PDS_VERSION_ID               = PDS3
RECORD_TYPE                  = STREAM
STANDARD_DATA_PRODUCT_ID     = HEA
DATA_SET_ID                  =  "MEX-M-MRS-1/2/3-EXT2-1488-V1.0"
PRODUCT_ID                   = "M00SUE0L1A_HEA_081871721_00.TXT"
PRODUCT_CREATION_TIME        =  2011-07-21T14:41:55.000
PRODUCER_ID                  = "SUE"
INSTRUMENT_HOST_ID           = "MEX"
OBJECT                       = TEXT
PUBLICATION_DATE               = 2008-07-09
NOTE                           = "DSN MEX Tracking Data"
END_OBJECT                   = TEXT
END


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

     This is the first report since HEA8177A.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
--- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ -----
185  63 17:35:00 17:44:00 X/XR   4  1    2 16  8260   541 8185173A.RSR  58.2
185  63 17:35:49 17:44:00 X/SR   3  1    2 16  8260   492 8185173B.RSR  39.4
185  63 18:18:00 18:37:00 X/XR   4  1    2 16  8260  1141 8185181A.RSR  32.5
185  63 18:18:00 18:37:00 X/SR   3  1    2 16  8260  1141 8185181B.RSR  39.8
187  65 17:21:00 17:40:00 X/XR   4  1    2 16  8260  1141 8187172A.RSR  49.4
187  65 17:21:00 17:40:00 X/XR   3  1    2 16  8260  1141 8187172B.RSR  34.2

     The data from day 187 appear to be good, with the footnote that the
X-Band occultation was apparently carried out with telemetry modulation on.

     The data from day 185 were captured as part of the bistatic radar (BSR)
experiment, which immediately followed egress.  During these occultations
the spacecraft was one-way and modulation was off.

     There were ground configuration problems during ingress on 2008/185.
The X-Band carrier is about 250 Hz below the center of the 2 kHz passband, the
S-RCP recording started 49 seconds later than the X-Band recording, and the
S-Band levels are very low.  Nonetheless, these data may have science value.
The ingress occultation point was about (66S, 110W).

     As the spacecraft emerged from occultation on 2008/185, the HGA began
slewing to follow the specular point.  The HGA main lobe and first side lobe
can be seen in the first 3 minutes of S-RCP egress data.  The X-Band
transmitter was not turned on until about 3 minutes after egress, so only
high order side lobes can be seen in the quick-look plots.  The X-Band carrier
is about 700 Hz below the center of the passband.  The 2 kHz egress data
would not be easy to analyze for atmosphere or ionosphere science.  The
ingress occultation point was about (67N, 59E).

     Both occultations were also captured in the 25 kHz BSR recordings, and
the egress occultation was captured at 100 kHz.  Results of quick look
processing on BSR data will be reported in a future message.