
626 corresponding to the elastic polarization component which is transmitted
627 by the polarization sensitive optical subsystem. This component may
628 correspond to a total, cross or parallel polarization component
629 depending on the particular system configuration. Moreover the RCS may
630 correspond to a single physical lidar channel or to two physical
631 channels (one optimized for the near range and the other for the far
632 range) that have been glued by ELPP module.
633
634 1. Variable name: *elPT\_err*
635
636 Type: *double*
637
638 Number of dimensions: 2
639
640 Dimensions: *time, points*
641
642 Location: Present if the Low Resolution SCC L1 Product involves
643 spolarization sensitive elastic channels not split in near and far range
644
645 NetCDF definition: *double elPT\_err(time, points) *
646
647 Description: this variable describes the statistical uncertainties
648 corresponding to the variable *elPT*.
649
650 1. Variable name: *elPTnr*
651
652 Type: *double*
653
654 Number of dimensions: 2
655
656 Dimensions: * time, points*
657
658 Location: Present if the Low Resolution SCC L1 Product involves near
659 range polarization sensitive elastic channels
660
661 NetCDF definition: *double elPTnr(time, points) *
662
663 Description: this variable contains the time-series of the RCS
664 corresponding to the near range elastic polarization component which is
665 transmitted by the polarization sensitive optical subsystem. This
666 component may correspond to a total, cross or parallel polarization
667 component depending on the particular system configuration. If this
668 variable is present also the corresponding *elPTfr* variable should be
669 present in the file.
670
671 1. Variable name: *elPTnr\_err*
672
673 Type: *double*
674
675 Number of dimensions: 2
676
677 Dimensions: * time, points*
678
679 Location: Present if the Low Resolution SCC L1 Product involves near
680 range polarization sensitive elastic channels
681
682 NetCDF definition: *double elPTnr\_err(time, points) *
683
684 Description: this variable describes the statistical uncertainties
685 corresponding to the variable *elPTnr*.
686
687 1. Variable name: *elPTfr*
688
689 Type: *double*
690
691 Number of dimensions: 2
692
693 Dimensions: *time, points*
694
695 Location: Present if the Low Resolution SCC L1 Product involves far
696 range polarization sensitive elastic channels
697
698 NetCDF definition: *double elTfr(time, points) *
699
700 Description: this variable contains the time-series of the RCS
701 corresponding to the far range elastic polarization component which is
702 transmitted by the polarization sensitive optical subsystem. This
703 component may correspond to a total, cross or parallel polarization
704 component depending on the particular system configuration. If this
705 variable is present also the corresponding elPTnr variable should be
706 present in the file.
707
708 1. Variable name: *elPTfr\_err*
709
710 Type: *double*
711
712 Number of dimensions: 2
713
714 Dimensions: * time, points*
715
716 Location: Present if the Low Resolution SCC L1 Product involves far
717 range polarization sensitive elastic channels
718
719 NetCDF definition: *double elPTfr\_err(time, points) *
720
721 Description: this variable describes the statistical uncertainties
722 corresponding to the variable *elPTfr*.
723
724 1. Variable name: *elPR*
725
726 Type: *double*
727
728 Number of dimensions: 2
729
730 Dimensions: *time, points*
731
732 Location: Present if the Low Resolution SCC L1 Product involves
733 polarization sensitive elastic channels not split in near and far range
734
735 NetCDF definition: *double elPR(time, points) *
736
737 Description: this variable contains the time-series of the RCS
738 corresponding to the elastic polarization component which is reflected
739 by the polarization sensitive optical subsystem. This component may
740 correspond to a total, cross or parallel polarization component
741 depending on the particular system configuration. Moreover the RCS may
742 correspond to a single physical lidar channel or to two physical
743 channels (one optimized for the near range and the other for the far
744 range) that have been glued by ELPP module.
745
746 1. Variable name: *elPR\_err*
747
748 Type: *double*
749
750 Number of dimensions: 2
751
752 Dimensions: * time, points*
753
754 Location: Present if the Low Resolution SCC L1 Product involves
755 polarization sensitive elastic channels not split in near and far range
756
757 NetCDF definition: *double elPR\_err(time, points) *
758
759 Description: this variable describes the statistical uncertainties
760 corresponding to the variable *elPR*.
761
762 1. Variable name: *elPRnr*
763
764 Type: *double*
765
766 Number of dimensions: 2
767
768 Dimensions: * time, points*
769
770 Location: Present if the Low Resolution SCC L1 Product involves near
771 range polarization sensitive elastic channels
772
773 NetCDF definition: *double elPTnr(time, points) *
774
775 Description: this variable contains the time-series of the RCS
776 corresponding to the near range elastic polarization component which is
777 reflected by the polarization sensitive optical subsystem. This
778 component may correspond to a total, cross or parallel polarization
779 component depending on the particular system configuration. If this
780 variable is present also the corresponding *elPRfr* variable should be
781 present in the file.
782
783 1. Variable name: *elPRnr\_err*
784
785 Type: *double*
786
787 Number of dimensions: 2
788
789 Dimensions: *time, points*
790
791 Location: Present if the Low Resolution SCC L1 Product involves near
792 range polarization sensitive elastic channels
793
794 NetCDF definition: * double elPRnr\_err(time, points) *
795
796 Description: this variable describes the statistical uncertainties
797 corresponding to the variable *elPRnr*.
