PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM
OBJECT                = TEXT
 PUBLICATION_DATE     = 2007-07-29
 NOTE                 = " E-mail and other messages
                          concerning MGS Radio Science on
                          or about 2000/067."
END_OBJECT            = TEXT
END


From trish@rodan.jpl.nasa.gov Wed Feb  9 15:19 PST 2000
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Date: 09 Feb 00 15:21:11 -0800
From: Trish Priest <trish@rodan.jpl.nasa.gov>
Subject: Beta-Supplement and Fixed HGA
To: Salvadore Abbate <Salvatore.F.Abbate@jpl.nasa.gov>,
        Georges Balmino <balmino@pontos.cnes.fr>,
        Pat Esposito <pesposit@mail1.jpl.nasa.gov>,
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        Alexander Konopliv <Alexander.S.Konopliv@jpl.nasa.gov>,
        Frank Lemoine <flemoine@ares.gsfc.nasa.gov>,
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        David Smith <dsmith@ltpsun.gsfc.nasa.gov>,
        Tim Smith <tsmith@godzilla.jpl.nasa.gov>,
        Joe Twicken <joe@neptune.stanford.edu>,
        Len Tyler <len@nova.stanford.edu>,
        "Dah-Ning Yuan" <Dah-Ning.Yuan@jpl.nasa.gov>,
        Maria Zuber <zuber@tharsis.gsfc.nasa.gov>
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Hello,

As you probably know, the beta-supplement mode of operations began during
the Madrid pass on Monday morning (038/09:55:00 UTC ERT, orbit 4105).
This has two main implications for Radio Science:  (1) we will not be able
to acquire egress measurements during beta-supplement mode, and (2) there
will be approximately 16 minutes of tracking data outage during each orbit
while the HGA rewinds.

In order to obtain some egress measurements, there will be four to eight
days per month of fixed-HGA operations.  During these periods, the
spacecraft will be NADIR pointed for 12 orbits (no downlink) followed by 4 orbits
with the HGA fixed and Earth-pointed (no NADIR observations).  The
fixed-HGA mode is very similar to the previous fixed-HGA periods which occurred
both before Mapping and right after the HGA AZ gimbal anomaly.

The fixed-HGA periods for March are as follows (in UTC ERT):

066/03:35 to 066/11:35
067/11:35 to 067/19:35
068/19:35 to 069/03:35

075/11:30 to 075/19:30
076/19:30 to 077/03:30
077/03:30 to 078/11:30

I will keep you informed of future fixed-HGA periods.

-Trish

--------------------------------------------------------------------------
From rsimpson Sun Mar  5 09:27 PST 2000
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Date: Sun, 5 Mar 2000 09:27:47 -0800 (PST)
From: Dick Simpson 723-3525 <rsimpson>
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To: flemoine@ares.gsfc.nasa.gov, rsimpson
Subject: Tracking
Cc: trish@rodan.jpl.nasa.gov
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Frank:

  In case you need it in the future, you might note that we are in
te midst of a period of thin MGS tracking coverage.

  Between DSS 25 end of track 2000/065T03:35:00 and DSS 25 begin
track 2000/066T01:35:00, there is no coverage

  Between DSS 65 end of track 2000/066T13:35:00 and DSS 54 begin
track 2000/067T11:35:00, there is no coverage.

  Between DSS 25 end of track 2000/067T19:35:00 and DSS 15 begin
track 2000/068T17:35:00 there is no coverage.

  Coverage is then quite good for the next week, then there are
a couple gaps of 22 nd 24 hrs.

Dick

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Date: Sun, 5 Mar 2000 22:04:46 -0800 (PST)
From: Dick Simpson 723-3525 <rsimpson>
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To: flemoine@ares.gsfc.nasa.gov, rsimpson, trish@rodan.jpl.nasa.gov
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If I'd been thinking a little more about the big picture when I sent
you the list of tracking gaps in the next couple weeks, I would have
remembered this is when we do Fixed HGA Mapping.  So there was a
very good reason for these gaps.

