PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
START_TIME            = 1997-09-12T00:00:00                                   
STOP_TIME             = 1999-03-27T23:59:59                                   
DATA_SET_ID           = "MGS-M-RSS-5-SDP-V1.0"                                
INSTRUMENT_HOST_NAME  = "MARS GLOBAL SURVEYOR"                                
TARGET_NAME           = MARS                                                  
PRODUCT_ID            = "GGM0964B.PS1"                                        
^PS_DOCUMENT          = "GGM0964B.PS1"                                        
OBJECT                = PS_DOCUMENT                                           
 DOCUMENT_NAME         = "WEST HEMISPHERE GRAVITY ANOMALIES FROM MGM0964C18"  
 PUBLICATION_DATE      = 1999-10-01                                           
 DOCUMENT_TOPIC_TYPE   = "INITIAL EXPERIMENT RESULTS"                         
 INTERCHANGE_FORMAT    = BINARY                                               
 DOCUMENT_FORMAT       = "POSTSCRIPT"                                         
 FILES                 = 1                                                    
 DESCRIPTION           = "                                                    
                                                                              
    A PostScript rendition of gravity anomalies in file GGM0964A.IMG in       
    the IMG directory of this archival volume.  This file shows anomalies     
    over 180-360E longitude and 60S to 60N latitude.                          
                                                                              
    Gravity anomalies are in milligals with respect to Mars gravity model     
    MGM0964C18 evaluated to degree and order 50.  The gravity anomalies       
    are computed on a reference ellipsoid with the following constants:       
                                                                              
             GM = 0.4282838041570575e+14 m**3/s**2,                           
             semi-major axis 3397000.0 m,                                     
             1991 IAU rotation rate (7.088218081252279e-4 rad/s), and         
             inverse flattening for the ellipsoid (1/f) of 196.877360.        
                                                                              
    Details of the analysis and results can be found in the DOCUMENT          
    directory of this archival volume (see AAS99328.LBL).  Or, see            
    Lemoine et al., Paper AAS 99-328, Astrodynamics Specialist                
    Conference, Girdwood, Alaska, 16-19 August 1999.  This paper              
    describes both MGM0964C18 and an improved model, MGM0964C20.  See         
    also Smith et al., 'The Gravity Field of Mars: Results from Mars          
    Global Surveyor', Science, 286, 94-97, 1999.                              
                                                                              
    The PostScript file contains an unknown number of variable-length         
    lines of ASCII characters.  Lines are delimited by the ASCII              
    carriage-return (ASCII 13) line-feed (ASCII 10) pair.                     
                                                                              
    This is a color PostScript file; but it has been successfully printed     
    on a black and white printer.                                             
                                                                              
    PostScript is a trademark of Adobe Systems, Inc."                         
                                                                              
END_OBJECT            = PS_DOCUMENT                                           
END