PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
START_TIME           = 1999-02-26T00:00:00Z                                   
STOP_TIME            = 1999-02-26T23:59:59Z                                   
DATA_SET_ID          = "MGS-M-RSS-1-MOI-V1.0"                                 
INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR"                                 
TARGET_NAME          = MARS                                                   
^PS_DOCUMENT         = "HEA9057A.PS1"                                         
DESCRIPTION          = "                                                      
                                                                              
     This document is one PostScript file (a figure) accompanying the MGS     
     Radio Science Team daily health report (HEA9057A.TXT) for 1999-02-26.    
     'PostScript' is a trademark of Adobe Systems Incorporated."              
                                                                              
OBJECT              = PS_DOCUMENT                                             
 DOCUMENT_NAME       = "FIGURE 1 TO ACCOMPANY HEA9057A.TXT"                   
 PUBLICATION_DATE    = 1999-02-26                                             
 DOCUMENT_TOPIC_TYPE = "DAILY HEALTH REPORT"                                  
 INTERCHANGE_FORMAT  = BINARY                                                 
 DOCUMENT_FORMAT     = "POSTSCRIPT"                                           
 FILES               = 1                                                      
 DESCRIPTION         = "                                                      
                                                                              
     Caption: Signal drifting to left as time increases (bottom to top)       
     is echo reflected specularly from surface in vicinity of the occultation 
     point - approximately (80S, 153E).  Illumination is from side of the HGA 
     main beam.  Spreading in spectra is due primarily to Doppler drift       
     (-35 Hz/s) of the reflecting region and not to dispersion by surface     
     roughness.  Incidence and reflection angles range from about 89.8 deg    
     (lower; probably limited by shadowing) to about 89.6 deg (upper; as HGA  
     illumination leaves planet).  SNR is as high as 500, suggesting that     
     these events may be common in the data set, especially as we approach    
     opposition.  Absence of spectral components near carrier (center) is     
     reassuring for those intent on extracting atmospheric parameters.        
                                                                              
     Data from DSS 65 recording beginning 1999/054-03:22:00 (orbit 1513,      
     egress occultation).  Plot is linear power (arbitrary vertical scale)    
     vs frequency.  Each trace is the incoherent sum of 10 512-point power    
     spectra.  Direct carrier signal from spacecraft has been clipped to      
     facilitate display."                                                     
                                                                              
END_OBJECT          = PS_DOCUMENT                                             
                                                                              
END