changeset
Documentatino for low resolution files.
Mon, 06 Feb 2017 12:57:07 +0200
- author
- Iannis <ulalume3@yahoo.com>
- date
- Mon, 06 Feb 2017 12:57:07 +0200
- changeset 97
- b468ef70d26c
- parent 96
- 2f5d5e1d416d
- child 98
- c782e3130fbc
Documentatino for low resolution files.
| docs/low_resolution | file | annotate | diff | comparison | revisions |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/low_resolution Mon Feb 06 12:57:07 2017 +0200 @@ -0,0 +1,2027 @@ +Low Resolution SCC L1 Products + +Document version: 1.0alpha + +1. .. rubric:: Introduction + :name: introduction + +The Single Calculus Chain (SCC) is the standard EARLINET tool to perform +automatic and quality nchecked analysis of raw lidar data. It is +composed by three different modules: + +- ELPP (EARLINET Lidar Pre-Processor) +- ELDA (EARLINET Lidar Data Analizer) +- ELDEC (EARLINET Lidar DEpolarization Calibrator) + +Whenever an input file containing raw lidar data has been submitted to +the SCC ELPP is automatically ran on it. The ELPP module pre-processes +the raw data performing all the corrections and data handling needed +before the optical retrieval algorithms can be applied by ELDA module. +The ELPP output files contain pre-processed range corrected signals +corrected for instrumental effects as well as atmospheric molecular +parameters calculated from standard model or radiosounding. Typically, +the vertical and temporal resolutions of the pre-processed signals +included in these files is lower than the raw vertical and temporal +resolution as in general time/vertical integration is performed by ELPP +to increase the SNR and allow the calculation of optical products with a +reduced uncertainties. As a consequence the ELPP output files are called +Low Resolution SCC L1 Products. Another SCC module (HiRELPP – High +Resolution EARLINET Lidar Pre-Processor) currently under development +will produce High Resolution SCC L1 Products in which both time and +vertical resolution are kept as higher as possible. + +This document provides a detailed description about the structure and +the format of Low Resolution SCC L1 Product as produced by the SCC v4.0. + +1. .. rubric:: Low Resolution SCC L1 Product: File format + :name: low-resolution-scc-l1-product-file-format + +The Low Resolution SCC L1 Products are files in Network Common Data Form +(NetCDF) which is a well known self-describing, machine-independent data +format that support the creation, access, and sharing of array-oriented +scientific data. For more information about NetCDF format: +http://www.unidata.ucar.edu/software/netcdf/. + +The NetCDF is a binary format that allows the definition of +multi-dimensional variables of several types (integers, double, +character, etc). For each variable it is possible to define one or more +attributes where to specify variable properties like units, long name, +description, etc. + +It is possible to define global attributes which are not related to a +specific variable but to the whole file. + +A NetCDF file is composed by four different section: + +- dimensions + + this section contains all the dimensions used in the definition of + all the variables included in the NetCDF file + +- variables + + this section contains all the variables stored in the NetCDF file. + Each variable is defined as a multi-dimensional array of a specific + type and with all the dimensions defined in the dimensions section + + global attributes + + this section lists all the attributes referring to the whole file. As + the variable the attributes (global or the one attached to a specific + variable) can be of different type + +- data + + in this section the data contained in each variable defined in + variable section is stored. Attribute values (both global or related + to a specific variable) are not reported in data section but directly + in variable or global attribute sections. + +Each Low Resolution SCC L1 Product correspond to a single emission +wavelength. For example it is possible to find in the same file the +elastic and the Raman channel pre-processed time-series corresponding to +the same emission wavelength (but to a different detection wavelengths) +but not two elastic time-series referring to different emission +wavelengths. + +1. + + 1. .. rubric:: Low Resolution SCC L1 Product Format: dimensions + :name: low-resolution-scc-l1-product-format-dimensions + +The following dimensions are defined in the Low Resolution SCC L1 +Product: + +- time +- points +- channels +- scan\_angles + +The dimension *time* specifies the number of RCS (for each channel) +composing all the pre-processed time-series reported in the file. + +The dimension *points* represents the number of rangebins characterizing +the pre-processed RCS. In case RCSs corresponding to different channels +are characterized by different rangebins the dimension time is to the +the maximum value of rangebins. + +The dimension *channels* indicates the number channels at which the RCS +time-series included in the file refer to. + +The dimension *scan\_angles* takes into account how many zenith scan +angles have been used to measure the RCS time-series reported into the +file + +1. + + 1. .. rubric:: Low Resolution SCC L1 Product Format: variables + :name: low-resolution-scc-l1-product-format-variables + +In this section all the possible Low Resolution SCC L1 Product variables +are reported. There are some variables that are mandatory and have to be +present in all the Low Resolution SCC L1 Product files while there are +others that have to be present only in specific cases. + +Technical Variables + +1. Variable name: *altitude\_resolution* + +Type: *double* + +Number of dimensions: 1 + +Dimensions: *scan\_angles* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double altitude\_resolution(scan\_angles) * + +Description: this variable describes the altitude