Tohban Report 2017-10-04
| 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 | |
Solar Activity
Quiet, 2 C 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 |