SCC Documentation: docs/file_formats/low_resolution.rst@66556ffd9f61 (annotated)

docs/file_formats/low_resolution.rst@66556ffd9f61 (annotated)

docs/file_formats/low_resolution.rst

Mon, 06 Feb 2017 14:37:16 +0200

author: Iannis <ulalume3@yahoo.com>
date: Mon, 06 Feb 2017 14:37:16 +0200
changeset 101: 66556ffd9f61
parent 99: c6855e46c311
child 102: 809a8f7f7717
permissions: -rw-r--r--

Reformating low_resoltuion

 Low Resolution SCC L1 Products
 ==============================
 .. warning::
   This section is still under development.
 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.
 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.
 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
 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
 ###################
 altitude\_resolution
     :Type: *double*
     :Dimensions: *scan\_angles*
     :Location: Included in all the Low Resolution SCC L1 Product files
     :Definition: ``double altitude_resolution(scan_angles)``
     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:
     .. math::
         H(\alpha, z)= \Delta h(\alpha)\left(z + \frac{1}{2}\right)
     where *z* is the altitude, :math:`\alpha` is the scan angle value and :math:`\Delta h` is the
     value reported by *altitude\_resolution* variable.
 range\_resolution
     :Type: *double*
     :Dimensions: *scan\_angles*
     :Location: Included in all the Low Resolution SCC L1 Product files
     :Definition: ``double range_resolution(scan_angles)``
     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:
     .. math::
             R(\alpha, z)= \Delta r(\alpha)\left(r + \frac{1}{2}\right)
     where *r* is the range, :math:`\alpha` is the scan angle value and :math:`\Delta r` is the
     value reported by *range\_resolution* variable. Altitude and range
     resolution are the same if the scan angle is zero (zenith acquisition).
 - 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.
 - 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.
 - 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.
 - 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)*.
 - 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.
 - 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.
 - 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.
 - 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.
 - 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.
 - 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
 ###############################
 - 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)
 - 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.
 - 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*).
 - 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
 #########################
 - 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.
 - 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*.
 - elTnr
 :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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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
 ##############################
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*.
 - 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*.
 - 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.
 - 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*).
 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.
 . 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
 . 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
 . 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
 . 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
 . 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
 . 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.
 . 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*.
 . 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.
 . 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*.
 . 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.
 . 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
 . 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.
 . 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.
 . 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
 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            |
 +--------------------------------------------------------------+---------------------------------------------------+

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docs/file_formats/low_resolution.rst@66556ffd9f61 (annotated)

docs/file_formats/low_resolution.rst