Tohban Report 2017-10-04

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Tohban Reports
Start Date: 27 September 2017
End Date: 4 October 2017
Tohban: Jim McTiernan
Tohban email: jimm@ssl.berkeley.edu
Next Tohban: TBD
List all reports



Contents

Solar Activity

Quiet, only some B flares

How many GOES flares occurred?

 Flares above B, C, M, X class were     11     2     0     0

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

 Flares above B, C, M, X class were      3     2     0     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      3     2     0     0

There were RHESSI flares/GOES flares 6 / 13 over the time range 26-Sep-17 03-Oct-17

Memory Management

Decimation was active/vigorous for the full time period, with the SSR levels between 5% and 30% for the last three days.

Spacecraft Status

Detectors 1, 3, 6, and 8 are recording events. The cold tips are 131.8 and 130.0 K as of 2-oct-2017. The cold plates, 1 and 2 are 157.6 and 156.2 K. Cryocooler power is steady at 74.3W, cryocooler efficiencies are 0.0268 and 0.0272. See:

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

for a summary plot of recent temperatures, efficiencies and accelerometer values.

Data Gaps

DATA GAPS FOR 27-sep-2017 TO 4-oct-2017

TIME RANGE: 2017-09-27T00:00:00.000 -- 2017-10-04T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-01T18:15:00.000 -- 2017-10-01T18:20:00.000       300.00000
2017-10-02T17:10:00.000 -- 2017-10-02T17:20:00.000       600.00000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-02T17:10:00.000 -- 2017-10-02T17:20:00.000       600.00000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-03T00:25:00.000 -- 2017-10-03T00:30:00.000       300.00000

Detector issues

Detectors 1, 3, 6, and 8 are powered on, and are recording events. No HV changes. On 27-sep-2017, the front fast rate threshold for detector 6 was lowered to 0x20, in an attempt to set the threshold to such a low value that individual fast rate counts would not be distinguished, thus reducing the fast rates and increasing live time. This was not successful, and the threshold was raised back to 0xFF.

Here are the command times (UTC):

2017-270-19:33:14 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:33:24 /IDPULOAD VALUE=0x80 ; was 0xFF
2017-270-19:34:03 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:34:08 /IDPULOAD VALUE=0x40
2017-270-19:34:45 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:34:50 /IDPULOAD VALUE=0x30
2017-270-19:35:30 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:35:35 /IDPULOAD VALUE=0x20
2017-270-19:36:21 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:36:29 /IDPULOAD VALUE=0x10
2017-270-19:37:30 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:37:35 /IDPULOAD VALUE=0x00
2017-270-19:38:14 /IDPUTABLE6 OFFSET=FRONTFASTDAC
2017-270-19:38:18 /IDPULOAD VALUE=0xFF


== Spacecraft Management ==
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? No
Attenuator operation Nominal
Ref. deadtime for Att.thresholds 18.x%
Detector problems? See above
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