PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = FIXED_LENGTH                                          
RECORD_BYTES          = 80                                                    
OBJECT                = TEXT                                                  
  INTERCHANGE_FORMAT    = ASCII                                               
  PUBLICATION_DATE      = 1999-04-26                                          
  NOTE                  = "N/A"                                               
END_OBJECT            = TEXT                                                  
                                                                              
END                                                                           
                                                                              
         Mars Global Surveyor Radio Science Team Raw Data Archive             
                            Mars Mapping Phase                                
                          (MGS-M-RSS-1-MAP-V1.0)                              
                                                                              
                               ERRATA.TXT                                     
                             26 April  1999                                   
                              R.A. Simpson                                    
                          Stanford  University                                
                                                                              
                                                                              
==============================================================================
INTRODUCTION                                                                  
==============================================================================
                                                                              
MORS_0402  This volume contains 9066071A.TDF in the TDF directory.  The file  
             spans the boundary between the Orbit Insertion and Mapping phases
             of the mission.                                                  
                                                                              
MORS_0405  90890705.ODR in the ODR contains Ka-Band data from HGA calibration 
             activities.                                                      
                                                                              
           The following files in the ODR directory have incorrect two-digit  
             years in the DSP headers.  Labels have been corrected manually.  
                                   90870932.ODR                               
                                   90871129.ODR                               
                                   90871244.ODR                               
                                   90871327.ODR                               
                                                                              
MORS_0411  The high-gain antenna (HGA) azimuth gimbal became stuck late on    
             1999/105 or early on 1999/106.  A full set of spacecraft         
             engineering data for 1999/106 was not obtained until several     
             days later.  The original engineering data are in                
             ECH/9106106A.ECH while the later version is in ECH/9106106B.ECH. 
             There are corresponding versions of the CSV files.  No           
             additional data was found for either days 105 or 107.            
                                                                              
           For several days following the HGA anomaly, radio occultations and 
             tracking were spotty.  Typically the spacecraft low-gain         
             antennas were used, the transponder was in 2-way mode, and       
             telemetry was on.