PDS_VERSION_ID       = PDS3
RECORD_TYPE          = STREAM
OBJECT               = TEXT
PUBLICATION_DATE       = 1999-03-10
NOTE                   = "MGS RST Instrument Health Report HEA9069A.TXT"
END_OBJECT           = TEXT
END


Miscellaneous
=============

     Fixed HGA Mapping began at 02:20 UTC ERT on 9 March (DOY 068) when the
spacecraft crossed Mars' equator heading from north to south.  That event also
reset the Project's orbit number count to 1.  The previous, partial orbit had
been number 1683 since insertion in September 1997.  Orbits will henceforth be
counted from descending equator crossings (rather than periapsis).  RST will
begin a new archival raw data set effective this date.


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

   Our query for channelized spacecraft engineering data was rejected by all
three query servers.  Data Control reports that data are in the system tagged
by ERT between about 18h and 23h, but that the system shows nothing available
for day 068 when the query is made by SCET.  We are a little puzzled, since
presumably the Spacecraft Team would be interested in SCET and all of our
software has been using SCET since Launch.  The bottom line, is that we
currently have no way to monitor health of our spacecraft instrument in
anything close to real time.  We have submitted ISA Z50496.


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

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

     We have transferred the following open loop data to Stanford:

YYYY/DDD DSS        DSP        SAMP  BW   DSP  BIT  REC  RECS RECS  MAX
               START    STOP   RATE      MODE RESN  LEN       MSSG  SNR
-------- --- -------- -------- ---- ---- ---- ---- ---- ----- ---- -----
1999/068  45 18:26:35 18:45:00 5000 2000    2   12 1666  5526    0  57.0
1999/068  45 19:38:00 19:45:00 5000 2000    2   12 1666  2101    0  57.5
1999/068  45 20:22:00 20:30:00 5000 2000    2   12 1666  2401    0  56.8
1999/068  45 21:36:00 21:43:00 5000 2000    2   12 1666  2101    0  56.4
1999/068  54 23:33:00 23:40:00 5000 2000    2   12 1666  2101    0  56.1

  Anomalies
  ---------

     We will be capturing (nominally) 6 occultations per day until the end
of March.  These will occur during the real-time DSN tracking passes while
the spacecraft collects Mapping data in the Fixed HGA configuration.  We
will henceforth report only on occultations which fall within this capture
"window".

     A SPA-R initialization failure prior to the first occultation delayed
start of DSP recording.  But the egress event was fully captured, and it
contains a good surface echo.  An unknown event 2-3 minutes into the recording
left a transient ripple (frequency about 56 Hz) in the power spectrum.  A
similar ripple can be seen in the spectrum 2-3 minutes after the next egress
(20:22:00).

     The last two in the list above were ingress occultations.  Both show
hints of surface echoes, the first we have seen from ingress events.  Ingress
echoes were masked during the TMO period by both uplink rampling and carrier
suppression from telemetry).

     The egress occultation at 22:20:00 was lost when the DSP script failed.


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

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

     We have obtained the following files from OSCAR and EPIC:

                Original File Name                 Name on SOPC
                --------------------------------   ------------
          ODF:  99067O068_10S.SJO;1                9067068A.ODF
                99068O069_10S.SJO;1                9068068A.ODF


Ancillary Data
==============

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

     We have obtained the following files from the FIS:

                Original File Name                 Name on SOPC
                --------------------------------   ------------
       SAK:     mgs_solar_array_1999-067.ck        9067067A.SAK
       TCK:     mgs_spice_c_kernel_1999-067.ck     9067067A.TCK