PDS_VERSION_ID = PDS3 /*--------------------------------------------------------------------------*/ /*----- -----*/ /*----- FILE CHARACTERISTICS DATA ELEMENTS -----*/ /*----- -----*/ /*--------------------------------------------------------------------------*/ FILE_NAME = "MEX_OMEGA_NB_ORB_V1.FIT" INTERCHANGE_FORMAT = BINARY RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2880 FILE_RECORDS = 77765 /*--------------------------------------------------------------------------*/ /*----- DATA OBJECT POINTERS -----*/ /*--------------------------------------------------------------------------*/ ^MAIN_HEADER = ("MEX_OMEGA_NB_ORB_V1.FIT",1) ^NB_ORB_ARRAY = ("MEX_OMEGA_NB_ORB_V1.FIT",5761) ^DIMENSIONS_AND_AXES_HEADER = ("MEX_OMEGA_NB_ORB_V1.FIT",223954561) ^DIMENSIONS_AXES_COLLECTION = ("MEX_OMEGA_NB_ORB_V1.FIT",223957441) /*--------------------------------------------------------------------------*/ /*----- INSTRUMENT AND DETECTOR DESCRIPTIVE DATA ELEMENTS -----*/ /*--------------------------------------------------------------------------*/ CHANNEL_ID = IR /*--------------------------------------------------------------------------*/ /*----- IDENTIFICATION DATA ELEMENTS -----*/ /*--------------------------------------------------------------------------*/ PRODUCT_ID = "MEX_OMEGA_NB_ORB_V1.FIT" PRODUCT_TYPE = DDR PRODUCT_CREATION_TIME = 2024-02-28 STANDARD_DATA_PRODUCT_ID = IR DISTRIBUTION_TYPE = DATA RELEASE_ID = "0001" REVISION_ID = 0000 DATA_SET_ID = "MEX-M-OMEGA-5-DDR-H2OCLOUDS-MAPS-V1.0" DATA_SET_NAME = "MEX-M-OMEGA-5-DDR-H2OCLOUDS-MAPS-V1.0" ORBIT_NUMBER = 0 START_TIME = 2004-01-14T00:23:22.030 STOP_TIME = 2014-04-27T11:29:43.086 SPACECRAFT_CLOCK_START_COUNT = "22054259.22282" SPACECRAFT_CLOCK_STOP_COUNT = "346612644.00830" PROCESSING_LEVEL_ID = 5 INSTRUMENT_ID = OMEGA INSTRUMENT_NAME = "OBSERVATOIRE MINERALOGIE, EAU, GLACES, ACTIVITE" INSTRUMENT_TYPE = "IMAGING SPECTROMETER" MISSION_ID = MEX MISSION_NAME = "MARS EXPRESS" INSTRUMENT_HOST_NAME = "MARS EXPRESS" INSTRUMENT_HOST_ID = MEX TARGET_TYPE = PLANET TARGET_NAME = "MARS" /*--------------------------------------------------------------------------*/ /*----- PDS (FITS) FILE MAIN HEADER -----*/ /*--------------------------------------------------------------------------*/ OBJECT = MAIN_HEADER BYTES = 5760 HEADER_TYPE = FITS INTERCHANGE_FORMAT = BINARY RECORDS = 2 DESCRIPTION = "This header describes the NB_ORB (Number of orbits) dataset in the FITS file and the main characteristics of the original data. Original IDL data file : Climato_IceCloudsIndex_1degLT-dmax7000.v7c.sav For each gridpoint, NB_ORB corresponds to the number of Mars Express orbits where OMEGA provided valid pixel values of the ICIR used for the calculation of the average ICIR (and derived WIC, PCP,...) The number of orbits NB_ORB can be used as a data mask. A value of 0 indicates that a gridpoint has not been observed during any orbit, i.e. corresponds to a missing ICIR value. The 2nd record of this header contains the parameters describing the NB_ORB (Number of orbits) array : the type of data (IEEE long integer, i.e. 4 bytes), the number of dimensions (4), the size of each dimension (4 byte integers, for longitude, latitude, solar longitude and local time). The number of bits of the array (exclusive of fill) is given by the following formula : Nbits = |BITPIX| x (NAXIS1xNAXIS2xNAXIS3xNAXIS4) (with BITPIX = number of bits per array element)" END_OBJECT = MAIN_HEADER /*--------------------------------------------------------------------------*/ /*----- DEFINITION OF THE NUMBER OF ORBITS (NB_ORB) STRUCTURE ------*/ /*--------------------------------------------------------------------------*/ OBJECT = NB_ORB_ARRAY NAME = "NB_ORB" DESCRIPTION = "Number of Orbits" INTERCHANGE_FORMAT = BINARY AXES = 4 AXIS_ITEMS = (360, 180, 72, 24) OBJECT = ELEMENT DATA_TYPE = INTEGER BYTES = 2 NAME = "NB_ORB" UNIT = "N/A" DESCRIPTION = "NUMBER OF ORBITS" END_OBJECT = ELEMENT END_OBJECT = NB_ORB_ARRAY /*--------------------------------------------------------------------------*/ /*----- DEFINITION OF COMPLEMENTARY DATA (AXES) STRUCTURE -----*/ /*----- GEOPARAMS OBJECTS DEFINITION -----*/ /*--------------------------------------------------------------------------*/ OBJECT = DIMENSIONS_AND_AXES_HEADER BYTES = 2880 HEADER_TYPE = FITS INTERCHANGE_FORMAT = BINARY RECORDS = 2 DESCRIPTION = "COMPLEMENTARY DATA (AXES) STRUCTURE The first 11 lines of the header (BINTABLE) blocks indicate the structure of the complementary data. The following 12 lines (DIMENSIONS AND AXES) give a name to each dimension and the corresponding unit on each axis. The following 21 lines give the Column formats (TFORM) and Column names and data types (TTYPE) of the dimensions and axes previously mentioned. Finally the 12 lines that follow are comments describing the different complementary data elements and additional comments defining cloudy pixels. These comments are listed hereafter : struct_axes is a structure that contains ancillary data : the 4 dimensions of the data array (Longitude E (signed): NLON, Latitude N: NLAT, Solar longitude Ls: NLS and Local Time LT: NLT). For each dimension, the corresponding axis values are then stored in a 1-dimensional array (LONS, LATI, Ls and LTIM. For each temporal or spatial interval, the value corresponds to the beginning of the interval." END_OBJECT = DIMENSIONS_AND_AXES_HEADER OBJECT = DIMENSIONS_AXES_COLLECTION BYTES = 2880 DESCRIPTION = "COMPLEMENTARY DATA: DIMENSIONS AND AXES OF NB_ORB" NAME = "DIMENSIONS_AXES_COLLECTION" OBJECT = ELEMENT DATA_TYPE = INTEGER BYTES = 4 NAME = "NLON" DESCRIPTION = "Number of longitudes" END_OBJECT = ELEMENT OBJECT = ELEMENT DATA_TYPE = INTEGER BYTES = 4 NAME = "NLAT" DESCRIPTION = "Number of latitudes" END_OBJECT = ELEMENT OBJECT = ELEMENT DATA_TYPE = INTEGER BYTES = 4 NAME = "NLS" DESCRIPTION = "Number of solar longitudes (Ls)" END_OBJECT = ELEMENT OBJECT = ELEMENT DATA_TYPE = INTEGER BYTES = 4 NAME = "NLT" DESCRIPTION = "Number of local times" END_OBJECT = ELEMENT OBJECT = ARRAY NAME = "LONGITUDE AXIS" AXES = 1 AXIS_ITEMS = 360 OBJECT = ELEMENT DATA_TYPE = IEEE_REAL BYTES = 4 NAME = "LONS" UNIT = "degree" DESCRIPTION = "Longitude (-180 - 180 degree E)" END_OBJECT = ELEMENT END_OBJECT = ARRAY OBJECT = ARRAY NAME = "LATITUDE AXIS" AXES = 1 AXIS_ITEMS = 180 OBJECT = ELEMENT DATA_TYPE = IEEE_REAL BYTES = 4 NAME = "LATI" UNIT = "degree" DESCRIPTION = "Latitude (-90 - 90 degree N)" END_OBJECT = ELEMENT END_OBJECT = ARRAY OBJECT = ARRAY NAME = "SOLAR LONGITUDE AXIS (LS)" AXES = 1 AXIS_ITEMS = 72 OBJECT = ELEMENT DATA_TYPE = IEEE_REAL BYTES = 4 NAME = "LS" UNIT = "degree" DESCRIPTION = "Solar Longitude (Ls) (0 - 359 degree)" END_OBJECT = ELEMENT END_OBJECT = ARRAY OBJECT = ARRAY NAME = "LOCAL TIME (LT)" AXES = 1 AXIS_ITEMS = 24 OBJECT = ELEMENT DATA_TYPE = IEEE_REAL BYTES = 4 NAME = "LTIM" UNIT = "decimal hour (Martian)" DESCRIPTION = "Local true solar TIME (LT) (0 - 23 h)" END_OBJECT = ELEMENT END_OBJECT = ARRAY END_OBJECT = DIMENSIONS_AXES_COLLECTION END