Tohban Report 2015-11-11

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Tohban Reports
Start Date: 4 Nov 2015
End Date: 11 Nov 2015
Tohban: Jim McTiernan
Tohban email:
Next Tohban: TBD
List all reports


Solar Activity

Some activity, including M flares. Less activity the last couple of days: How many GOES flares occurred?

 Flares above B, C, M, X class were     11    21     4     0

And how many of these are listed in the RHESSI flare list?

 Flares above B, C, M, X class were      0    12     4     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      0     4     2     0

There were RHESSI flares/GOES flares 36 / 36 over the time range 04-Nov-15 12-Nov-15

Memory Management

Decimation was active/vigorous for the full time period. Both front and rear detectors are off during SC night, except for 4 minutes on either side. The SSR is at 34% at the end of the last BGS pass this morning.

Spacecraft Status

The cold plates, 1 and 2 were at 136.7 and 135.3 K, on 2015-11-09.

Data Gaps

VC1 Gaps GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30 GAP START TIME GAP END TIME GAP (SEC) 2015-11-08T09:30:00.000 -- 2015-11-08T09:35:00.000 300.00000 2015-11-08T11:10:00.000 -- 2015-11-08T11:25:00.000 900.00000

GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4 GAP START TIME GAP END TIME GAP (SEC) 2015-11-08T11:10:00.000 -- 2015-11-08T11:20:00.000 600.00000 2015-11-06T06:20:00.000 -- 2015-11-06T07:05:00.000 2700.0000

VC3 Gaps GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 GAP START TIME GAP END TIME GAP (SEC) 2015-11-08T02:25:00.000 -- 2015-11-08T03:55:00.000 5400.0000

Detector issues

Detector 2 is unsegmented. Detector 4 is not recording events. Detector 9 is off. Multiple fast threshold changes were made for D1 and D7 rear detectors, culminating in both D1r and D7r having rear fast thresholds of 0xFF. D7r live time has not recovered, and is currently about 5%. D1 is now at approximately 80%. On 8-nov-2015, the front fast threshold for D3 was raised to 0xF0. The was temporarily successful at raising the live time to 70%, ubt it has now dropped to 30%.

D1 and D7 live times are down to the 90-92% range, and the thin attenuator is in full time due to the low live time. The fast thresholds will be raised today o try and increase live time. Further manipulation, perhaps of the HV settings may happen today.

Other notes

Spacecraft Management

Decimation Active/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) +/- 4 minutes
Night time data (rears) +/- 4 minutes
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation Thin attenuator is in, see above
Detector problems? See notes above.
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