798
799 1. Variable name: *elPRfr*
800
801 Type: *double*
802
803 Number of dimensions: 2
804
805 Dimensions: *time, points*
806
807 Location: Present if the Low Resolution SCC L1 Product involves far
808 range polarization sensitive elastic channels
809
810 NetCDF definition: *double elPRfr(time, points) *
811
812 Description: this variable contains the time-series of the RCS
813 corresponding to the far range elastic polarization component which is
814 reflected by the polarization sensitive optical subsystem. This
815 component may correspond to a total, cross or parallel polarization
816 component depending on the particular system configuration. If this
817 variable is present also the corresponding *elPRnr* variable should be
818 present in the file.
819
820 1. Variable name: *elPRfr\_err*
821
822 Type: *double*
823
824 Number of dimensions: 2
825
826 Dimensions: *time, points*
827
828 Location: Present if the Low Resolution SCC L1 Product involves far
829 range polarization sensitive elastic channels
830
831 NetCDF definition: *double elPRfr\_err(time, points) *
832
833 Description: this variable describes the statistical uncertainties
834 corresponding to the variable *elPRfr*.
835
836 1. Variable name: *G\_T*
837
838 Type: *double*
839
840 Number of dimensions: 0
841
842 Dimensions: N/A
843
844 Location: Present if the Low Resolution SCC L1 Product involves
845 polarization sensitive elastic channels
846
847 NetCDF definition: *double G\_T *
848
849 Description: G polarization cross-talk factor value corresponding to the
850 polarization transmitted channel.
851
852 1. Variable name: *G\_T\_Statistical\_Err*
853
854 Type: *double*
855
856 Number of dimensions: 0
857
858 Dimensions: N/A
859
860 Location: Present if the Low Resolution SCC L1 Product involves
861 polarization sensitive elastic channels
862
863 NetCDF definition: *double G\_T\_Statistical\_Err*
864
865 Description: this variable describes the statistical uncertainties
866 corresponding to the variable *G\_T*.
867
868 1. Variable name: *G\_T\_Systematic\_Err*
869
870 Type: *double*
871
872 Number of dimensions: 0
873
874 Dimensions: N/A
875
876 Location: Present if the Low Resolution SCC L1 Product involves
877 polarization sensitive elastic channels
878
879 NetCDF definition: *double G\_T\_Systematic\_Err*
880
881 Description: this variable describes the systematic uncertainties
882 corresponding to the variable *G\_T*.
883
884 1. Variable name: *H\_T*
885
886 Type: *double*
887
888 Number of dimensions: 0
889
890 Dimensions: N/A
891
892 Location: Present if the Low Resolution SCC L1 Product involves
893 polarization sensitive elastic channels
894
895 NetCDF definition: *double H\_T *
896
897 Description: H polarization cross-talk factor value corresponding to the
898 polarization transmitted channel.
899
900 1. Variable name: *H\_T\_Statistical\_Err*
901
902 Type: *double*
903
904 Number of dimensions: 0
905
906 Dimensions: N/A
907
908 Location: Present if the Low Resolution SCC L1 Product involves
909 polarization sensitive elastic channels
910
911 NetCDF definition: *double H\_T\_Statistical\_Err*
912
913 Description: this variable describes the statistical uncertainties
914 corresponding to the variable *H\_T*.
915
916 1. Variable name: *H\_T\_Systematic\_Err*
917
918 Type: *double*
919
920 Number of dimensions: 0
921
922 Dimensions: N/A
923
924 Location: Present if the Low Resolution SCC L1 Product involves
925 polarization sensitive elastic channels
926
927 NetCDF definition: *double H\_T\_Systematic\_Err*
928
929 Description: this variable describes the systematic uncertainties
930 corresponding to the variable *H\_T*.
931
932 1. Variable name: *G\_R*
933
934 Type: *double*
935
936 Number of dimensions: 0
937
938 Dimensions: N/A
939
940 Location: Present if the Low Resolution SCC L1 Product involves
941 polarization sensitive elastic channels
942
943 NetCDF definition: *double G\_R *
944
945 Description: G polarization cross-talk factor value corresponding to the
946 polarization reflected channel.
947
948 1. Variable name: *G\_R\_Statistical\_Err*
949
950 Type: *double*
951
952 Number of dimensions: 0
953
954 Dimensions: N/A
955
956 Location: Present if the Low Resolution SCC L1 Product involves
957 polarization sensitive elastic channels
958
959 NetCDF definition: *double G\_R\_Statistical\_Err*
960
961 Description: this variable describes the statistical uncertainties
962 corresponding to the variable *G\_R*.
963
964 1. Variable name: *G\_R\_Systematic\_Err*
965
966 Type: *double*
967
968 Number of dimensions: 0
969
970 Dimensions: N/A
971
972 Location: Present if the Low Resolution SCC L1 Product involves
973 polarization sensitive elastic channels
974
975 NetCDF definition: * double G\_R\_Systematic\_Err*
976
977 Description: this variable describes the systematic uncertainties
978 corresponding to the variable *G\_R*.
979
980 1. Variable name: *H\_R*
981
982 Type: *double*
983
984 Number of dimensions: 0
985
986 Dimensions: N/A
987
988 Location: Present if the Low Resolution SCC L1 Product involves
989 polarization sensitive elastic channels
990
991 NetCDF definition: *double H\_R*
992
993 Description: H polarization cross-talk factor value corresponding to the
994 polarization reflected channel.
995
996 1. Variable name: *H\_R\_Statistical\_Err*
997
998 Type: *double*
999
1000 Number of dimensions: 0
1001
1002 Dimensions: N/A
1003
1004 Location: Present if the Low Resolution SCC L1 Product involves
1005 polarization sensitive elastic channels
1006
1007 NetCDF definition: *double H\_R\_Statistical\_Err*
1008
1009 Description: this variable describes the statistical uncertainties
1010 corresponding to the variable *H\_R*.
