PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
START_TIME           = 2003-07-19T00:00:00                                    
STOP_TIME            = 2004-01-27T23:59:59                                    
DATA_SET_ID          = "MGS-M-RSS-1-EXT-V1.0"                                 
INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR"                                 
TARGET_NAME          = MARS                                                   
^PS_DOCUMENT         = "HEA4064A.PS1"                                         
DESCRIPTION          = "                                                      
                                                                              
   This document is a PostScript file (figure) to accompany the MGS Radio     
   Science Team daily health report (HEA4064A.TXT) for 2004-03-04.            
   'PostScript' is a trademark of Adobe Systems Incorporated."                
                                                                              
OBJECT              = PS_DOCUMENT                                             
 DOCUMENT_NAME       = "FIGURE TO ACCOMPANY HEA4064A.TXT"                     
 PUBLICATION_DATE    = 2004-03-04                                             
 DOCUMENT_TOPIC_TYPE = "DAILY HEALTH REPORT"                                  
 INTERCHANGE_FORMAT  = BINARY                                                 
 DOCUMENT_FORMAT     = "POSTSCRIPT"                                           
 FILES               = 1                                                      
 DESCRIPTION         = "                                                      
                                                                              
  Caption:                                                                    
                                                                              
  HEA4064A.PS1:  X-band (8.4 GHz) equivalent frequency of the UltraStable     
                 oscillator on Mars Global Surveyor for approximately         
                 three months on either side of a solar flare anomaly.        
                 The change in frequency beginning on 2003-10-29 correlates   
                 with an unusually intense solar burst.  Mars Odyssey 2001    
                 went into safe mode at 0745 UTC on that date.  It appears    
                 the MGS USO crystal may have been affected and that the      
                 oscillator settled in to a new reference frequency over      
                 the next approximately 5 days.  As of late December the      
                 USO frequency was once again drifting at a small positive    
                 rate.  The performance is stable and not a concern at        
                 this time.  Analysis and interpretation by Joe Twicken at    
                 Stanford University for the MGS Radio Science Team."         
                                                                              
END_OBJECT          = PS_DOCUMENT                                             
                                                                              
END