PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
START_TIME           = 1999-03-17T23:49:53Z                                   
STOP_TIME            = 1999-03-17T23:50:01Z                                   
DATA_SET_ID          = "MGS-M-RSS-1-MAP-V1.0"                                 
INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR"                                 
TARGET_NAME          = MARS                                                   
^PS_DOCUMENT         = "HEA9077A.PS1"                                         
DESCRIPTION          = "                                                      
                                                                              
     This document is one PostScript file (a figure) accompanying the MGS     
     Radio Science Team daily health report (HEA9077A.TXT) for 1999-03-18.    
     'PostScript' is a trademark of Adobe Systems Incorporated."              
                                                                              
OBJECT              = PS_DOCUMENT                                             
 DOCUMENT_NAME       = "FIGURE 1 TO ACCOMPANY HEA9077A.TXT"                   
 PUBLICATION_DATE    = 1999-03-18                                             
 DOCUMENT_TOPIC_TYPE = "DAILY HEALTH REPORT"                                  
 INTERCHANGE_FORMAT  = BINARY                                                 
 DOCUMENT_FORMAT     = "POSTSCRIPT"                                           
 FILES               = 1                                                      
 DESCRIPTION         = "                                                      
                                                                              
     Caption: Anomalous signals in spectra centered on 23:49:57, only 18      
     seconds before occultation ingress.  The pair of strongest spurs drifts  
     at about 460 Hz/sec and has amplitude approximately 35 dB below the      
     carrier.  Weaker pairs of spurs drift at higher rates, approximately 2   
     and 3 times faster than the first.  There may be other spurs at 4 and    
     possibly 5 times the base rate.                                          
                                                                              
     The obliquely reflected surface echo is barely visible in the bottom     
     plot near 2000 Hz.  In the top plot it has drifted to about 1700 Hz, at  
     a rate of -37 Hz/sec, which is typical for this observing geometry.      
                                                                              
     Data are from DSS 65 on 1999/076; the DSP began recording at 23:46:00.   
     Bottom plot is 23:49:53; top plot is 23:50:01.  Curves are 512-point     
     power spectra, each representing 0.2 sec of data (no averaging).         
     Carrier frequency was at 1284 in the 2500 Hz bandwidth; carrier signal   
     to noise was 59.4 dB/Hz."                                                
                                                                              
                                                                              
END_OBJECT          = PS_DOCUMENT                                             
                                                                              
END