1011
1012 1. Variable name: *H\_R\_Systematic\_Err*
1013
1014 Type: *double*
1015
1016 Number of dimensions: 0
1017
1018 Dimensions: N/A
1019
1020 Location: Present if the Low Resolution SCC L1 Product involves
1021 polarization sensitive elastic channels
1022
1023 NetCDF definition: *double H\_R\_Systematic\_Err*
1024
1025 Description: this variable describes the systematic uncertainties
1026 corresponding to the variable *H\_R*.
1027
1028 1. Variable name: *Polarization\_Channel\_Gain\_Factor *
1029
1030 Type: *double*
1031
1032 Number of dimensions: 0
1033
1034 Dimensions: N/A
1035
1036 Location: Present if the Low Resolution SCC L1 Product involves
1037 polarization sensitive elastic channels
1038
1039 NetCDF definition: *double Polarization\_Channel\_Gain\_Factor*
1040
1041 Description: this variable reports the value of the gain ratio of the
1042 reflected and transmitted polarization channels.
1043
1044 1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Statistical\_Err
1045 *
1046
1047 Type: *double*
1048
1049 Number of dimensions: 0
1050
1051 Dimensions: N/A
1052
1053 Location: Present if the Low Resolution SCC L1 Product involves
1054 polarization sensitive elastic channels
1055
1056 NetCDF definition: *double
1057 Polarization\_Channel\_Gain\_Factor\_Statistical\_Err *
1058
1059 Description: this variable describes the statistical uncertainties
1060 corresponding to the variable *Polarization\_Channel\_Gain\_Factor*.
1061
1062 1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Systematic\_Err
1063 *
1064
1065 Type: *double*
1066
1067 Number of dimensions: 0
1068
1069 Dimensions: N/A
1070
1071 Location: Present if the Low Resolution SCC L1 Product involves
1072 polarization sensitive elastic channels
1073
1074 NetCDF definition: *double
1075 Polarization\_Channel\_Gain\_Factor\_Systematic\_Err *
1076
1077 Description: this variable describes the systematic uncertainties
1078 corresponding to the variable *Polarization\_Channel\_Gain\_Factor*.
1079
1080 1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Correction *
1081
1082 Type: *double*
1083
1084 Number of dimensions: 0
1085
1086 Dimensions: N/A
1087
1088 Location: Present if the Low Resolution SCC L1 Product involves
1089 polarization sensitive elastic channels
1090
1091 NetCDF definition: *double
1092 Polarization\_Channel\_Gain\_Factor\_Correction*
1093
1094 Description: this variable reports the value of the correction to the
1095 gain ratio of the reflected and transmitted polarization channels.
1096
1097 1. Variable name:
1098 *Polarization\_Channel\_Gain\_Factor\_Correction\_Statistical\_Err *
1099
1100 Type: *double*
1101
1102 Number of dimensions: 0
1103
1104 Dimensions: N/A
1105
1106 Location: Present if the Low Resolution SCC L1 Product involves
1107 polarization sensitive elastic channels
1108
1109 NetCDF definition: * double
1110 Polarization\_Channel\_Gain\_Factor\_Correction\_Statistical\_Err *
1111
1112 Description: this variable describes the statistical uncertainties
1113 corresponding to the variable
1114 *Polarization\_Channel\_Gain\_Factor\_Correction*.
1115
1116 1. Variable name:
1117 *Polarization\_Channel\_Gain\_Factor\_Correction\_Systematic\_Err *
1118
1119 Type: *double*
1120
1121 Number of dimensions: 0
1122
1123 Dimensions: N/A
1124
1125 Location: Present if the Low Resolution SCC L1 Product involves
1126 polarization sensitive elastic channels
1127
1128 NetCDF definition: *double
1129 Polarization\_Channel\_Gain\_Factor\_Correction\_Systematic\_Err *
1130
1131 Description: this variable describes the systematic uncertainties
1132 corresponding to the variable
1133 *Polarization\_Channel\_Gain\_Factor\_Correction*.
1134
1135 1. Variable name: *G\_T\_Near\_Range*
1136
1137 Type: *double*
1138
1139 Number of dimensions: 0
1140
1141 Dimensions: N/A
1142
1143 Location: Present if the Low Resolution SCC L1 Product involves near
1144 range polarization sensitive elastic channels
1145
1146 NetCDF definition: *double G\_T\_Near\_Range *
1147
1148 Description: G polarization cross-talk factor value corresponding to the
1149 near range polarization transmitted channel.
1150
1151 1. Variable name: *G\_T\_Near\_Range\_Statistical\_Err*
1152
1153 Type: *double*
1154
1155 Number of dimensions: 0
1156
1157 Dimensions: N/A
1158
1159 Location: Present if the Low Resolution SCC L1 Product involves near
1160 range polarization sensitive elastic channels
1161
1162 NetCDF definition: *double G\_T\_Near\_Range\_Statistical\_Err*
1163
1164 Description: this variable describes the statistical uncertainties
1165 corresponding to the variable *G\_T\_Near\_Range*.
1166
1167 1. Variable name: *G\_T\_Near\_Range\_Systematic\_Err*
1168
1169 Type: *double*
1170
1171 Number of dimensions: 0
1172
1173 Dimensions: N/A
1174
1175 Location: Present if the Low Resolution SCC L1 Product involves near
1176 range polarization sensitive elastic channels
1177
1178 NetCDF definition: *double G\_T\_Near\_Range\_Systematic\_Err*
1179
1180 Description: this variable describes the systematic uncertainties
1181 corresponding to the variable *G\_T\_Near\_Range*.