--------------------------------------------------------------------------
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From: Patricia Priest <ppriest@airmail.fltops.jpl.nasa.gov>
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Orbit:     4461e
SOE:    mm018a.07.tsoe
Begin Record:  067/12:09:00
End Record:  067/12:17:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4461i
SOE:  mm018a.07.tsoe
Begin Record:  067/13:24:00
End Record:  067/13:33:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4462e
SOE:  mm018a.07.tsoe
Begin Record:  067/14:06:00
End Record:  067/14:15:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4462i
SOE:  mm018a.07.tsoe
Begin Record:  067/15:22:00
End Record:  067/15:30:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4463e
SOE:  mm018a.07.tsoe
Begin Record:  067/16:04:00
End Record:  067/16:12:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4463i
SOE:  mm018a.07.tsoe
Begin Record:  067/17:20:00
End Record:  067/17:28:00
Last Attenuation Change:
SNT:
Elevation Angle:

--------------------------------------------------------------------------
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Orbit:     4463i
SOE:   mm018a.07.tsoe
Begin Record:  067/17:20:00
End Record:  067/17:28:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4464e
SOE:  mm018a.07.tsoe
Begin Record:  067/18:01:00
End Record:  067/18:10:00
Last Attenuation Change:
SNT:
Elevation Angle:

Orbit:  4464i
SOE:  mm018a.07.tsoe
Begin Record:  067/19:17:00
End Record:  067/19:26:00
Last Attenuation Change:
SNT:
Elevation Angle:

--------------------------------------------------------------------------
From trish@rodan.jpl.nasa.gov Fri Mar 10 16:46 PST 2000
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Date: 10 Mar 00 16:48:46 -0800
From: Trish Priest <trish@rodan.jpl.nasa.gov>
Subject: DOY 060 to 070 Doppler Data Notes
To: Georges Balmino <balmino@pontos.cnes.fr>,
        Alexander Konopliv <Alexander.S.Konopliv@jpl.nasa.gov>,
        Frank Lemoine <flemoine@ares.gsfc.nasa.gov>,
        Bill Sjogren <wls@nomad.jpl.nasa.gov>,
        David Smith <dsmith@ltpsun.gsfc.nasa.gov>,
        "Dah-Ning Yuan" <Dah-Ning.Yuan@jpl.nasa.gov>,
        Maria Zuber <zuber@tharsis.gsfc.nasa.gov>
CC: Richard Simpson <rsimpson@magellan.stanford.edu>,
        Len Tyler <len@nova.stanford.edu>
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Hello,

Below are notes from the DSN Daily logs regarding MGS Doppler data, TLM,
and the closed-loop receiver.  These notes cover the period 00-060 to
00-070.  Times are in UTC ERT.

-Trish

----------------------------

061/03:17   DSS 45  Bad power supply for Block-V Receiver.  Doppler and
TLM
                       data outages.

061/16:20   DSS 65  Receiver controller problems.  Doppler and TLM
affected.

062/03:17   DSS 25  Failed to acquire TLM lock.

062/20:53   DSS 25  Maser low noise amplifier failed.  Some Doppler and
TLM
                        data were lost.

064/18:51   DSS 65  Significant closed-loop receiver problems.  DSS 15
was
                        brought up between 17:00 and 18:45 to track MGS.
                        DSS 65 was finally able to lock on the MGS signal

                        during the final two-way period.

067/13:19    DSS 54  Problems loading closed-loop receiver predicts.

--------------------------------------------------------------------------
From joe@neptune.stanford.edu Tue Apr 11 14:56 PDT 2000
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From: Joe Twicken <joe@nova.stanford.edu>
To: hinson@nova.stanford.edu, rsimpson@nova.stanford.edu,
        joe@nova.stanford.edu
Subject: RE: ODR Notice: /users/z19/procODR/01021854
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(1) There was no HGA motion compensation for these recordings

