PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM
OBJECT                = TEXT
 PUBLICATION_DATE     = 2007-07-27
 NOTE                 = " E-mail and other messages
                          concerning MGS Radio Science on
                          or about 1998/231."
END_OBJECT            = TEXT
END


From trish@rodan.jpl.nasa.gov Fri Aug 21 10:26:47 1998
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Date: 21 Aug 98 10:36:27 -0700
From: Trish Priest <trish@rodan.jpl.nasa.gov>
Subject: Periapsis tracking
To: Sami Asmar <Sami.W.Asmar@jpl.nasa.gov>,
        Georges Balmino <balmino@pontos.cnes.fr>,
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Status: RO

Hello,

There is DSN tracking coverage during all of the periapses preceeding the
Phobos encounters.  The spacecraft will be in ANS during the periapsis
because the other instruments will be taking data during the encounter,
not during periapsis.

Below are the details.

-Trish
--------------------
MGS Phobos Observation #2

MGS Orbit Number:   501
Time of Previous Periapsis:  1998-08-19 16:13:22 UTC
Time of Closest Encounter:  1998-08-19 17:04:14 UTC
Distance at Closest Encounter:  1080.1 km

DOY 231 - DSS 15 tracking

-----------
MGS Phobos Observation #3

MGS Orbit Number:   526
Time of Previous Periapsis:  1998-08-31 19:06:50 UTC
Time of Closest Encounter:  1998-08-31 19:58:46 UTC
Distance at Closest Encounter:  1052.8 km

DOY 243 - DSS 15 tracking

--------------
MGS Phobos Observation #4

MGS Orbit Number:   551
Time of Previous Periapsis:  1998-09-12 21:49:26 UTC
Time of Closest Encounter:  1998-09-12 22:46:54 UTC
Distance at Closest Encounter:  350.9 km

DOY 255 - DSS 34 tracking