1182
1183 1. Variable name: *H\_T\_Near\_Range*
1184
1185 Type: *double*
1186
1187 Number of dimensions: 0
1188
1189 Dimensions: N/A
1190
1191 Location: Present if the Low Resolution SCC L1 Product involves near
1192 range polarization sensitive elastic channels
1193
1194 NetCDF definition: *double H\_T\_Near\_Range *
1195
1196 Description: H polarization cross-talk factor value corresponding to the
1197 near range polarization transmitted channel.
1198
1199 1. Variable name: *H\_T\_Near\_Range\_Statistical\_Err*
1200
1201 Type: *double*
1202
1203 Number of dimensions: 0
1204
1205 Dimensions: N/A
1206
1207 Location: Present if the Low Resolution SCC L1 Product involves near
1208 range polarization sensitive elastic channels
1209
1210 NetCDF definition: *double H\_T\_Near\_Range\_Statistical\_Err*
1211
1212 Description: this variable describes the statistical uncertainties
1213 corresponding to the variable *H\_T\_Near\_Range*.
1214
1215 1. Variable name: *H\_T\_Near\_Range\_Systematic\_Err*
1216
1217 Type: *double*
1218
1219 Number of dimensions: 0
1220
1221 Dimensions: N/A
1222
1223 Location: Present if the Low Resolution SCC L1 Product involves near
1224 range polarization sensitive elastic channels
1225
1226 NetCDF definition: *double H\_T\_Near\_Range\_Systematic\_Err*
1227
1228 Description: this variable describes the systematic uncertainties
1229 corresponding to the variable *H\_T\_Near\_Range*.
1230
1231 1. Variable name: *G\_R\_Near\_Range*
1232
1233 Type: *double*
1234
1235 Number of dimensions: 0
1236
1237 Dimensions: N/A
1238
1239 Location: Present if the Low Resolution SCC L1 Product involves near
1240 range polarization sensitive elastic channels
1241
1242 NetCDF definition: *double G\_R\_Near\_Range *
1243
1244 Description: G polarization cross-talk factor value corresponding to the
1245 near range polarization reflected channel.
1246
1247 1. Variable name: *G\_R\_Near\_Range\_Statistical\_Err*
1248
1249 Type: *double*
1250
1251 Number of dimensions: 0
1252
1253 Dimensions: N/A
1254
1255 Location: Present if the Low Resolution SCC L1 Product involves near
1256 range polarization sensitive elastic channels
1257
1258 NetCDF definition: *double G\_R\_Near\_Range\_Statistical\_Err*
1259
1260 Description: this variable describes the statistical uncertainties
1261 corresponding to the variable *G\_R\_Near\_Range*.
1262
1263 1. Variable name: *G\_R\_Near\_Range\_Systematic\_Err*
1264
1265 Type: *double*
1266
1267 Number of dimensions: 0
1268
1269 Dimensions: N/A
1270
1271 Location: Present if the Low Resolution SCC L1 Product involves near
1272 range polarization sensitive elastic channels
1273
1274 NetCDF definition: *double G\_R\_Near\_Range\_Systematic\_Err*
1275
1276 Description: this variable describes the systematic uncertainties
1277 corresponding to the variable *G\_R\_Near\_Range*.
1278
1279 1. Variable name: *H\_R\_Near\_Range*
1280
1281 Type: *double*
1282
1283 Number of dimensions: 0
1284
1285 Dimensions: N/A
1286
1287 Location: Present if the Low Resolution SCC L1 Product involves near
1288 range polarization sensitive elastic channels
1289
1290 NetCDF definition: *double H\_R\_Near\_Range*
1291
1292 Description: H polarization cross-talk factor value corresponding to the
1293 near range polarization reflected channel.
1294
1295 1. Variable name: *H\_R\_Near\_Range\_Statistical\_Err*
1296
1297 Type: *double*
1298
1299 Number of dimensions: 0
1300
1301 Dimensions: N/A
1302
1303 Location: Present if the Low Resolution SCC L1 Product involves near
1304 range polarization sensitive elastic channels
1305
1306 NetCDF definition: * double H\_R\_Near\_Range\_Statistical\_Err*
1307
1308 Description: this variable describes the statistical uncertainties
1309 corresponding to the variable *H\_R\_Near\_Range*.
1310
1311 1. Variable name: *H\_R\_Near\_Range\_Systematic\_Err*
1312
1313 Type: *double*
1314
1315 Number of dimensions: 0
1316
1317 Dimensions: N/A
1318
1319 Location: Present if the Low Resolution SCC L1 Product involves near
1320 range polarization sensitive elastic channels
1321
1322 NetCDF definition: *double H\_R\_Near\_Range\_Systematic\_Err*
1323
1324 Description: this variable describes the systematic uncertainties
1325 corresponding to the variable *H\_R\_Near\_Range*.
1326
1327 1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Near\_Range *
1328
1329 Type: *double*
1330
1331 Number of dimensions: 0
1332
1333 Dimensions: N/A
1334
1335 Location: Present if the Low Resolution SCC L1 Product involves near
1336 range polarization sensitive elastic channels
1337
1338 NetCDF definition: *double
1339 Polarization\_Channel\_Gain\_Factor\_Near\_Range*
1340
1341 Description: this variable reports the value of the gain ratio of the
1342 near range reflected and transmitted polarization channels.
1343
1344 1. Variable name:
1345 *Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Statistical\_Err *
1346
1347 Type: *double*
1348
1349 Number of dimensions: 0
1350
1351 Dimensions: N/A
1352
1353 Location: Present if the Low Resolution SCC L1 Product involves near
1354 range polarization sensitive elastic channels
1355
1356 NetCDF definition: *double
1357 Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Statistical\_Err *
1358
1359 Description: this variable describes the statistical uncertainties
1360 corresponding to the variable
1361 *Polarization\_Channel\_Gain\_Near\_Range\_Factor*.
