Tohban Report 2016-10-19

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Tohban Reports
Start Date: 12 October 2016
End Date: 19 October 2016
Tohban: Mitsuo Oka
Tohban email: moka@ssl.berkeley.edu
Next Tohban: Mitsuo Oka
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Contents

Solar Activity

The solar activity was low, mostly B-flare activity with several C-flares. There are only two ARs on disk, and we expect to see low activity next week.

How many GOES flares occurred?

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

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

 Flares above B, C, M, X class were     13     4     0     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      7     4     0     0

There were RHESSI flares/GOES flares 87 / 25 over the time range 11-Oct-16 18-Oct-16


Memory Management

The SSR was at 0% at the end of BGS passes.

Spacecraft Status

On Thursday Oct.13, Detector 8 was turned off and Detector 9 was turned on (HV ramped up to ~3000V). Currently, Detectors 3 and 9 are recording events. The cold tips temperature have come down a little partly due to day light changes. They are currently 119.0 and 117.0 K as of 2016-10-19. The cold plates, 1 and 2 are 143.8 and 142.1 K. The battery looks good, well above 26V.

Data Gaps

There were two relatively large data gaps in addition to short (typically 300 s) data gaps.

GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
2016-10-13T14:55:00.000 -- 2016-10-13T15:15:00.000       1200.0000
2016-10-17T12:25:00.000 -- 2016-10-17T18:45:00.000       22800.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
2016-10-17T12:20:00.000 -- 2016-10-17T18:45:00.000       23100.000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
2016-10-17T12:20:00.000 -- 2016-10-18T00:00:00.000       42000.000


Detector issues

Detectors 3 and 9 are powered on, and are recording events. On Oct.17 (DOY 291), D9 rear fast threshold was raised from 0x60 to 0x90. In the following passes, it was lowered down to 0x70 and then raised back to 0x80. Currently the livetime is still low, reaching 5%.

2016-291-17:40:26 /IDPULOAD VALUE=0x90 ; was 0x60
2016-291-19:22:08 /IDPULOAD VALUE=0x70 ; was 0x90
2016-291-20:59:57 /IDPULOAD VALUE=0x80 ; was 0x70

Notes

Because there is no marginal difference between Detectors 8 and 9, the team decided to keep Detector 9 for a while.


Spacecraft Management

Decimation Normal/Vigorous
HLAT Decimation No decimation
Night time data (fronts) full-time
Night time data (rears) full-time
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation Working as expected
Detector problems? See notes above.
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