Tohban Report 2017-03-01
| Tohban Reports | |
|---|---|
| Start Date: | 22 February 2017 |
| End Date: | 1 March 2017 |
| Tohban: | Pascal Saint-Hilaire |
| Tohban email: | pascal@ssl.berkeley.edu |
| Next Tohban: | TBD |
| List all reports | |
Solar Activity
This week was quiet, aside for two high-B flares on Sunday and Monday.
How many GOES flares occurred?
Flares above B, C, M, X class were 17 3 0 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 9 3 0 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 4 1 0 0
There were RHESSI flares/GOES flares 17 / 20 over the time range 21-Feb-17 28-Feb-17
Memory Management
Memory seems steady at ~25% at end of pass daily set.
Decimation was normal/vigorous. [Why not quiet/vigorous, so we do not decimate?]
BGS station is still in the red for downlink. Still unclear what the issue is. This means we never know when what the monitor rates are until a few days after the fact, unless we specifically ask for VC2 dumps. Perhaps we sould have them automatically while BGS is down?
Spacecraft Status
D3 and D6 are on. Cryocooler power is still at 75W.
From Nicole's notes last week: The background flux is up at 12%, and the out shutter is set to ~15%. We still have margin, but Ops suggest that we adjust this. The idea is that we will raise the thin shutter out threshold to 5% above the current deadtime, so we will raise it to ~17%. ==> I have seen almost 16% on the status page.
Data Gaps
Only VC3 data gaps of import is 2017-02-23T00:10:00.000 -- 2017-02-23T02:20:00.000 7800.0000
DATA GAPS FOR 2017/02/22
TIME RANGE: 2017-02-22T00:00:00.000 -- 2017-02-23T00:00:00.000 GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-02-22T18:35:00.000 -- 2017-02-22T22:10:00.000 12900.000 GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-02-22T18:35:00.000 -- 2017-02-22T22:05:00.000 12600.000 GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 N_GAPS 1 GAP START TIME GAP END TIME GAP (SEC) 2017-02-22T06:05:00.000 -- 2017-02-22T06:15:00.000 600.00000
DATA GAPS FOR 2017/02/23
TIME RANGE: 2017-02-23T00:00:00.000 -- 2017-02-24T00:00:00.000
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 3
GAP START TIME GAP END TIME GAP (SEC)
2017-02-23T00:00:00.000 -- 2017-02-23T00:05:00.000 300.00000
2017-02-23T00:10:00.000 -- 2017-02-23T02:20:00.000 7800.0000 !!!!!!!!!!!!!!!!!!!!!!!!!!
2017-02-23T16:25:00.000 -- 2017-02-23T16:30:00.000 300.00000
DATA GAPS FOR 2017/02/24
TIME RANGE: 2017-02-24T00:00:00.000 -- 2017-02-25T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS 2
GAP START TIME GAP END TIME GAP (SEC)
2017-02-24T14:40:00.000 -- 2017-02-24T15:10:00.000 1800.0000
2017-02-24T16:20:00.000 -- 2017-02-24T16:25:00.000 300.00000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS 1
GAP START TIME GAP END TIME GAP (SEC)
2017-02-24T17:20:00.000 -- 2017-02-24T17:35:00.000 900.00000
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)
Detector issues
D3 rear continues to have issues with Livetime dropping to 0% at times. Since we are maxed out on the threshold the only knob we have left to turn is the HV, and for the sake of keeping the front segments operating well we decided to keep the HV at the present level.
D6 front fast threshold was increased from 0x80 to 0x90 on Tuesday Feb 21
17-052-17:21:46 start idib_chg_thrshld(6,FRONT,FAST,0x90) ; was 0x80 17-052-17:22:22 start show_temps_avg 17-052-17:22:40 CP1: 152.6 K 17-052-17:22:40 CP2: 151.2 K 17-052-17:22:40 CT1: 127.9 K 17-052-17:22:40 CT2: 126.1 K 17-052-17:22:40 TST: 189.0 K 17-052-17:22:40 cp1 - ct1 = 24.61 K 17-052-17:22:40 Cryo Power: 75.4 W 17-052-17:22:40 Cryo Accel: 12.1 mG
Notes
Spacecraft Management
| Decimation | Normal/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? | Yes |
| Attenuator operation | Commanded out |
| Detector problems? | See notes above. |