1362
1363 1. Variable name:
1364 *Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Systematic\_Err *
1365
1366 Type: *double*
1367
1368 Number of dimensions: 0
1369
1370 Dimensions: N/A
1371
1372 Location: Present if the Low Resolution SCC L1 Product involves near
1373 range polarization sensitive elastic channels
1374
1375 NetCDF definition: *double
1376 Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Systematic\_Err *
1377
1378 Description: this variable describes the systematic uncertainties
1379 corresponding to the variable
1380 *Polarization\_Channel\_Gain\_Factor\_Near\_Range*.
1381
1382 1. Variable name:
1383 *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range *
1384
1385 Type: *double*
1386
1387 Number of dimensions: 0
1388
1389 Dimensions: N/A
1390
1391 Location: Present if the Low Resolution SCC L1 Product involves near
1392 range polarization sensitive elastic channels
1393
1394 NetCDF definition: *double
1395 Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range*
1396
1397 Description: this variable reports the value of the correction to the
1398 near range gain ratio of the reflected and transmitted polarization
1399 channels.
1400
1401 1. Variable name:
1402 *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Statistical\_Err*
1403
1404 Type: *double*
1405
1406 Number of dimensions: 0
1407
1408 Dimensions: N/A
1409
1410 Location: Present if the Low Resolution SCC L1 Product involves near
1411 range polarization sensitive elastic channels
1412
1413 NetCDF definition:\ * *
1414
1415 *double
1416 Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Statistical\_Err
1417 *
1418
1419 Description: this variable describes the statistical uncertainties
1420 corresponding to the variable
1421 *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range*.
1422
1423 1. Variable name:
1424 *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Systematic\_Err
1425 *
1426
1427 Type: *double*
1428
1429 Number of dimensions: 0
1430
1431 Dimensions: N/A
1432
1433 Location: Present if the Low Resolution SCC L1 Product involves near
1434 range polarization sensitive elastic channels
1435
1436 NetCDF definition:
1437
1438 *double
1439 Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Systematic\_Err
1440 *
1441
1442 Description: this variable describes the systematic uncertainties
1443 corresponding to the variable
1444 *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range*.
1445
1446 1. Variable name: *G\_T\_Far\_Range*
1447
1448 Type: *double*
1449
1450 Number of dimensions: 0
1451
1452 Dimensions: N/A
1453
1454 Location: Present if the Low Resolution SCC L1 Product involves far
1455 range polarization sensitive elastic channels
1456
1457 NetCDF definition: *double G\_T\_Far\_Range *
1458
1459 Description: G polarization cross-talk factor value corresponding to the
1460 far range polarization transmitted channel.
1461
1462 1. Variable name: *G\_T\_Far\_Range\_Statistical\_Err*
1463
1464 Type: *double*
1465
1466 Number of dimensions: 0
1467
1468 Dimensions: N/A
1469
1470 Location: Present if the Low Resolution SCC L1 Product involves far
1471 range polarization sensitive elastic channels
1472
1473 NetCDF definition: *double G\_T\_Far\_Range\_Statistical\_Err*
1474
1475 Description: this variable describes the statistical uncertainties
1476 corresponding to the variable *G\_T\_Far\_Range*.
1477
1478 1. Variable name: *G\_T\_Far\_Range\_Systematic\_Err*
1479
1480 Type: *double*
1481
1482 Number of dimensions: 0
1483
1484 Dimensions: N/A
1485
1486 Location: Present if the Low Resolution SCC L1 Product involves far
1487 range polarization sensitive elastic channels
1488
1489 NetCDF definition: *double G\_T\_Far\_Range\_Systematic\_Err*
1490
1491 Description: this variable describes the systematic uncertainties
1492 corresponding to the variable *G\_T\_Far\_Range*.
1493
1494 1. Variable name: *H\_T\_Far\_Range*
1495
1496 Type: *double*
1497
1498 Number of dimensions: 0
1499
1500 Dimensions: N/A
1501
1502 Location: Present if the Low Resolution SCC L1 Product involves far
1503 range polarization sensitive elastic channels
1504
1505 NetCDF definition: *double H\_T\_Far\_Range *
1506
1507 Description: H polarization cross-talk factor value corresponding to the
1508 far range polarization transmitted channel.
1509
1510 1. Variable name: *H\_T\_Far\_Range\_Statistical\_Err*
1511
1512 Type: *double*
1513
1514 Number of dimensions: 0
1515
1516 Dimensions: N/A
1517
1518 Location: Present if the Low Resolution SCC L1 Product involves far
1519 range polarization sensitive elastic channels
1520
1521 NetCDF definition: *double H\_T\_Far\_Range\_Statistical\_Err*
1522
1523 Description: this variable describes the statistical uncertainties
1524 corresponding to the variable *H\_T\_Far\_Range*.
1525
1526 1. Variable name: *H\_T\_Far\_Range\_Systematic\_Err*
1527
1528 Type: *double*
1529
1530 Number of dimensions: 0
1531
1532 Dimensions: N/A
1533
1534 Location: Present if the Low Resolution SCC L1 Product involves far
1535 range polarization sensitive elastic channels
1536
1537 NetCDF definition: d\ *ouble H\_T\_Far\_Range\_Systematic\_Err*
1538
1539 Description: this variable describes the systematic uncertainties
1540 corresponding to the variable *H\_T\_Far\_Range*.
1541
1542 1. Variable name: *G\_R\_Far\_Range*
1543
1544 Type: *double*
1545
1546 Number of dimensions: 0
1547
1548 Dimensions: N/A
1549
1550 Location: Present if the Low Resolution SCC L1 Product involves far
1551 range polarization sensitive elastic channels
1552
1553 NetCDF definition: *double G\_R\_Far\_Range *
1554
1555 Description: G polarization cross-talk factor value corresponding to the
1556 far range polarization reflected channel.