resolution +corresponding to the RCS time-series reported in the file. It is needed +to compute the vertical scale of the RCS corresponding to each scan +angle which should be calculated as it follow: + +where *z* is the altitude, ** is the scan angle value and *h* is the +value reported by *altitude\_resolution* variable. + +1. Variable name: *range\_resolution* + +Type: *double* + +Number of dimensions: 1 + +Dimensions: *scan\_angles* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double range\_resolution(scan\_angles) * + +Description: this variable describes the range resolution corresponding +to the RCS time-series reported in the file. It is needed to compute the +range scale of the RCS corresponding to each scan angle which should be +calculated as it follow: + +where *r* is the range, ** is the scan angle value and *r* is the +value reported by *range\_resolution* variable. Altitude and range +resolution are the same if the scan angle is zero (zenith acquisition). + +1. Variable name: *laser\_pointing\_angle* + +Type: *double* + +Number of dimensions: 1 + +Dimensions: *scan\_angles* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double laser\_pointing\_angle(scan\_angles) * + +Description: this variable provides the value of the zenith scan angles +used during the measurement. The value of angle are in degrees with +respect to the zenith direction. + +1. Variable name: *emission\_wavelength* + +Type: *double* + +Number of dimensions: 1 + +Dimensions: *channels* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double emission\_wavelength(channels) * + +Description: this variable provides the value of the emission wavelength +(in nm) corresponding to each RCS time-series. + +1. Variable name: *detection\_wavelength* + +Type: *double* + +Number of dimensions: 1 + +Dimensions: *channels* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double detection\_wavelength(channels) * + +Description: this variable provides the value of the detection +wavelength (in nm) corresponding to each RCS time-series. For elastic +channels the detection and emission wavelength are the same or slightly +different. + +1. Variable name: *laser\_pointing\_angle\_of\_profiles* + +Type: *integer* + +Number of dimensions: 1 + +Dimensions: *time* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int laser\_pointing\_angle\_of\_profiles(time)* + +Description: this variable allows to identify the zenith angle at which +each single RCS contained in the time-series refer to. In particular, +for a given time the variable +*laser\_pointing\_angle\_of\_profiles(time)* provides the scan angle +index at which all the RCS included in the file refer to at the same +time. To get the value of the scan angle the variable +*laser\_pointing\_angle* should be evaluated in correspondence of the +index returned by the variable +*laser\_pointing\_angle\_of\_profiles(time)*. + +1. Variable name: *shots* + +Type: *integer* + +Number of dimensions: 1 + +Dimensions: *time* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int shots(time)* + +Description: this variable report the number of laser shots that have +been integrated the all the RCS time-series at a given time. + +1. Variable name: *start\_time* + +Type: *integer* + +Number of dimensions: 1 + +Dimensions: *time* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int start\_time(time)* + +Description: Variable reporting the value of the start time of each RCS +within all the time-series in seconds since the start of measurement. + +1. Variable name: *stop\_time* + +Type: *integer* + +Number of dimensions: 1 + +Dimensions: *time* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int stop\_time(time)* + +Description:Variables reporting the value of the stop time of each RCS +within all the time-series in seconds since the start of the +measurement. + +1. Variable name: *LR\_Input* + +Type: *integer* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present only if the Low Resolution SCC L1 Product corresponds +to an elastic only product + +NetCDF definition: *int LR\_Input* + +Description: this variable is only used by ELDA module in the elastic +only retrieval to know which value of particle lidar ratio assume in the +retrieval. A value of 1 means to use a fixed value stored in the SCC +database for each product. A value of 0 means to use a profile of lidar +ratio provided by the user as external file. + +1. Variable name: *overlap\_correction* + +Type: *integer* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int overlap\_correction * + +Description: this variable provides information on the overlap +correction of all the RCS time-series included in the file. If it is set +to 1 the overlap correction has been applied if it is set to null value +the overlap correction has not been applied. + +1. Variable name: *cloud\_flag* + +Type: *integer* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *int cloud\_flag(time, points)* + +Description: variable reporting the cloud mask on the RCS time-series +included in the file. A value of 1 means no cloud any other values +different from 1 correspond to the presence of cloud. + +Atmospheric Molecular Variables + +1. Variable name: *Elastic\_Mol\_Extinction* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *scan\_angles, points* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double Elastic\_Mol\_Extinction(scan\_angles, +points)* + +Description: this variable provides the value of molecular extinction +coefficient at elastic wavelength in m\ :sup:`-1` at a given scan angle +and altitude (points). The values are calculated from standard models or +from radiosounding (submitted to the SCC as external input files) + +1. Variable name: *LR\_Mol* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double LR\_Mol* + +Description: The value of calculated molecular lidar ratio in sr. + +1. Variable name: *Emission\_Wave\_Mol\_Trasmissivity* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *scan\_angles, points* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double +Emission\_Wave\_Mol\_Trasmissivity(scan\_angles, points)* + +Description: this variable provides the value of molecular trasmissitivy +at emission wavelength at a given scan angle and altitude (*points*). + +1. Variable name: *Detection\_Wave\_Mol\_Trasmissivity* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *scan\_angles, points* + +Location: Included in all the Low Resolution SCC L1 Product files + +NetCDF definition: *double +Detection\_Wave\_Mol\_Trasmissivity(scan\_angles, points)* + +Description: this variable provides the value of molecular trasmissitivy +at detection wavelength at a given scan angle and altitude (*points*). + +Aerosol Related Variables + +1. Variable name: *elT* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves one +single elastic channel not split in near and far range + +NetCDF definition: *double elT(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to an elastic channel. The RCS may correspond to a single +physical lidar channel or to two physical channels (one optimized for +the near range and the other for the far range) that have been glued by +ELPP module. + +1. Variable name: *elT\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves one +single elastic channel not split in near and far range + +NetCDF definition: *double elT\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elT*. + +1. Variable name: *elTnr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a near +range elastic channel + +NetCDF definition: *double elTnr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to a near range elastic channel. If this variable is +present also the corresponding *elTfr *\ variable should be present in +the file. + +1. Variable name: *elTnr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a near +range elastic channel + +NetCDF definition: *double elTnr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elTnr*. + +1. Variable name: *elTfr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a far +range elastic channel + +NetCDF definition: *double elTfr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to a far range elastic channel. If this variable is +present also the corresponding *elTnr *\ variable should be present in +the file. + +1. Variable name: *elTfr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a far +range elastic channel + +NetCDF definition: *double elTfr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elTfr*. + +1. Variable name: *vrRN2* + +Type:\ * double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves one +vibro-rotational N2 Raman channel not split in near and far range + +NetCDF definition: d\ *ouble vrRN2(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to a vibro-rotational N2 Raman channel. The RCS may +correspond to a single physical lidar channel or to two physical +channels (one optimized for the near range and the other for the far +range) that have been glued by ELPP module. + +1. Variable name: *vrRN2\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves one +vibro-rotational N2 Raman channel not split in near and far range + +NetCDF definition: *double vrRN2\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *vrRN2*. + +1. Variable name: *vrRN2nr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a near +range vibro-rotational N2 Raman channel + +NetCDF definition: *double vrRN2nr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to a near range vibro-rotationl N2 Raman. If this variable +is present also the corresponding *vrRN2fr *\ variable should be present +in the file. + +1. Variable name: *vrRN2nr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a near +range vibro-rotational N2 Raman channel + +NetCDF definition: *double vrRN2nr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *vrRN2nr*. + +1. Variable name: *vrRN2fr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a far +range vibro-rotational N2 Raman channel + +NetCDF definition: *double vrRN2fr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to a far range vibro-rotationl N2 Raman. If this variable +is present also the corresponding *vrRN2nr *\ variable should be present +in the file. + +1. Variable name: *vrRN2fr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves a far +range vibro-rotational N2 Raman channel + +NetCDF definition: *double vrRN2fr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *vrRN2fr*. + +Polarization related variables + +1. Variable name: *elPT* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels not split in near and far range + +NetCDF definition: *double elPT(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the elastic polarization component which is transmitted +by the polarization sensitive optical subsystem. This component may +correspond to a total, cross or parallel polarization component +depending on the particular system configuration. Moreover the RCS may +correspond to a single physical lidar channel or to two physical +channels (one optimized for the near range and the other for the far +range) that have been glued by ELPP module. + +1. Variable name: *elPT\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves +spolarization sensitive elastic channels not split in near and far range + +NetCDF definition: *double elPT\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPT*. + +1. Variable name: *elPTnr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double elPTnr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the near range elastic polarization component which is +transmitted by the polarization sensitive optical subsystem. This +component may correspond to a total, cross or parallel polarization +component depending on the particular system configuration. If