PDS_VERSION_ID               = PDS3
RECORD_TYPE                  = STREAM
STANDARD_DATA_PRODUCT_ID     = HEA
DATA_SET_ID                  =  "MEX-M-MRS-1/2/3-EXT2-1501-V1.0"
PRODUCT_ID                   = "M00SUE0L1A_HEA_082082001_00.TXT"
PRODUCT_CREATION_TIME        =  2011-07-21T16:24:54.000
PRODUCER_ID                  = "SUE"
INSTRUMENT_HOST_ID           = "MEX"
OBJECT                       = TEXT
PUBLICATION_DATE               = 2008-07-28
NOTE                           = "DSN MEX Occultation Data"
END_OBJECT                   = TEXT
END


Miscellaneous
=============

     This is the first report since HEA8207A.TXT.


Open Loop Data
==============

  Data Collection
  ---------------

     We have completed quick-look processing on the following MEX RSR open
loop radio occultation data at Stanford:

DOY DSS        RSR        BAND RSR CH KSPS BT  REC   RECS      RSR      MAX
          START    STOP         ID         RS  LEN          FILE NAME   SNR
--- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ -----
208  15 20:01:04 20:21:00 X/XR   2  1    2 16  8260  1197 8208200A.RSR  57.2
208  15 20:01:04 20:21:00 X/SR   5  1    2 16  8260  1197 8208200B.RSR  35.5

     Whereas all of the X-RCP OCI data collected during the current occultation
season at DSN antennas have been received with carrier power densities of 48-50
dB/Hz (modulation ON), the data on 2008/208 have a power density larger than
57 dB/Hz.  As a result, the analog-to-digital converter was saturated and there
are many spurs in the power spectrum.  RSSG should add 5 dB to the X-RCP
attenuation levels for future occultations (the current settings provide about
5 dB of margin when SNR is 48-50 dB/Hz).

     The bistatic radar data collected on 2008/185 had 62 dB/Hz SNR on X-RCP;
adjusting for the difference between 70- and 34-m antenna sizes leaves about
56 dB exspected for occultations received on the smaller antennas.  It is not
clear why the previous occultations have not had this SNR.  There appears to
be a spacecraft configuration error which is not turning the modulation off
prior to occultation.

     The S-Band data look good.