1557
1558 1. Variable name: *G\_R\_Far\_Range\_Statistical\_Err*
1559
1560 Type: *double*
1561
1562 Number of dimensions: 0
1563
1564 Dimensions: N/A
1565
1566 Location: Present if the Low Resolution SCC L1 Product involves far
1567 range polarization sensitive elastic channels
1568
1569 NetCDF definition: *double G\_R\_Far\_Range\_Statistical\_Err*
1570
1571 Description: this variable describes the statistical uncertainties
1572 corresponding to the variable *G\_R\_Far\_Range*.
1573
1574 1. Variable name: *G\_R\_Far\_Range\_Systematic\_Err*
1575
1576 Type: *double*
1577
1578 Number of dimensions: 0
1579
1580 Dimensions: N/A
1581
1582 Location: Present if the Low Resolution SCC L1 Product involves far
1583 range polarization sensitive elastic channels
1584
1585 NetCDF definition: *double G\_R\_Far\_Range\_Systematic\_Err*
1586
1587 Description: this variable describes the systematic uncertainties
1588 corresponding to the variable *G\_R\_Far\_Range*.
1589
1590 1. Variable name: *H\_R\_Far\_Range*
1591
1592 Type: *double*
1593
1594 Number of dimensions: 0
1595
1596 Dimensions: N/A
1597
1598 Location: Present if the Low Resolution SCC L1 Product involves far
1599 range polarization sensitive elastic channels
1600
1601 NetCDF definition: *double H\_R\_Far\_Range*
1602
1603 Description: H polarization cross-talk factor value corresponding to the
1604 far range polarization reflected channel.
1605
1606 1. Variable name: *H\_R\_Far\_Range\_Statistical\_Err*
1607
1608 Type: *double*
1609
1610 Number of dimensions: 0
1611
1612 Dimensions: N/A
1613
1614 Location: Present if the Low Resolution SCC L1 Product involves far
1615 range polarization sensitive elastic channels
1616
1617 NetCDF definition: *double H\_R\_Far\_Range\_Statistical\_Err*
1618
1619 Description: this variable describes the statistical uncertainties
1620 corresponding to the variable *H\_R\_Far\_Range*.
1621
1622 1. Variable name: *H\_R\_Far\_Range\_Systematic\_Err*
1623
1624 Type: *double*
1625
1626 Number of dimensions: 0
1627
1628 Dimensions: N/A
1629
1630 Location: Present if the Low Resolution SCC L1 Product involves far
1631 range polarization sensitive elastic channels
1632
1633 NetCDF definition: *double H\_R\_Far\_Range\_Systematic\_Err*
1634
1635 Description: this variable describes the systematic uncertainties
1636 corresponding to the variable *H\_R\_Far\_Range*.
1637
1638 1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Far\_Range *
1639
1640 Type: *double*
1641
1642 Number of dimensions: 0
1643
1644 Dimensions: N/A
1645
1646 Location: Present if the Low Resolution SCC L1 Product involves far
1647 range polarization sensitive elastic channels
1648
1649 NetCDF definition: *double
1650 Polarization\_Channel\_Gain\_Factor\_Far\_Range*
1651
1652 Description: this variable reports the value of the gain ratio of the
1653 far range reflected and transmitted polarization channels.
1654
1655 1. Variable name:
1656 *Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Statistical\_Err *
1657
1658 Type: *double*
1659
1660 Number of dimensions: 0
1661
1662 Dimensions: N/A
1663
1664 Location: Present if the Low Resolution SCC L1 Product involves far
1665 range polarization sensitive elastic channels
1666
1667 NetCDF definition: *double
1668 Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Statistical\_Err *
1669
1670 Description: this variable describes the statistical uncertainties
1671 corresponding to the variable
1672 *Polarization\_Channel\_Gain\_Far\_Range\_Factor*.
1673
1674 1. Variable name:
1675 P\ *olarization\_Channel\_Gain\_Factor\_Far\_Range\_Systematic\_Err *
1676
1677 Type: *double*
1678
1679 Number of dimensions: 0
1680
1681 Dimensions: N/A
1682
1683 Location: Present if the Low Resolution SCC L1 Product involves far
1684 range polarization sensitive elastic channels
1685
1686 NetCDF definition: *double
1687 Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Systematic\_Err *
1688
1689 Description: this variable describes the systematic uncertainties
1690 corresponding to the variable
1691 *Polarization\_Channel\_Gain\_Factor\_Far\_Range*.
1692
1693 1. Variable name:
1694 *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range *
1695
1696 Type: *double*
1697
1698 Number of dimensions: 0
1699
1700 Dimensions: N/A
1701
1702 Location: Present if the Low Resolution SCC L1 Product involves far
1703 range polarization sensitive elastic channels
1704
1705 NetCDF definition: d\ *ouble
1706 Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range*
1707
1708 Description: this variable reports the value of the correction to the
1709 far range gain ratio of the reflected and transmitted polarization
1710 channels.
1711
1712 1. Variable name:
1713 *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Statistical\_Err
1714 *
1715
1716 Type: *double*
1717
1718 Number of dimensions: 0
1719
1720 Dimensions: N/A
1721
1722 Location: Present if the Low Resolution SCC L1 Product involves far
1723 range polarization sensitive elastic channels
1724
1725 NetCDF definition:
1726
1727 d\ *ouble
1728 Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Statistical\_Err
1729 *
1730
1731 Description: this variable describes the statistical uncertainties
1732 corresponding to the variable
1733 *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range*.
