Tohban Report 2017-03-01

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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



Contents

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

D6f livetime has been dropping fairly fast. F6f fast thresholds were commanded from 0x90 to 0xB0 on Feb 28th:

17-059-20:49:32 start idib_chg_thrshld(6,FRONT,FAST,0xB0)
17-059-20:49:36 /IDPUDUMPTABL TABLE=DIBTBL6
17-059-20:49:36 /IDPUTABLE6 OFFSET=FRONTFASTDAC
17-059-20:49:48 /IDPULOAD VALUE=0xB0                                 ; was 0x90
17-059-20:50:06 start show_temps_avg
17-059-20:50:24 CP1: 154.5 K
17-059-20:50:24 CP2: 153.1 K
17-059-20:50:24 CT1: 130.0 K
17-059-20:50:24 CT2: 128.2 K
17-059-20:50:24 TST: 190.0 K
17-059-20:50:24 cp1 - ct1 = 24.44 K
17-059-20:50:24 Cryo Power: 75.5 W
17-059-20:50:24 Cryo Accel: 12.1 mG 

...but it looks like we will need another increase as soon as we get monitor rate information during the above change.

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.
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