Tohban Report 2015-03-25
| Tohban Reports | |
|---|---|
| Start Date: | 18 Mar 2015 |
| End Date: | 25 Mar 2015 |
| Tohban: | Jim McTiernan |
| Tohban email: | jimm@ssl.berkeley.edu |
| Next Tohban: | TBD |
| List all reports | |
Solar Activity
Some activity, but not much. Some C and one M flare.
How many GOES flares occurred?
Flares above B, C, M, X class were 8 30 1 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 6 20 1 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 5 11 0 0
There were RHESSI flares/GOES flares 218 / 39 over the time range 17-Mar-15 24-Mar-15
Memory Management
Decimation was active/vigorous for the full time period. Both front and rear detectors are off during SC night, except for 4 minutes on either side. The SSR is at 30%, with all BGS passes yet to happen.
Spacecraft Status
The cold plates, 1 and 2 were at 131.1 and 129.65 K, on 2015-03-23. The solar array temperature (1) and the Cryocooler power converter temperature are consistently above thier yellow limits, at 100 and 53 C, respectively. Maybe we need a limits change
Data Gaps
VC1 Gaps GAP START TIME GAP END TIME GAP (SEC) 2015-03-19T18:20:00.000 -- 2015-03-19T18:30:00.000 600.00000 2015-03-19T23:20:00.000 -- 2015-03-19T23:25:00.000 300.00000 2015-03-21T22:40:00.000 -- 2015-03-21T22:45:00.000 300.00000
VC3 Gaps 2015-03-23T23:00:00.000 -- 2015-03-23T23:05:00.000 300.00000 2015-03-24T18:15:00.000 -- 2015-03-24T18:20:00.000 300.00000
Detector issues
Detectors 2 and 4 are unsegmented. We raised the rear fast threshold on D9 to 0xc0 on 18-mar-2015, to try to increase live time. This did not work very well; live time for D9r peaks at 20%. D8 rear also has live time decreasing each day, now D8r live time peaks at 80%.
On 20-mar-2015, we lowered the HV on D6 by 20 steps, this resulted in a live time increase for D6f from 40 to 90 %. Efforts to lower the fast threshold from 0x70 to 0x50 failed.
Other notes
Spacecraft Management
| Decimation | Active/Vigorous |
| HLAT Decimation | Rear decimation weight 6, no front decimation |
| Night time data (fronts) | +/- 4 minutes |
| Night time data (rears) | +/- 4 minutes |
| Require extra passes? | No |
| Requirement for moving pointer? | No |
| Attenuator operation | Normal |
| Detector problems? | See motes above. |