1734
1735 1. Variable name:
1736 *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Systematic\_Err
1737 *
1738
1739 Type: *double*
1740
1741 Number of dimensions: 0
1742
1743 Dimensions: N/A
1744
1745 Location: Present if the Low Resolution SCC L1 Product involves far
1746 range polarization sensitive elastic channels
1747
1748 NetCDF definition:
1749
1750 *double
1751 Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Systematic\_Err
1752 *
1753
1754 Description: this variable describes the systematic uncertainties
1755 corresponding to the variable
1756 *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range*.
1757
1758 1. Variable name: *Depolarization\_Calibration\_Type *
1759
1760 Type: *integer*
1761
1762 Number of dimensions: 0
1763
1764 Dimensions: N/A
1765
1766 Location: Present if the Low Resolution SCC L1 Product involves
1767 polarization sensitive elastic channels
1768
1769 NetCDF definition: * int Depolarization\_Calibration\_Type *
1770
1771 Description: this variable describes the type of depolarization
1772 calibration that has been performed. A value of 1 means automatic
1773 calibration made the the SCC, a value of 2 means manual calibration
1774 inserted into the SCC database.
1775
1776 1. Variable name: *Molecular\_Linear\_Depolarization\_Ratio *
1777
1778 Type: *double*
1779
1780 Number of dimensions: 2
1781
1782 Dimensions: *scan\_angles,points*
1783
1784 Location: Present if the Low Resolution SCC L1 Product involves
1785 polarization sensitive elastic channels
1786
1787 NetCDF definition: *double
1788 Molecular\_Linear\_Depolarization\_Ratio(scan\_angles, points) *
1789
1790 Description: this variable report the value of molecular linear
1791 depolarization ration for at given scan angles and at given altitude
1792 (*points*). This profile is calculated on the base of the atmospheric
1793 data from standard models or radiosonding submitted by the user as
1794 separate file.
1795
1796 The altitude scale at which each RCS within the time-series reported by
1797 the variables *elT, elTnr, elTfr, vrRN2, vrRN2nr, vrRN2fr, elPT, elPTnr,
1798 elPTfr, elPR, elPRnr, elPRfr*, refer to can be obtained as:
1799
1800 H(laser\_pointing\_angle\_of\_profiles(time),points)
1801
1802 The total signal (*I*\ :sub:`*total*`) and the volume depolarization
1803 ratio (**) can be calculated out of reflected (*I*\ :sub:`*R*`) and
1804 transmitted (*I*\ :sub:`*T*`) polarization component intensities using
1805 the following equations:
1806
1807 where *\** is the gain ratio of the reflected and transmitted
1808 polarization channels (variable *Polarization\_Channel\_Gain\_Factor*);
1809 *K* is the correction to the gain ratio of the reflected and transmitted
1810 polarization channels (variable
1811 *Polarization\_Channel\_Gain\_Factor\_Correction*); *I*\ :sub:`*R*` is
1812 the intensity of the reflected polarization component (variable *elPR*);
1813 *I*\ :sub:`*T*` is the intensity of the transmitted polarization
1814 component (variable *elPT*); and *G*\ :sub:`*T*`, *H*\ :sub:`*T*`,
1815 *G*\ :sub:`*R*` and *H*\ :sub:`*R*` are the polarization cross-talk
1816 parameters (variables *G\_T, H\_T, G\_R* and *H\_R*).
1817
1818 1.
1819
1820 1. .. rubric:: Low Resolution SCC L1 Product Format: global
1821 attributes
1822 :name: low-resolution-scc-l1-product-format-global-attributes
1823
1824 In this section all the possible Low Resolution SCC L1 Product global
1825 attributes are reported. There are some global attributes that are
1826 mandatory and have to be present in all the Low Resolution SCC L1
1827 Product files while there are others that have to be present only in
1828 specific cases.
1829
1830 1. Attribute name: *Location*
1831
1832 Type: *string*
1833
1834 Location: Included in all the Low Resolution SCC L1 Product files
1835
1836 Description: the name of site where the measurements have been performed
1837
1838 1. Attribute name: *System*
1839
1840 Type: *string*
1841
1842 Location: Included in all the Low Resolution SCC L1 Product files
1843
1844 Description: the name of the lidar system used to perform the
1845 measurements
1846
1847 1. Attribute name: *Latitude\_degrees\_north*
1848
1849 Type: *double*
1850
1851 Location: Included in all the Low Resolution SCC L1 Product files
1852
1853 Description: the latitude (in degrees North) of the measurement site
1854
1855 1. Attribute name: *Longitude\_degrees\_east*
1856
1857 Type: *double*
1858
1859 Location: Included in all the Low Resolution SCC L1 Product files
1860
1861 Description: the longitude (in degrees East) of the measurement site
1862
1863 1. Attribute name: *Altitude\_meter\_asl*
1864
1865 Type: *double *
1866
1867 Location: Included in all the Low Resolution SCC L1 Product files
1868
1869 Description: the altitude (in m above see level) of the measurement site
1870
1871 1. Attribute name: *Measurement\_ID*
1872
1873 Type: *string*
1874
1875 Location: Included in all the Low Resolution SCC L1 Product files
1876
1877 Description: within the SCC all the measurement sessions is identified
1878 by a string called *Measurement\_ID* uniquely. This gobal attributes
1879 provides this string.
1880
1881 1. Attribute name: *Measurement\_Start\_Date*
1882
1883 Type: *string*
1884
1885 Location: Included in all the Low Resolution SCC L1 Product files
1886
1887 Description: the start date of the measurements. The format in which
1888 this date is written is specified in the gobal attribute
1889 *Measurement\_Date\_Format*.
