PDS_VERSION_ID = PDS3 /* FILE: /mariner9/m9_archive/m9uvsdr.lbl */ /* VERSION 1.0: Nov 21 2010 SIMMONS */ RECORD_TYPE = FIXED_LENGTH /* structure of 51 */ RECORD_BYTES = 1484 /*317 spec + 49 geom +annot */ FILE_RECORDS = 88057 PRODUCT_ID = "M9_REFLECTANCEDB_NOV2011.DAT" PRODUCT_NAME = "MARINER 1971 REFLECTANCE DATA" DATA_SET_ID = "MR9-M-UVS-5-SDR-V1.0" SPACECRAFT_NAME = "MARINER 9 ORBITER" INSTRUMENT_NAME = "ULTRAVIOLET SPECTROMETER" TARGET_NAME = "MARS" PRODUCT_CREATION_TIME = 2011-11-26 START_TIME = 1972-003T23:07:12.830Z STOP_TIME = 1972-071T23:28:09.307Z SPACECRAFT_CLOCK_START_COUNT = "5236458" SPACECRAFT_CLOCK_STOP_COUNT = "10141763" ^SPECTRUM ="M9_REFLECTANCEDB_NOV2011.DAT" DESCRIPTION = " This file was produced by the Mariner 9 (MM71 and M9) Ultraviolet Spectrometer (UVS) team at the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado at Boulder with funds from a NASA ROSES grant #NNX09AM04G (Data Restoration). The UVS Principle Investigator (PI) was Dr. Charles A. Barth. Refer to the Mariner 1971 UVS instrument paper 'Ultraviolet Spectrometer Experiment', Vol 60, Space Science Reviews, pages 503-530, by C.W. Hord et al, for hardware and calibration information. See the Instrument template and the Publication references for additional information. This file has been filtered to contain the most reliable set of reflectance spectra obtained during the full mission. Each of the 88057 records in this file is an IDL Structure whose parameters are shown in the IDL procedure below. The procedure was written by Ken D. Mankoff. There are 51 identities in the structure. ;;; This procedure defines the structure in the reflectance DB files. PRO reflectanceDB_struct, s ;;; This is pretty much the SEDR record (minus all G fields and a few ;;; others) plus the calculated reflectance (the first field), mu, and ;;; mu0. The logic in creating the following structure is that more ;;; information can't hurt as much as missing information. Feel free ;;; to ignore fields. s = { reflectance: FLTARR( 317 ), $ ; see mm71_reflectance.pro sample_year: 0.0 , $ ; Earth (not Mars) time sample_doy: 0.0, $ sample_hour: 0.0, $ sample_min: 0.0, $ sample_sec: 0.0, $ sample_msec: 0.0, $ DAS: 0L, $ orbit_number: 0.0, $ altitude: 0.0, $ ; units: km clock_angle: 0.0, $ cone_angle: 0.0, $ twist_angle: 0.0, $ motion_flag: 0.0, $ true_anomaly: 0.0, $ tangential_vel: 0.0, $ solar_light_angle: 0.0, $ ; mu0 = cos( ) phase_angle: 0.0, $ ; view_angle: 0.0, $ ; mu = cos( ) mu: 0.0, $ mu0: 0.0, $ latitude_F0: 0.0, $ latitude_F1: 0.0, $ latitude_F2: 0.0, $ ; slit center latitude_F3: 0.0, $ latitude_F4: 0.0, $ longitude_F0: 0.0, $ longitude_F1: 0.0, $ longitude_F2: 0.0, $ ; slit center longitude_F3: 0.0, $ longitude_F4: 0.0, $ slant_F: 0.0, $ limb_F0: 0.0, $ limb_F1: 0.0, $ limb_F2: 0.0, $ altitude_optic: 0.0, $ delta_n69: 0.0, $ angle_456: 0.0, $ slit_len_surf_F: 0.0, $ slit_len_atm_F: 0.0, $ slit_blur: 0.0, $ ra: 0.0, $ dec: 0.0, $ quality: 0.0, $ latitude_near: 0.0, $ longitude_near: 0.0, $ shadow_length: 0.0, $ shadow_height: 0.0, $ umbra: 0.0, $ gain_state: 0.0, $ annotation: BYTARR( 20 ) } END An example of using the file: IDL> openr,1,'m9_refelectanceDB_Nov2011.dat' IDL> .run reflectanceDB_struc IDL> reflectanceDB_struc, s IDL> in=assoc(1,s) IDL> rec=in[0] IDL> for ijk=0,10 do begin rec=in[ijk] & print,ijk,rec.orbit_number SOFTWARE The record format of this file is SUN OS IEEE 4-byte floating point interchange format sequential records. They are formatted, as shown above, as IDL 'Associate' 4-byte real values. QUALITY The Reflectance values in this file were derived from the original 1971-2 Mariner 9 UVS instrument F-channel spectra and calibrated by Charles Barth using calibration data from the SORCE spacecraft UV solar flux data. Barth edited the calibration to represent the 1971 time frame of the Mariner 9 data sets and then edited it further to more closely match the instrument characteristics of Mariner 9 with those of the SORCE TSI (Total Solar Intensity) instrument. This calibration file (mm71_sorce_norm3.dat) is in the Mariner 9 UVS Calibration directory. ............................................................" OBJECT = SPECTRUM INTERCHANGE_FORMAT = BINARY RECORDS = 88057 COLUMNS = 51 ROW_BYTES = 1487 ^STRUCTURE = "M9UVSDR.FMT" DESCRIPTION = " A file containing UVS spectra from the Mariner 71 orbiter. Each record contains time tags, geometry and F-channel reflectance." END_OBJECT = SPECTRUM END