CCSD3ZF0000100000001NJPL3IF0PDSX00000001 
PDS_VERSION_ID               = PDS3                                      
/*          File Format and Length                                     */
RECORD_TYPE                  = FIXED_LENGTH
RECORD_BYTES                 = 22
FILE_RECORDS                 = 5749
DATA_SET_ID                  = "IRAS-D-FPA-3-RDR-ZOHF-MED-RES-V1.0"
DATA_SET_NAME                = "IRAS MEDIUM RESOLUTION ZODIACAL HISTORY FILE INDEX V1.0" 
^TABLE                       = "ZOHF_MED.TAB"
OBJECT                       = TABLE
 ROWS                        = 5749
 ROW_BYTES                   = 22
 INTERCHANGE_FORMAT          = ASCII 
 COLUMNS                     = 3
 DESCRIPTION                 = "This is the index file for the binary 
  version of the medium resolution Zodiacal History File datasets.
  Each record in this index file contains the starting byte and 
  the number of records for the table with the corresponding OBSERVATION_ID.  
  Using the /INDEX/SCAN.TAB table and the OBSERVATION_ID, one also can find 
  the NATIVE_START_TIME, NATIVE_STOP_TIME, ORBIT_NUMBER, SOLAR_ELONGATION, 
  SOLAR_ELONGATION_SIGMA, IRAS_CLOCK_ANGLE_START, IRAS_CLOCK_ANGLE_RANGE, 
  IRAS_CLOCK_ANGLE_RATE, IRAS_CLOCK_ANGLE_RATE_SIGMA, START_ECLIPTIC_LATITUDE,
  STOP_ECLIPTIC_LATITUDE, SOLAR_LONGITUDE, and IRAS_HCON."
 OBJECT                      = COLUMN                                         
  NAME                       = OBSERVATION_ID                                 
  UNIT                       = NONE                                           
  DESCRIPTION		     = "The observation sequence number is given in the
   form SSS.OO, where SSS denotes the IRAS Satellite Observation Plan (SOP) and
   OO denotes the observation number within a SOP. The SOP is the basic 
   time interval of operations and data acquisition during the IRAS mission,
   corresponding to the time between station passes, varying between seven
   and eight orbits (10 to 14 hours).  There were two SOP's per day or 600 
   SOP's in the entire mission (Beichman, et al. 1988).  Missing SOPs correspond
   to non-survey mode observations and include SOPs 53,54,55,56,58,200,258,259,
   260,261,262,263,264,442,594,595,596,597, and 598. Each SOP consisted of 76 
   or fewer commands (OBS) for survey observations, pointed observations, 
   calibration measurements, and other measurements, each of which was 
   designated by an OBS number.  Missing OBS numbers correspond to non-survey 
   mode observations or measurements. Julian date of observation can be 
   estimated from the SOP number by the formula JD=2445360+SSS/2."
  DATA_TYPE                  = REAL
  START_BYTE                 = 1                                              
  BYTES                      = 6                                              
  FORMAT                     = "F6.2"
 END_OBJECT                                                                   
 OBJECT                      = COLUMN                                         
  NAME                       = RECORD_START_BYTE
  UNIT			     = BYTE        
  DESCRIPTION                = "This is the starting byte for the medium 
   resolution zodiacal history file table with a given OBSERVATION_ID."
  DATA_TYPE                  = INTEGER                                        
  START_BYTE                 = 7                                              
  BYTES                      = 10                                             
  FORMAT                     = I10
 END_OBJECT                                                                   
 OBJECT                      = COLUMN                                         
  NAME                       = NUMBER_OF_RECORDS
  UNIT                       = NONE
  DESCRIPTION                = "This is the number of records in the 
   medium resolution zodiacal history file dataset for a given 
   OBSERVATION_ID.  Each record is 30 bytes in length."
  DATA_TYPE                  = INTEGER                                        
  START_BYTE                 = 17                                             
  BYTES                      = 6                                              
  FORMAT                     = I6
 END_OBJECT                                                                   
END_OBJECT                                                                    
END