Tohban Report 2015-04-29
From RHESSI Wiki
| Tohban Reports | |
|---|---|
| Start Date: | 22 Apr 2015 |
| End Date: | 29 Apr 2015 |
| Tohban: | Nicole Duncan |
| Tohban email: | nicoleduncan@ssl.berkeley.edu |
| Next Tohban: | Nicole Duncan |
| List all reports | |
Contents |
Solar Activity
Most of this week's activity occurred early in the week, but it dropped off as the week progressed. Solar activity is currently very low, with a background GOES level of B3. There are currently 4 named regions on disk, with 3 of those set to rotate off disk within a few days. Activity is forecasted to remain quiet since there are no complex regions rotating on disk. Recommend the next tohban considers a change to Normal/Vigorous.
How many GOES flares occurred?
Flares above B, C, M, X class were 4 36 9 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 1 28 7 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 0 13 2 0
There were RHESSI flares/GOES flares 361 / 49 over the time range 21-Apr-15 28-Apr-15
Memory Management
SSR has been emptying at the end of the daily pass set.
Spacecraft Status
Spacecraft operated nominally this week.
Data Gaps
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
GAP START TIME GAP END TIME GAP (SEC)
2015-04-21T06:50:00.000 -- 2015-04-21T06:55:00.000 300.00000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
GAP START TIME GAP END TIME GAP (SEC)
2015-04-21T18:40:00.000 -- 2015-04-21T18:45:00.000 300.00000
2015-04-28T23:00:00.000 -- 2015-04-28T23:05:00.000 300.00000
Temperatures
Cold Tip Temperature 1 = 108.147K Cold Tip Temperature 2 = 106.324K Cold Plate Temperature 1 = 129.203K Cold Plate Temperature 2 = 127.842K
Temperatures came down because of day length. Today is the max day length, so temps should increase from here on out.
Detector issues
D8 rear fast counts were elevated, with a baseline of 10,000 that would jump to 100,000. This corresponded to a livetime with a baseline of 90% that would drop it to 40% during the times when the fast counts would jump to 100,000. Raising the rear fast threshold (0xA0 --> 0xB0) stabilized the fast counts to 1,000 with a livetime around 97%.
15-114-19:14:10 /IDPUTABLE8 OFFSET=REARFASTDAC 15-114-19:14:20 /IDPLOAD VALUE=0xB0 ; was 0xA0
Other notes
D8 front livetime hovered around 95% this week. Next tohban should keep an eye on it, but no action is recommended at this time.
D9 front livetime is down to 90%, and has been stably there for the past two weeks. The fast rates are just below 10,000 so still in the OK regime.
Spacecraft Management
Turned on rears during eclipse
| Decimation | Active/Vigorous |
| Night time data (fronts) | No nighttime events |
| Night time data (rears) | Taking nighttime events |
| Require extra passes? | No |
| Requirement for moving pointer? | No |
| Attenuator operation | Normal |
