Tohban Report 2018-06-20

Tohban Reports
Start Date:	13 June 2018
End Date:	20 June 2018
Tohban:	Mitsuo Oka
Tohban email:	moka@berkeley.edu
Next Tohban:	Pascal
List all reports

Solar Activity

The solar activity increased gradually from A-level to B-level, and there are now three active regions on disk. However, we still expect the sun to remain quiet for another week.

No RHESSI flares to count.

Memory Management

Detectors are off, SSR fill around at 60%

Spacecraft Status

Detectors are off, but system is not cooling due to the receiver lock and cryocooler problems. See

http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf
http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures_3days.pdf
http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures_2weeks.pdf

for summary plots of recent temperatures, efficiencies and accelerometer values. Cold tips are 153 and 152 K, cold plates are at 167 and 166 K.

Data Gaps

Data gaps of more than 300s between 2018-06-12 and 2018-06-19 are as follows:

GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30

GAP START TIME              GAP END TIME                   GAP (SEC)
2018-06-12T00:00:00.000 -- 2018-06-12T17:05:00.000       61500.000
2018-06-16T12:25:00.000 -- 2018-06-16T12:40:00.000       900.00000
2018-06-17T11:35:00.000 -- 2018-06-17T12:50:00.000       4500.0000
2018-06-17T12:55:00.000 -- 2018-06-17T13:25:00.000       1800.0000
2018-06-18T11:05:00.000 -- 2018-06-18T14:15:00.000       11400.000
2018-06-19T10:40:00.000 -- 2018-06-19T14:30:00.000       13800.000
2018-06-19T21:05:00.000 -- 2018-06-20T00:00:00.000       10500.000

GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4

GAP START TIME              GAP END TIME                   GAP (SEC)
2018-06-12T00:00:00.000 -- 2018-06-13T00:00:00.000       86400.000
2018-06-13T00:00:00.000 -- 2018-06-13T21:40:00.000       78000.000
2018-06-16T14:10:00.000 -- 2018-06-16T14:45:00.000       2100.0000
2018-06-16T15:00:00.000 -- 2018-06-16T15:15:00.000       900.00000
2018-06-17T11:35:00.000 -- 2018-06-17T17:15:00.000       20400.000
2018-06-17T17:50:00.000 -- 2018-06-17T18:30:00.000       2400.0000
2018-06-17T19:55:00.000 -- 2018-06-17T22:25:00.000       9000.0000
2018-06-18T11:05:00.000 -- 2018-06-18T22:25:00.000       40800.000
2018-06-19T11:55:00.000 -- 2018-06-20T00:00:00.000       43500.000

GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30

GAP START TIME              GAP END TIME                   GAP (SEC)
2018-06-12T00:00:00.000 -- 2018-06-13T00:00:00.000       86400.000
2018-06-13T00:00:00.000 -- 2018-06-14T00:00:00.000       86400.000
2018-06-14T00:00:00.000 -- 2018-06-15T00:00:00.000       86400.000
2018-06-15T00:00:00.000 -- 2018-06-16T00:00:00.000       86400.000
2018-06-16T00:00:00.000 -- 2018-06-17T00:00:00.000       86400.000
2018-06-17T00:00:00.000 -- 2018-06-18T00:00:00.000       86400.000
2018-06-18T00:00:00.000 -- 2018-06-19T00:00:00.000       86400.000
2018-06-19T00:00:00.000 -- 2018-06-20T00:00:00.000       86400.000

(Moitor rates are off, so the full week is a gap)

Detector issues

Detectors are off.

Spacecraft Management

2018-06-13 (Wed) Communication recovered. The cryocooler had been powered off by RTS 11. Cryocooler was turned on, ramped to 33W.

2018-06-14 (Thu) The cryocooler power increased from 33 to 42 W at 2018-165-22:51:45 UTC.

2018-06-15 (Fri) Last successful command 2018-166-22:18:35 UTC.

2018-06-16 (Sat) The receiver failed to lock.

2018-06-17 (Sun) The receiver failed to lock.

2018-06-18 (Mon) The receiver failed to lock.

2018-06-19 (Tue) The cryocooler was turned off by RTS 11, but some commands reached to the spacecraft later --> Turned on the cryocooler and ramped it to 26.5W.

Decimation	Active/Vigorous
HLAT Decimation	Rear decimation
Night time data (fronts)	plus/minus 4 minutes from daylight
Night time data (rears)	plus/minus 4 minutes from daylight
Require extra passes?	No
Requirement for moving pointer?	See above
Attenuator operation	Nominal
Ref. deadtime for Att.thresholds	35.x%
Detector problems?	See above