PDS_VERSION_ID               = PDS3                                           
RECORD_TYPE                  = FIXED_LENGTH                                   
RECORD_BYTES                 = 2880                                           
FILE_RECORDS                 = 181                                            
^IMAGE                       = ("JGD75E60.IMG",1)                             
INSTRUMENT_HOST_NAME         = "MARS GLOBAL SURVEYOR"                         
TARGET_NAME                  = "MARS"                                         
INSTRUMENT_NAME              = "RADIO SCIENCE SUBSYSTEM"                      
DATA_SET_ID                  = "MGS-M-RSS-5-SDP-V1.0"                         
ORIGINAL_PRODUCT_ID          = "MGS75E.ANOMALY"                               
PRODUCT_ID                   = "JGD75E60.IMG"                                 
PRODUCT_RELEASE_DATE         = 2001-01-01                                     
DESCRIPTION                  = "                                              
                                                                              
 This file contains a digital map of the gravity anomaly derived from         
 the MGS75E model of the Mars gravity field.  Each point gives the            
 Mars gravity anomaly in milligals, which is the difference of the model      
 gravity on the geoid from the normal gravity on a reference ellipsoid        
 with semi-major-axis = 3397.0 km, GM = 42828.35796 km**3/s**2,               
 flattening = 5.079304192e-3, and rotation rate = 7.088218081e-5 rad/s.       
 The JGD75E60 gravity anomaly is computed from a truncated MGS75E             
 solution (from degree 2 up to degree 60) where 'GD' in the file name         
 indicates it is Gravity anomaly Data, and '75E' indicates the MGS75E         
 solution is used, and '60' indicates the maximum degree of the field         
 used to create the map.                                                      
                                                                              
 The map is produced by the Mars Global Surveyor Gravity Science Team         
 at JPL under the direction of William L. Sjogren.                            
                                                                              
 NB: START_ORBIT_NUMBER in keywords below is counted from Mars Orbit          
 Insertion in September 1997.  The MGS Project reset its orbit count          
 at the beginning of Mapping in early March 1999; STOP_ORBIT_NUMBER           
 includes the effect of that reset."                                          
                                                                              
START_ORBIT_NUMBER           = 202                                            
STOP_ORBIT_NUMBER            = 6983                                           
START_TIME                   = 1998-03-28T00:00:00.000                        
STOP_TIME                    = 2000-09-29T14:00:00.000                        
SOFTWARE_NAME                = "GRVMAP;V1.0"                                  
PRODUCT_CREATION_TIME        = 2001-01-01T00:00:00.000                        
PRODUCER_ID                  = "MGS GRAVSCI TEAM"                             
                                                                              
OBJECT               = IMAGE                                                  
  LINES                      = 181                                            
  LINE_SAMPLES               = 360                                            
  SAMPLE_TYPE                = "IEEE REAL"                                    
  SAMPLE_BITS                = 64                                             
  UNIT                       = "MILLIGALS"                                    
  OFFSET                     = 0.0E+00                                        
  SCALING_FACTOR             = 1.0E+00                                        
  DESCRIPTION                = "The Digital Map contains                      
   values of the gravity anomaly.  The values can be obtained                 
   by multiplying the sample in the map by SCALING_FACTOR                     
   and then adding OFFSET.  One milligal equals 0.01 mm/s/s."                 
END_OBJECT           = IMAGE                                                  
                                                                              
OBJECT               = IMAGE_MAP_PROJECTION                                   
  ^DATA_SET_MAP_PROJECTION     = "DSMAP2.CAT"                                 
  COORDINATE_SYSTEM_TYPE       = "BODY-FIXED ROTATING"                        
  COORDINATE_SYSTEM_NAME       = PLANETOCENTRIC                               
  MAP_PROJECTION_TYPE          = "SIMPLE CYLINDRICAL"                         
  A_AXIS_RADIUS                = 3397.0 <KM>                                  
  B_AXIS_RADIUS                = 3397.0 <KM>                                  
  C_AXIS_RADIUS                = 3397.0 <KM>                                  
  FIRST_STANDARD_PARALLEL      = "N/A"                                        
  SECOND_STANDARD_PARALLEL     = "N/A"                                        
  POSITIVE_LONGITUDE_DIRECTION = "EAST"                                       
  CENTER_LATITUDE              = 0.0 <DEGREES>                                
  CENTER_LONGITUDE             = -0.5 <DEGREES>                               
  REFERENCE_LATITUDE           = 0.0 <DEGREES>                                
  REFERENCE_LONGITUDE          = 0.0 <DEGREES>                                
  LINE_FIRST_PIXEL             = 1                                            
  LINE_LAST_PIXEL              = 181                                          
  SAMPLE_FIRST_PIXEL           = 1                                            
  SAMPLE_LAST_PIXEL            = 360                                          
  MAP_PROJECTION_ROTATION      = 0.0 <DEGREES>                                
  MAP_RESOLUTION               = 1.0E+00                                      
  MAP_SCALE                    = "N/A"                                        
  MAXIMUM_LATITUDE             = 90.0 <DEGREES>                               
  MINIMUM_LATITUDE             = -90.0 <DEGREES>                              
  EASTERNMOST_LONGITUDE        = 179.0 <DEGREES>                              
  WESTERNMOST_LONGITUDE        = -180.0 <DEGREES>                             
  LINE_PROJECTION_OFFSET       = 0.0                                          
  SAMPLE_PROJECTION_OFFSET     = 0.0                                          
END_OBJECT           = IMAGE_MAP_PROJECTION                                   
                                                                              
END