PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2009-02-04 D. Humm (APL) v5 to go with v5 AT CDRs; 2009-05-20 D. Humm (APL) still v5 but new filename format; 2012-03-14 F.Morgan (APL) v8 TRR3, power law normalization for aerosol, artifact spectrum" DATA_SET_ID = "MRO-M-CRISM-4-ADR-V1.0" PRODUCT_ID = "ADR90947778566_28D04_VS31L_9" /*( ADRptttttttttt_xxxxx_VSbwn_v )*/ /*( p = partition at start of validity )*/ /*( tttttttttt = sclk at start of validity )*/ /*( xxxxx = obs. ID of volcano scan TRDR )*/ /*( b = binning identifier, 0-3 )*/ /*( w = wavelength filter, 0-3 )*/ /*( n = sensor ID: S, L, or J )*/ /*( v = version )*/ PRODUCT_TYPE = ADR INSTRUMENT_HOST_NAME = "MARS RECONNAISSANCE ORBITER" SPACECRAFT_ID = MRO INSTRUMENT_NAME = "COMPACT RECONNAISSANCE IMAGING SPECTROMETER FOR MARS" INSTRUMENT_ID = CRISM TARGET_NAME = MARS START_TIME = 2010-01-12T15:48:55 STOP_TIME = NULL SPACECRAFT_CLOCK_START_COUNT = "9/0947778566" SPACECRAFT_CLOCK_STOP_COUNT = NULL OBSERVATION_TIME = NULL PRODUCT_CREATION_TIME = 2016-03-24T14:01:00.000 MRO:SENSOR_ID = "L" PRODUCT_VERSION_ID = "9" SAMPLING_MODE_ID = "MULTISPEC" MRO:WAVELENGTH_FILE_NAME = "CDR490947778566_WA0300010L_3.IMG" PIXEL_AVERAGING_WIDTH = 10 /*( pixel bin size, across track ) */ MRO:WAVELENGTH_FILTER = "1" SOURCE_PRODUCT_ID = {"FFC00028D04_01_IF254L_TRR3"} /* Atmospheric Transmission from Volcano Scan with artifact spectrum */ /* This ADR label describes one calibration data file. The file */ /* is a mutiple-band, multiple-frame image file derived from flight data. */ /* It consists of a binary image followed by a list of row numbers */ /* corresponding to the wavelength filter. */ /* The VS or volcano scan ADR was calculated by Frank Morgan */ /* of JHU/APL from CRISM observations of Olympus Mons. */ /* */ /* This level 4 ADR contains 3 lines. The first line is the atmospheric */ /* transmission spectrum at each binned detector column. Subsequent lines */ /* are artifact spectra for each column; different lines correspond to */ /* different pairs of scaling wavelengths as follows: */ /* Line 2: [2007.0,1980.0], McGuire */ /* Line 3: [2011.0,1899.0], Pelkey */ /* */ /* This VS ADR gives atmospheric transmission derived from volcano scan */ /* observation ID 28D04. */ /* */ /* Atmospheric transmission is derived by dividing spectra from the base */ /* (near 0 km elevation) by spectra from the summit (near 20 km elevation). */ /* It includes a spectral fit-based adjustment to correct an aerosol-like */ /* slope at wavelengths shortward of approximately 2.7 microns. The raw */ /* transmission is fit at wavelengths outside gas absorptions with an */ /* aerosol model with optical depth quadratic in log wavelength, then */ /* divided by that fit. */ /* The detailed shape of the 2-micron CO2 absorption in CRISM depends on */ /* pressure and temperature. The volcano scan derived transmision, */ /* combining high and low elevation spectra, differs in detail from the */ /* observed spectra being corrected. Atmospheric correction usually leaves */ /* a broad bowl-shaped depression around 2 microns as a result of the */ /* mismatch between scene and transmission spectra. A first order artifact */ /* correction can be applied by adding a multiple of an artifact spectrum */ /* from this ADR to the spectrum after initial correction. The artifact */ /* spectrum included in this ADR is derived by correcting spectra from the */ /* volcano scan base with the tranmsmission derived from the same volcano */ /* scan - essentially, correcting the volcano scan with itself. A linear */ /* interpolation between two wavelengths bracketing the 2-micron region */ /* is assumed to define the correct continuum, and the difference between */ /* continuum estimate and the actual correction is the artifact spectrum. */ /* For these artifact spectra, the interpolation wavelengths were: */ /* 1764.0,2239.0 nm */ /* Use the artifact spectrum matching the scaling wavelengths used for */ /* initial correction. */ OBJECT = FILE ^IMAGE = "ADR90947778566_28D04_VS31L_9.IMG" /* offset is in file records, which is just (imgbands*imglines) + 1 */ ^ROWNUM_TABLE = ("ADR90947778566_28D04_VS31L_9.IMG", 56 ) RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 256 /* one row now, not one frame to save space in table */ FILE_RECORDS = 166 /* compute by ROUND ((imgbands * imglines * */ /* line_samples * samplebits/8 + */ /* tablerows * tablerowbytes) / */ /* record_bytes + 0.5 ) */ OBJECT = IMAGE LINES = 3 LINE_SAMPLES = 64 SAMPLE_TYPE = PC_REAL SAMPLE_BITS = 32 BANDS = 55 BAND_NAME = NULL BAND_STORAGE_TYPE = LINE_INTERLEAVED DESCRIPTION = "Atmospheric transmission" END_OBJECT = IMAGE /* be sure to pad this object to a full record (2560/bin bytes here) */ OBJECT = ROWNUM_TABLE NAME = "SELECTED ROWS FROM DETECTOR" INTERCHANGE_FORMAT = "BINARY" ROWS = 55 COLUMNS = 1 ROW_BYTES = 2 DESCRIPTION = "The detector is subsampled in the spectral direction by selecting specific rows to be downlinked. This table provides a list of the rows selected for all frames in this multidimensional image cube." OBJECT = COLUMN NAME = DETECTOR_ROW_NUMBER DATA_TYPE = MSB_UNSIGNED_INTEGER BIT_MASK = 2#0000000111111111# START_BYTE = 1 BYTES = 2 DESCRIPTION = "Detector row number from which the data was taken." END_OBJECT = COLUMN END_OBJECT = ROWNUM_TABLE END_OBJECT = FILE END