this +variable is present also the corresponding *elPTfr* variable should be +present in the file. + +1. Variable name: *elPTnr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double elPTnr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPTnr*. + +1. Variable name: *elPTfr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double elTfr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the far range elastic polarization component which is +transmitted by the polarization sensitive optical subsystem. This +component may correspond to a total, cross or parallel polarization +component depending on the particular system configuration. If this +variable is present also the corresponding elPTnr variable should be +present in the file. + +1. Variable name: *elPTfr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double elPTfr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPTfr*. + +1. Variable name: *elPR* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels not split in near and far range + +NetCDF definition: *double elPR(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the elastic polarization component which is reflected +by the polarization sensitive optical subsystem. This component may +correspond to a total, cross or parallel polarization component +depending on the particular system configuration. Moreover the RCS may +correspond to a single physical lidar channel or to two physical +channels (one optimized for the near range and the other for the far +range) that have been glued by ELPP module. + +1. Variable name: *elPR\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels not split in near and far range + +NetCDF definition: *double elPR\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPR*. + +1. Variable name: *elPRnr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: * time, points* + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double elPTnr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the near range elastic polarization component which is +reflected by the polarization sensitive optical subsystem. This +component may correspond to a total, cross or parallel polarization +component depending on the particular system configuration. If this +variable is present also the corresponding *elPRfr* variable should be +present in the file. + +1. Variable name: *elPRnr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: * double elPRnr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPRnr*. + +1. Variable name: *elPRfr* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double elPRfr(time, points) * + +Description: this variable contains the time-series of the RCS +corresponding to the far range elastic polarization component which is +reflected by the polarization sensitive optical subsystem. This +component may correspond to a total, cross or parallel polarization +component depending on the particular system configuration. If this +variable is present also the corresponding *elPRnr* variable should be +present in the file. + +1. Variable name: *elPRfr\_err* + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *time, points* + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double elPRfr\_err(time, points) * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *elPRfr*. + +1. Variable name: *G\_T* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double G\_T * + +Description: G polarization cross-talk factor value corresponding to the +polarization transmitted channel. + +1. Variable name: *G\_T\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_T*. + +1. Variable name: *G\_T\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_T*. + +1. Variable name: *H\_T* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_T * + +Description: H polarization cross-talk factor value corresponding to the +polarization transmitted channel. + +1. Variable name: *H\_T\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_T*. + +1. Variable name: *H\_T\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_T*. + +1. Variable name: *G\_R* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double G\_R * + +Description: G polarization cross-talk factor value corresponding to the +polarization reflected channel. + +1. Variable name: *G\_R\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_R*. + +1. Variable name: *G\_R\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: * double G\_R\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_R*. + +1. Variable name: *H\_R* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_R* + +Description: H polarization cross-talk factor value corresponding to the +polarization reflected channel. + +1. Variable name: *H\_R\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_R*. + +1. Variable name: *H\_R\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_R*. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double Polarization\_Channel\_Gain\_Factor* + +Description: this variable reports the value of the gain ratio of the +reflected and transmitted polarization channels. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Statistical\_Err + * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Statistical\_Err * + +Description: this variable describes the statistical uncertainties +corresponding to the variable *Polarization\_Channel\_Gain\_Factor*. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Systematic\_Err + * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Systematic\_Err * + +Description: this variable describes the systematic uncertainties +corresponding to the variable *Polarization\_Channel\_Gain\_Factor*. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Correction * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Correction* + +Description: this variable reports the value of the correction to the +gain ratio of the reflected and transmitted polarization channels. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Statistical\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: * double +Polarization\_Channel\_Gain\_Factor\_Correction\_Statistical\_Err * + +Description: this variable describes the statistical uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Systematic\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Correction\_Systematic\_Err * + +Description: this variable describes the systematic uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction*. + +1. Variable name: *G\_T\_Near\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Near\_Range * + +Description: G polarization cross-talk factor value corresponding to the +near range polarization transmitted channel. + +1. Variable name: *G\_T\_Near\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Near\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_T\_Near\_Range*. + +1. Variable name: *G\_T\_Near\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Near\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_T\_Near\_Range*. + +1. Variable name: *H\_T\_Near\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Near\_Range * + +Description: H polarization cross-talk factor value corresponding to the +near range polarization transmitted channel. + +1. Variable name: *H\_T\_Near\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Near\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_T\_Near\_Range*. + +1. Variable name: *H\_T\_Near\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Near\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_T\_Near\_Range*. + +1. Variable name: *G\_R\_Near\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Near\_Range * + +Description: G polarization cross-talk factor value corresponding to the +near range polarization reflected channel. + +1. Variable name: *G\_R\_Near\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Near\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_R\_Near\_Range*. + +1. Variable name: *G\_R\_Near\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Near\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_R\_Near\_Range*. + +1. Variable name: *H\_R\_Near\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Near\_Range* + +Description: H polarization cross-talk factor value corresponding to the +near range polarization reflected channel. + +1. Variable name: *H\_R\_Near\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: * double H\_R\_Near\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_R\_Near\_Range*. + +1. Variable name: *H\_R\_Near\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Near\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_R\_Near\_Range*. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Near\_Range * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Near\_Range* + +Description: this variable reports the value of the gain ratio of the +near range reflected and transmitted polarization channels. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Statistical\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Statistical\_Err * + +Description: this variable describes the statistical uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Near\_Range\_Factor*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Systematic\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Near\_Range\_Systematic\_Err * + +Description: this variable describes the systematic uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Near\_Range*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range* + +Description: this variable reports the value of the correction to the +near range gain ratio of the reflected and transmitted polarization +channels. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition:\ * * + +*double +Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Statistical\_Err +* + +Description: this variable describes the statistical uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Systematic\_Err + * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves near +range polarization sensitive elastic channels + +NetCDF definition: + + *double +Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range\_Systematic\_Err +* + +Description: this variable describes the systematic uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction\_Near\_Range*. + +1. Variable name: *G\_T\_Far\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Far\_Range * + +Description: G polarization cross-talk factor value corresponding to the +far range polarization transmitted channel. + +1. Variable name: *G\_T\_Far\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Far\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_T\_Far\_Range*. + +1. Variable name: *G\_T\_Far\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_T\_Far\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_T\_Far\_Range*. + +1. Variable name: *H\_T\_Far\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Far\_Range * + +Description: H polarization cross-talk factor value corresponding to the +far range polarization transmitted channel. + +1. Variable name: *H\_T\_Far\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double H\_T\_Far\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_T\_Far\_Range*. + +1. Variable name: *H\_T\_Far\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: d\ *ouble H\_T\_Far\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_T\_Far\_Range*. + +1. Variable name: *G\_R\_Far\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Far\_Range * + +Description: G polarization cross-talk factor value corresponding to the +far range polarization reflected channel. + +1. Variable name: *G\_R\_Far\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Far\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *G\_R\_Far\_Range*. + +1. Variable name: *G\_R\_Far\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double G\_R\_Far\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *G\_R\_Far\_Range*. + +1. Variable name: *H\_R\_Far\_Range* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Far\_Range* + +Description: H polarization cross-talk factor value corresponding to the +far range polarization reflected channel. + +1. Variable name: *H\_R\_Far\_Range\_Statistical\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Far\_Range\_Statistical\_Err* + +Description: this variable describes the statistical uncertainties +corresponding to the variable *H\_R\_Far\_Range*. + +1. Variable name: *H\_R\_Far\_Range\_Systematic\_Err* + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double H\_R\_Far\_Range\_Systematic\_Err* + +Description: this variable describes the systematic uncertainties +corresponding to the variable *H\_R\_Far\_Range*. + +1. Variable name: *Polarization\_Channel\_Gain\_Factor\_Far\_Range * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Far\_Range* + +Description: this variable reports the value of the gain ratio of the +far range reflected and transmitted polarization channels. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Statistical\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Statistical\_Err * + +Description: this variable describes the statistical uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Far\_Range\_Factor*. + +1. Variable name: + P\ *olarization\_Channel\_Gain\_Factor\_Far\_Range\_Systematic\_Err * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: *double +Polarization\_Channel\_Gain\_Factor\_Far\_Range\_Systematic\_Err * + +Description: this variable describes the systematic uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Far\_Range*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: d\ *ouble +Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range* + +Description: this variable reports the value of the correction to the +far range gain ratio of the reflected and transmitted polarization +channels. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Statistical\_Err + * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: + +d\ *ouble +Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Statistical\_Err +* + +Description: this variable describes the statistical uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range*. + +1. Variable name: + *Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Systematic\_Err + * + +Type: *double* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves far +range polarization sensitive elastic channels + +NetCDF definition: + +*double +Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range\_Systematic\_Err +* + +Description: this variable describes the systematic uncertainties +corresponding to the variable +*Polarization\_Channel\_Gain\_Factor\_Correction\_Far\_Range*. + +1. Variable name: *Depolarization\_Calibration\_Type * + +Type: *integer* + +Number of dimensions: 0 + +Dimensions: N/A + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: * int Depolarization\_Calibration\_Type * + +Description: this variable describes the type of depolarization +calibration that has been performed. A value of 1 means automatic +calibration made the the SCC, a value of 2 means manual calibration +inserted into the SCC database. + +1. Variable name: *Molecular\_Linear\_Depolarization\_Ratio * + +Type: *double* + +Number of dimensions: 2 + +Dimensions: *scan\_angles,points* + +Location: Present if the Low Resolution SCC L1 Product involves +polarization sensitive elastic channels + +NetCDF definition: *double +Molecular\_Linear\_Depolarization\_Ratio(scan\_angles, points) * + +Description: this variable report the value of molecular linear +depolarization ration for at given scan angles and at given altitude +(*points*). This profile is calculated on the base of the atmospheric +data from standard models or radiosonding submitted by the user as +separate file. + +The altitude scale at which each RCS within the time-series reported by +the variables *elT, elTnr, elTfr, vrRN2, vrRN2nr, vrRN2fr, elPT, elPTnr, +elPTfr, elPR, elPRnr, elPRfr*, refer to can be obtained as: + +H(laser\_pointing\_angle\_of\_profiles(time),points) + +The total signal (*I*\ :sub:`*total*`) and the volume depolarization +ratio (**) can be calculated out of reflected (*I*\ :sub:`*R*`) and +transmitted (*I*\ :sub:`*T*`) polarization component intensities using +the following equations: + +where *\** is the gain ratio of the reflected and transmitted +polarization channels (variable *Polarization\_Channel\_Gain\_Factor*); +*K* is the correction to the gain ratio of the reflected and transmitted +polarization channels (variable +*Polarization\_Channel\_Gain\_Factor\_Correction*); *I*\ :sub:`*R*` is +the intensity of the reflected polarization component (variable *elPR*); +*I*\ :sub:`*T*` is the intensity of the transmitted polarization +component (variable *elPT*); and *G*\ :sub:`*T*`, *H*\ :sub:`*T*`, +*G*\ :sub:`*R*` and *H*\ :sub:`*R*` are the polarization cross-talk +parameters (variables *G\_T, H\_T, G\_R* and *H\_R*). + +1. + + 1. .. rubric:: Low Resolution SCC L1 Product Format: global + attributes + :name: low-resolution-scc-l1-product-format-global-attributes + +In this section all the possible Low Resolution SCC L1 Product global +attributes are reported. There are some global attributes that are +mandatory and have to be present in all the Low Resolution SCC L1 +Product files while there are others that have to be present only in +specific cases. + +1. Attribute name: *Location* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the name of site where the measurements have been performed + +1. Attribute name: *System* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the name of the lidar system used to perform the +measurements + +1. Attribute name: *Latitude\_degrees\_north* + +Type: *double* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the latitude (in degrees North) of the measurement site + +1. Attribute name: *Longitude\_degrees\_east* + +Type: *double* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the longitude (in degrees East) of the measurement site + +1. Attribute name: *Altitude\_meter\_asl* + +Type: *double * + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the altitude (in m above see level) of the measurement site + +1. Attribute name: *Measurement\_ID* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: within the SCC all the measurement sessions is identified +by a string called *Measurement\_ID* uniquely. This gobal attributes +provides this string. + +1. Attribute name: *Measurement\_Start\_Date* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the start date of the measurements. The format in which +this date is written is specified in the gobal attribute +*Measurement\_Date\_Format*. + +1. Attribute name: *Measurement\_Date\_Format* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the format in which the global attribute +*Measurement\_Start\_Date* is given. + +1. Attribute name: *Measurement\_Start\_Time\_UT* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the start time (UT) of the measurements. The format in +which this time is written is specified in the global attribute +*Measurement\_Time\_Format*. + +1. Attribute name: *Measurement\_Time\_Format* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the format in which the global attribute +*Measurement\_Start\_Time\_U*\ T is given. + +1. Attribute name: *Comments* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: this string can contain comments of the measurement session + +1. Attribute name: *Overlap\_File\_Name * + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files for +which an overlap file has been submitted by the data originator. + +Description: The name of the overlap file to use for overlap correction. + +1. Attribute name: *LR\_File\_Name* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files +corresponding to elastic only retrieval and for which an lidar ratio +profile file has been submitted by the data originator. + +Description: The name of the lidar ratio file containing the profile of +particle lidar ratio values to use as input in the elastic only +retrieval. + +1. Attribute name: *SCCPreprocessingVersion* + +Type: *string* + +Location: Included in all the Low Resolution SCC L1 Product files + +Description: the version of SCC used to produce the current Low +Resolution SCC L1 Product + +1. .. rubric:: Low Resolution SCC L1 Product Filename + :name: low-resolution-scc-l1-product-filename + +The filename of the Low Resolution SCC L1 Products has the following +format: + +measurementid\_prodid.nc + +The *measurementid* is a 12 characters alphanumeric string identifying +the measurement session at which the product refers to. The +*measurementid* (which is unique for a given measurement session) allows +to fully trance the SCC analysis performed on the current product. This +can be done because each measurement session is recorded in a SCC +database using the same string. In the same database the measurement +session is linked to the lidar configuration used to analyze the data +(which is recorded and fully characterized in the SCC database providing +all the channel details) and to a set of optical products to calculate. + +The *prodid* is a numeric string identifying the optical product that +has to be calculated by SCC (in particular ELDA module) by applying the +optical retrieval algorithm on the current pre-processed L1 product. + +Different product types are defined within the SCC. The contents of a +Low Resolution SCC L1 product depends on the type of the product +specified in the its filename by prodid string. In particular only the +**Aerosol Related Variables **\ and\ ** Polarization related variables** +specified in the section 2.2 can change depending on product type. In +Tab. 3.1 are reported the product-type related variables for each +optical product type. + +To link the *prodid* string with the corresponding product type the SCC +database a proper query to the SCC database should be addressed. + +**Table 3.1:** Possible variables that can be found in the SCC L1 +Products for each optical product type + ++--------------------------------------------------------------+---------------------------------------------------+ +| Product type | Possible variables in Low Resolution L1 Product | ++--------------------------------------------------------------+---------------------------------------------------+ +| Extinction only | vrRN2, vrRN2nr, vrRN2fr | +| | | +| | vrRN2\_err, vrRN2nr\_err, vrRN2fr\_err | ++--------------------------------------------------------------+---------------------------------------------------+ +| Elastic Backscatter | elT, elTnr, elTfr | +| | | +| Elastic Backscatter + Particle Linear Depolarization Ratio | elT\_err, elTnr\_err, elTfr\_err | +| | | +| | elPR, elPRnr, elPRfr | +| | | +| | elPR\_err, elPRnr\_err, elPRfr\_err | +| | | +| | elPT, elPTnr, elPTfr | +| | | +| | elPT\_err, elPTnr\_err, elPTfr\_err | ++--------------------------------------------------------------+---------------------------------------------------+ +| Raman Backscatter | elT, elTnr, elTfr | +| | | +| Raman Backscatter + Particle Linear Depolarization Ratio | elT\_err, elTnr\_err, elTfr\_err | +| | | +| Lidar Ratio | elPR, elPRnr, elPRfr | +| | | +| | elPR\_err, elPRnr\_err, elPRfr\_err | +| | | +| | elPT, elPTnr, elPTfr | +| | | +| | elPT\_err, elPTnr\_err, elPTfr\_err | +| | | +| | vrRN2, vrRN2nr, vrRN2fr | +| | | +| | vrRN2\_err, vrRN2nr\_err, vrRN2fr\_err | ++--------------------------------------------------------------+---------------------------------------------------+
