NOAA GEOS SATOPS Morning Report 11 September 2000

SATOPS MORNING REPORT September 11, 2000

POES

No change in the status of the POES spacecraft.

NOAA-14 rev 29436L at 0507z:   Batteries indicated an overcharge
condition of approximately 25.6V.  Engineers present for 0648z pass,
also from Lannion.  Bus voltage and battery temps confirmed nominal. 
On rev 29348W at 0835z, adjusted the array in an attempt to reduce the
battery voltages to within the nominal range.  At 1015z, the battery
V/T Levels were modified to Bat1= 8/11, Bat2 = 9/11, Bat3 = 8/11. 
Subsequent revs showed that batty voltages were maintained at approximately
25.6 V.  Off-line discussions hypothesize that the observed discrepancies
may be due to effects due to battery aging (only now evident since NOAA-14
is entering a full sun condition).  Further discussions to be held 
on Monday.  Some thermal limit violations were also observed, which
were expected due to the solar array movement.

NOAA-12 rev 48429W:  Wallops had some IMUX problems during this
pass, resulting in the partial loss of L5B. Only 37.5% of the expected
data from L5B received. Another recovery is not possible due to recorder
scheduling limitations.

NOAA-12 rev 48431F:  L3B received noisy from spacecraft. 
68.9% of the expected data from L3B received.  Another recovery is
not possible due to recorder scheduling limitations.

NOAA-12 rev 48439F:  L3B and L4A received noisy from spacecraft. 
98.9% of L3B and 96.0% of L4A recovered.  FCDA reports possible problem
due to inter-modulation distortion between STX1 and STX2 (12db separation).

NOAA-14 rev 29367F:  G3A received noisy from spacecraft. 
84.1% of the expected data from G3A received.  Another recovery is
not possible due to recorder scheduling limitations.

NOAA-15 AVHRR-MIRP resynchronization tests continue.  Additional
tests will be conducted for one or two revs each day through September
18 for continued engineering analysis of the AVHRR instrument.  From
0022z on Monday, September 11, the MIRP was mistakenly reconfigured into
external synch due to an errant command in the on-board command schedule. 
The configuration will remain until approximately 1400z, also on Monday. 
Minimal impacts to operational data are expected due to this testing.

POES operations were nominal over the past 72 hours.

GOES

No change in the status of the GOES spacecraft.

GOES-8 (East) Operations:

The GOES-8 Fall eclipse season occurs daily between 0414-0526Z and continues
through October 15th.  GOES-8 Images cancelled for Eclipse/KOZ – 0409,
0415, 0431, 0439, 0445, 0501, 0509, 0515, 0531, 0539, 0545z and 0615z. 
GOES-8 Soundings cancelled for Eclipse/KOZ – 0346, 0420, 0446, 0520, 0546
and 0620z.  Full disk coverage during GOES-10 KOZ: 0815Z – 1044Z.

At 1141z on Friday, September 8, a GOES-8 frame break was observed and
attributed to the IPS memory being full.

At 1554z on Saturday, September 9, a GOES-8 frame break was observed
and attributed to RFI (unknown source).

At 2009z on Saturday, September 9 , a GOES-8 frame break was observed
and attributed to address phasing error.

GOES-10 (West) Operations:

The GOES-10 Fall eclipse season occurs daily between 0816-0930Z and
continues through October 16th.  GOES-10 Images cancelled for KOZ/Eclipse:
0815, 0822, 0830, 0845, 0851, 0900, 0930, 1021 and 1030z.  GOES-10
Soundings cancelled for KOZ/Eclipse: 0801, 0824, 0901, 0924 and 1024z. 
Full disk coverage during GOES-8 eclipse 0430Z – 0629Z.

At 1650z on Friday, September 8 , a GOES-10 frame break was observed
and attributed to address phasing error.

At 0430z and 0523z on Saturday, September 9, GOES-10 frame breaks were
observed and attributed to high BER (unknown source).

At 1300z and 1315z on Saturday, September 9 , GOES-10 frame break were
observed and attributed to CRC errors.

At 1601z and 2036z on Saturday, September 9, GOES-10 frame breaks were
observed and attributed to RFI (unknown source).

At 1251z, 1300z and 1301z on Sunday, September 10, GOES-10 frame breaks
were observed and attributed to RFI (potentially due to radiosonde interference).

At 1356z, 1525z and 1908z on Sunday, September 10, GOES-10 frame breaks
were observed and attributed to RFI (unknown source).

At 1647z on Sunday, September 10, a GOES-10 frame break was observed
and attributed to high BER (unknown source).

At 0933z PCM telemetry was lost due to a problem with TACTS1. 
After troubleshooting with CDA and a failed attempt at using TACTS2, recovered
from telemetry and command problems using TACT4 at 0951z.  Manually
commanded Post eclipse configuration from auto load controller #3 CP onward. 
As a result of this problem, the 1000Z Northern Hemi image and  the
1001Z Conus Sounding were lost.

Storage Mode Spacecraft Operations:

The GOES-9 Fall eclipse season occurs daily between 0612-0724Z and continues
through October 15th.  GOES-9 remains in the Z-Axis Precession (ZAP)
storage mode.

The GOES-11 Fall eclipse season occurs daily between 0619-0732Z and
continues through October 16th.  GOES-11 remains in the Z-Axis Precession
(ZAP) storage mode.

On Friday, September 8, the GOES-11 was slewed -0.5 degrees to change
the solar torque profile in an attempt to speed up the spacecraft spin
rate.

GOES operations were nominal over the past 72 hours.

DMSP

No change in the status of the DMSP spacecraft.

DMSP operations were nominal over the past 72 hours.

Questions or comments to twalsh@nesdis.noaa.gov