On 11-Apr-00 Joe Twicken 723-3597 wrote:
> 00671209.ODR p 54XRXER1R201 54XRXEC1XX01 54XR1EF1S101 54XR1ES1T101
> 54XR1ES1T201 54XR1ES1T301 54XR1ES1T401 54XR1ES1T501
> 00671324.ODR p 54XRXIR1R201 54XRXIC1XX01 54XR1IF1S101 54XR1IS1T101
> 54XR1IS1T201 54XR1IS1T301 54XR1IS1T401 54XR1IS1T501
> 00671406.ODR p 54XRXER1R201 54XRXEC1XX01 54XR1EF1S101 54XR1ES1T101
> 54XR1ES1T201 54XR1ES1T301 54XR1ES1T401 54XR1ES1T501
> 00671522.ODR p 54XRXIR1R201 54XRXIC1XX01 54XR1IF1S101 54XR1IS1T101
> 54XR1IS1T201 54XR1IS1T301 54XR1IS1T401 54XR1IS1T501
> 00671604.ODR p 54XRXER1R201 54XRXEC1XX01 54XR1EF1S101 54XR1ES1T101
> 54XR1ES1T201 54XR1ES1T301 54XR1ES1T401 54XR1ES1T501
> 00671720.ODR p 54XRXIR1R201 54XRXIC1XX01 54XR1IF1S101 54XR1IS1T101
> 54XR1IS1T201 54XR1IS1T301 54XR1IS1T401 54XR1IS1T501
> 0067172A.ODR p 25XRXIR1R201 25XRXIC1XX01 25XR1IF1S101 25XR1IS1T101
> 25XR1IS1T201 25XR1IS1T301 25XR1IS1T401 25XR1IS1T501
> 00671801.ODR p 25XRXER1R201 25XRXEC1XX01 25XR1EF1S101 25XR1ES1T101
> 25XR1ES1T201 25XR1ES1T301 25XR1ES1T401 25XR1ES1T501
> 00671917.ODR p 25XRXIR1R201 25XRXIC1XX01 25XR1IF1S101 25XR1IS1T101
> 25XR1IS1T201 25XR1IS1T301 25XR1IS1T401 25XR1IS1T501

--------------------------------------------------------------------------
From joe@neptune.stanford.edu Fri Sep 21 15:59 PDT 2001
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From: Joe Twicken <joe@nova.stanford.edu>
To: joe@nova.stanford.edu, rsimpson@magellan.stanford.edu,
        hinson@nova.stanford.edu
Subject: RE: ODR Notice: /users/z19/procODR/12642116
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(1) Reprocessed with Goddard (ql15) trajectory

(2) There was no HGA motion compensation for any of these recordings

On 21-Sep-01 Joe Twicken 723-3597 wrote:
> 00671209.ODR p 54XRXER1R202 54XRXEC1XX02 54XR1EF1S102 54XR1ES1T102
> 54XR1ES1T202 54XR1ES1T302 54XR1ES1T402 54XR1ES1T502
> 00671324.ODR p 54XRXIR1R202 54XRXIC1XX02 54XR1IF1S102 54XR1IS1T102
> 54XR1IS1T202 54XR1IS1T302 54XR1IS1T402 54XR1IS1T502
> 00671406.ODR p 54XRXER1R202 54XRXEC1XX02 54XR1EF1S102 54XR1ES1T102
> 54XR1ES1T202 54XR1ES1T302 54XR1ES1T402 54XR1ES1T502
> 00671522.ODR p 54XRXIR1R202 54XRXIC1XX02 54XR1IF1S102 54XR1IS1T102
> 54XR1IS1T202 54XR1IS1T302 54XR1IS1T402 54XR1IS1T502
> 00671604.ODR p 54XRXER1R202 54XRXEC1XX02 54XR1EF1S102 54XR1ES1T102
> 54XR1ES1T202 54XR1ES1T302 54XR1ES1T402 54XR1ES1T502
> 00671720.ODR p 54XRXIR1R202 54XRXIC1XX02 54XR1IF1S102 54XR1IS1T102
> 54XR1IS1T202 54XR1IS1T302 54XR1IS1T402 54XR1IS1T502
> 0067172A.ODR p 25XRXIR1R202 25XRXIC1XX02 25XR1IF1S102 25XR1IS1T102
> 25XR1IS1T202 25XR1IS1T302 25XR1IS1T402 25XR1IS1T502
> 00671801.ODR p 25XRXER1R202 25XRXEC1XX02 25XR1EF1S102 25XR1ES1T102
> 25XR1ES1T202 25XR1ES1T302 25XR1ES1T402 25XR1ES1T502
> 00671917.ODR p 25XRXIR1R202 25XRXIC1XX02 25XR1IF1S102 25XR1IS1T102
> 25XR1IS1T202 25XR1IS1T302 25XR1IS1T402 25XR1IS1T502