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 1998/162."
END_OBJECT            = TEXT
END


From trish@rodan.jpl.nasa.gov Fri Jun 12 15:42:39 1998
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Date: 12 Jun 98 15:48:45 -0700
From: Trish Priest <trish@rodan.jpl.nasa.gov>
Subject: Periapses 358 and 360 Gravity
To: Sami Asmar <Sami.W.Asmar@jpl.nasa.gov>,
        Georges Balmino <balmino@pontos.cnes.fr>,
        Paula Eshe <Paula.M.Eshe@jpl.nasa.gov>,
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Status: R

Hello,

Periapsis 358 occurred at DSS 54.  The station locked up well.  I have to
go back to the log files to find the out-of-lock times.

Times of interest (all UTC ERT):

162-07:26:16  switch to LGA
162-07:33:04  receivers in lock on LGA signal
162-07:36:53  ISH - begin slew to NADIR
162-08:08:53  Periapsis 358
162-08:20:55  ISH - begin rollout
162-          receiver out of lock before this time
162-08:40:55  ANS
162-08:52:46  switch back to HGA

Periapsis 360 was over DSS 65.

163-06:44:58  switch to LGA
163-06:50:26  receivers in lock on LGA signal
163-06:55:35  ISH - begin slew to NADIR
163-07:27:35  Periapsis 360
163-07:39:37  ISH - begin rollout
163-07:43:46  receiver out of lock before this time
163-07:59:37  ANS
163-08:04:26  receivers in lock on LGA signal
163-08:08:00  receivers out of lock
163-08:11:28  switch back to HGA

The next gravity pass is Periapsis 365 (approximately 165-17:41 UTC ERT).
There is a gap of four orbits due to the timing of the periapsis with
respect to the DSN tracking coverage.  This is the only gap larger than
two orbits for the remainder of this experiment period.  I will be
sending out a schedule which periapses will be for Radio Science through
July 8th.

-Trish