1890
1891 1. Attribute name: *Measurement\_Date\_Format*
1892
1893 Type: *string*
1894
1895 Location: Included in all the Low Resolution SCC L1 Product files
1896
1897 Description: the format in which the global attribute
1898 *Measurement\_Start\_Date* is given.
1899
1900 1. Attribute name: *Measurement\_Start\_Time\_UT*
1901
1902 Type: *string*
1903
1904 Location: Included in all the Low Resolution SCC L1 Product files
1905
1906 Description: the start time (UT) of the measurements. The format in
1907 which this time is written is specified in the global attribute
1908 *Measurement\_Time\_Format*.
1909
1910 1. Attribute name: *Measurement\_Time\_Format*
1911
1912 Type: *string*
1913
1914 Location: Included in all the Low Resolution SCC L1 Product files
1915
1916 Description: the format in which the global attribute
1917 *Measurement\_Start\_Time\_U*\ T is given.
1918
1919 1. Attribute name: *Comments*
1920
1921 Type: *string*
1922
1923 Location: Included in all the Low Resolution SCC L1 Product files
1924
1925 Description: this string can contain comments of the measurement session
1926
1927 1. Attribute name: *Overlap\_File\_Name *
1928
1929 Type: *string*
1930
1931 Location: Included in all the Low Resolution SCC L1 Product files for
1932 which an overlap file has been submitted by the data originator.
1933
1934 Description: The name of the overlap file to use for overlap correction.
1935
1936 1. Attribute name: *LR\_File\_Name*
1937
1938 Type: *string*
1939
1940 Location: Included in all the Low Resolution SCC L1 Product files
1941 corresponding to elastic only retrieval and for which an lidar ratio
1942 profile file has been submitted by the data originator.
1943
1944 Description: The name of the lidar ratio file containing the profile of
1945 particle lidar ratio values to use as input in the elastic only
1946 retrieval.
1947
1948 1. Attribute name: *SCCPreprocessingVersion*
1949
1950 Type: *string*
1951
1952 Location: Included in all the Low Resolution SCC L1 Product files
1953
1954 Description: the version of SCC used to produce the current Low
1955 Resolution SCC L1 Product
1956
1957 1. .. rubric:: Low Resolution SCC L1 Product Filename
1958 :name: low-resolution-scc-l1-product-filename
1959
1960 The filename of the Low Resolution SCC L1 Products has the following
1961 format:
1962
1963 measurementid\_prodid.nc
1964
1965 The *measurementid* is a 12 characters alphanumeric string identifying
1966 the measurement session at which the product refers to. The
1967 *measurementid* (which is unique for a given measurement session) allows
1968 to fully trance the SCC analysis performed on the current product. This
1969 can be done because each measurement session is recorded in a SCC
1970 database using the same string. In the same database the measurement
1971 session is linked to the lidar configuration used to analyze the data
1972 (which is recorded and fully characterized in the SCC database providing
1973 all the channel details) and to a set of optical products to calculate.
1974
1975 The *prodid* is a numeric string identifying the optical product that
1976 has to be calculated by SCC (in particular ELDA module) by applying the
1977 optical retrieval algorithm on the current pre-processed L1 product.
1978
1979 Different product types are defined within the SCC. The contents of a
1980 Low Resolution SCC L1 product depends on the type of the product
1981 specified in the its filename by prodid string. In particular only the
1982 **Aerosol Related Variables **\ and\ ** Polarization related variables**
1983 specified in the section 2.2 can change depending on product type. In
1984 Tab. 3.1 are reported the product-type related variables for each
1985 optical product type.
1986
1987 To link the *prodid* string with the corresponding product type the SCC
1988 database a proper query to the SCC database should be addressed.
1989
1990 **Table 3.1:** Possible variables that can be found in the SCC L1
1991 Products for each optical product type
1992
1993 +--------------------------------------------------------------+---------------------------------------------------+
1994 | Product type | Possible variables in Low Resolution L1 Product |
1995 +--------------------------------------------------------------+---------------------------------------------------+
1996 | Extinction only | vrRN2, vrRN2nr, vrRN2fr |
1997 | | |
1998 | | vrRN2\_err, vrRN2nr\_err, vrRN2fr\_err |
1999 +--------------------------------------------------------------+---------------------------------------------------+
2000 | Elastic Backscatter | elT, elTnr, elTfr |
2001 | | |
2002 | Elastic Backscatter + Particle Linear Depolarization Ratio | elT\_err, elTnr\_err, elTfr\_err |
2003 | | |
2004 | | elPR, elPRnr, elPRfr |
2005 | | |
2006 | | elPR\_err, elPRnr\_err, elPRfr\_err |
2007 | | |
2008 | | elPT, elPTnr, elPTfr |
2009 | | |
2010 | | elPT\_err, elPTnr\_err, elPTfr\_err |
2011 +--------------------------------------------------------------+---------------------------------------------------+
2012 | Raman Backscatter | elT, elTnr, elTfr |
2013 | | |
2014 | Raman Backscatter + Particle Linear Depolarization Ratio | elT\_err, elTnr\_err, elTfr\_err |
2015 | | |
2016 | Lidar Ratio | elPR, elPRnr, elPRfr |
2017 | | |
2018 | | elPR\_err, elPRnr\_err, elPRfr\_err |
2019 | | |
2020 | | elPT, elPTnr, elPTfr |
2021 | | |
2022 | | elPT\_err, elPTnr\_err, elPTfr\_err |
2023 | | |
2024 | | vrRN2, vrRN2nr, vrRN2fr |
2025 | | |
2026 | | vrRN2\_err, vrRN2nr\_err, vrRN2fr\_err |
2027 +--------------------------------------------------------------+---------------------------------------------------+

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