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 1998/177."
END_OBJECT            = TEXT
END


From trish@rodan.jpl.nasa.gov Fri Jun 26 03:00:33 1998
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Date: 26 Jun 98 03:07:01 -0700
From: Trish Priest <trish@rodan.jpl.nasa.gov>
Subject: Periapsis 389 Gravity
To: Sami Asmar <Sami.W.Asmar@jpl.nasa.gov>,
        Georges Balmino <balmino@pontos.cnes.fr>,
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Status: RO

Hello,

Periapsis 389 occurred at DSS 65. The station had no trouble locking up
two-way!  Yesterday, the LGA did not lock-up during the initial
acquisition sweep at the beginning of the DSS 65 track.  Usually it does
-- as it did today.  We can check it in the spacecraft telemetry.

Times of interest (all UTC ERT):

177-08:19:53  switch to LGA
177-08:24:50  receivers in lock on LGA signal TWO-way (approximate)
177-08:30:30  ISH - begin slew to NADIR
177-09:02:30  Periapsis 389
177-09:14:32  ISH - begin rollout
177-09:14:52  receiver out of lock before this time
177-09:34:32  ANS
177-09:46:23  switch back to HGA

The next gravity pass is Periapsis 392 (approximately 178-19:57 UTC ERT).

-Trish