PDS_VERSION          = PDS3
RECORD_TYPE          = STREAM
OBJECT               = TEXT
PUBLICATION_DATE       = 1996-12-09
NOTE                   = "MGS RST Instrument Health Report #18 - revised"
END_OBJECT           = TEXT
END


Introductory Note
=================

     I will be traveling for the next three days, so there will be a hiatus
in daily reports from MGS RST.  Trish Priest and Joe Twicken should contact
each other directly about data needing Stanford attention or anomalies
observed.  Daily reports will resume when I return.  By the time we get to
Mapping, the reporting should be closer to seamless.

     This revision of the report distributed earlier includes Joe's
analysis of retransmitted data from the first USO Test.  Rather than have
it sit here quietly until Friday, I decided to issue a revised report.


Engineering Data
================

Engineering Data Statistical Summary from QUERY2PLOT:
First SCET: 1996-343T09:09:00.115
Last SCET:  1996-343T20:33:40.113
CHANNL    TITLE      EU      EU      EU      EU    DN  DN    DN     DN RECRDS
                    LOW    MEDIAN AVERAGE   HIGH  LOW MED  AVERAGE  HI
------ ---------- ------- ------- ------- ------- --- --- -------- --- ------
L-0200 USO_REG_V   4.0600  4.0800  4.0793  4.1000 203 204 203.9636 205  9961
L-0201 USO_OVEN_V  2.6000  2.6200  2.6216  2.6400 130 131 131.0822 132  9961
T-0315 USO_T      23.4724 24.6548 24.4539 25.2531 134 130 130.6794 128  2492

     Nominal values again.  About 91 MB were obtained.


Open Loop Data
==============

  Data Collection
  ---------------

     No new data.

  Frequency Analysis
  ------------------

     We requested retransmitted data from the USO Test on 1996/332; there
were NO missing records in the retransmitted data, which was received
Saturday.  Joe Twicken has completed his frequency analysis.  He reports
that the USO frequency estimate is unchanged, while the Allan Deviation
is much improved (as we expected):

	t (sec)		AD (retransmission)	AD (orig)

	1.6384		2.4801e-13		7.6344e-13
	3.2768		1.9737e-13		3.1894e-13
	6.5536		1.6274e-13		1.8090e-13
       26.2144		1.4078e-13		1.4131e-13

Test data were acquired at DSS 65 with 5 ksps sample rate and approximately
48 dB/Hz SNR.


Closed Loop Data
================

     No new data.