Tohban Report 2017-01-04
| Tohban Reports | |
|---|---|
| Start Date: | 28 December 2016 |
| End Date: | 4 January 2017 |
| Tohban: | Jim McTiernan |
| Tohban email: | jimm@ssl.berkeley.edu |
| Next Tohban: | TBD |
| List all reports | |
Solar Activity
Quiet Sun conditions prevail:
How many GOES flares occurred?
Flares above B, C, M, X class were 12 0 0 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 1 0 0 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 1 0 0 0
There were RHESSI flares/GOES flares 2 / 12 over the time range 26-Dec-16 02-Jan-17
Memory Management
Decimation was quiet/vigorous for the full time period, with the SSR hovering at about 50% for most of the week. On 2-Jan-2017, RHESSI's ATS went IDLE, from 002-00:00 to 002-17:30 UTC. As a result SSR climbed to 76%. The SSR was reset to 0% (by restting the read pointer) at approximately 17:00 UT on 3-Jan-2017. This resulted in a data gap from approximately 23:27 on 30-Dec-2016 until approximately 15:37 on 3-Jan-2017. Detectors 3 and 9 are recording events during spacecraft day, and for 4 minutes prior to and after daylight.
Spacecraft Status
Detectors 3 and 9 are recording events. The cold tips are 128.6 and 126.2 K as of 3-Jan-2017, 17:00 UT. The cold plates, 1 and 2 are 154.3 and 155.3 K. Cryocooler power is steady at 80W, cryocooler efficiencies are in the range 0.026 to 0.0275. Cryocooler transients are frequent, resulting in a standard deviation of approximately 1 degree in the daily average cold tip temperatures. See:
http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf
for a summary plot of recent temperatures, efficiencies and accelerometer values.
It has been noted recently that the SSR has been filling at a fast rate, resulting in low-energy decimation, and the SSR staying near 50%, the value at which the decimation starts. The extra memory fill is due to low energy counts:
In the figures, the low energy count rates are much higher in 2016 than they were in 2012.
Data Gaps
DATA GAPS FOR 2016/12/26
TIME RANGE: 2016-12-26T00:00:00.000 -- 2016-12-27T00:00:00.000 GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2016-12-26T13:25:00.000 -- 2016-12-26T13:35:00.000 600.00000 NO GAPS IN APP_ID = 154 (VC1-PMTRAS) GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2016-12-26T04:50:00.000 -- 2016-12-26T06:10:00.000 4800.0000
DATA GAPS FOR 2016/12/27
TIME RANGE: 2016-12-27T00:00:00.000 -- 2016-12-28T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) NO GAPS IN APP_ID = 154 (VC1-PMTRAS) NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)
DATA GAPS FOR 2016/12/28
TIME RANGE: 2016-12-28T00:00:00.000 -- 2016-12-29T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) NO GAPS IN APP_ID = 154 (VC1-PMTRAS) NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)
DATA GAPS FOR 2016/12/29
TIME RANGE: 2016-12-29T00:00:00.000 -- 2016-12-30T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) NO GAPS IN APP_ID = 154 (VC1-PMTRAS) GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 6 GAP START TIME GAP END TIME GAP (SEC) 2016-12-29T08:20:00.000 -- 2016-12-29T08:30:00.000 600.00000 2016-12-29T13:10:00.000 -- 2016-12-29T16:40:00.000 12600.000 2016-12-29T17:25:00.000 -- 2016-12-29T17:40:00.000 900.00000 2016-12-29T19:15:00.000 -- 2016-12-29T19:30:00.000 900.00000 2016-12-29T22:20:00.000 -- 2016-12-29T22:25:00.000 300.00000 2016-12-29T23:35:00.000 -- 2016-12-29T23:50:00.000 900.00000
DATA GAPS FOR 2016/12/30
TIME RANGE: 2016-12-30T00:00:00.000 -- 2016-12-31T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) NO GAPS IN APP_ID = 154 (VC1-PMTRAS) GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2016-12-30T05:05:00.000 -- 2016-12-31T00:00:00.000 68100.000
DATA GAPS FOR 2016/12/31
TIME RANGE: 2016-12-31T00:00:00.000 -- 2017-01-01T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) NO GAPS IN APP_ID = 154 (VC1-PMTRAS) GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC)
2016-12-31T00:00:00.000 -- 2017-01-01T00:00:00.000 86400.000
DATA GAPS FOR 2017/01/01
TIME RANGE: 2017-01-01T00:00:00.000 -- 2017-01-02T00:00:00.000 GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30 N_GAPS 3 GAP START TIME GAP END TIME GAP (SEC) 2017-01-01T14:30:00.000 -- 2017-01-01T14:40:00.000 600.00000 2017-01-01T16:10:00.000 -- 2017-01-01T16:15:00.000 300.00000 2017-01-01T17:50:00.000 -- 2017-01-01T17:55:00.000 300.00000 GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-01-01T14:30:00.000 -- 2017-01-01T14:35:00.000 300.00000 GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-01-01T00:00:00.000 -- 2017-01-02T00:00:00.000 86400.000
DATA GAPS FOR 2017/01/02
TIME RANGE: 2017-01-02T00:00:00.000 -- 2017-01-03T00:00:00.000 NO GAPS IN APP_ID = 1 (VC1-SOH) GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-01-02T13:15:00.000 -- 2017-01-02T17:20:00.000 14700.000 GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-01-02T00:00:00.000 -- 2017-01-03T00:00:00.000 86400.000
Detector issues
Detectors 3 and 9 are powered on, and are recording events. No threshold or HV changes during the week.
Notes
Spacecraft Management
| Decimation | Quiet/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 | Working as expected |
| Detector problems? | See notes above. |