Tohban Report 2014-06-03
| Tohban Reports | |
|---|---|
| Start Date: | 28 May 2014 |
| End Date: | 03 Jun 2014 |
| Tohban: | Nicole Duncan (Vice Tohban: Ian Hannah) |
| Tohban email: | nicoleduncan@ssl.berkeley.edu |
| Next Tohban: | (Vice Tohban: ) |
| List all reports | |
Solar Activity
The sun was very quiet this past week. The big event was a small M-class flare on June 02. Note that although this flare was registered as M-class in GOES, hsi_tohban_flare_counter did not recognize an M-class event during this time period. The active region that produced this M and 2 C events, 12077, is near disk-center and will be on disk for the next week. The remaining 4 ARs on disk have had no flaring activity. There doesn't appear to be any AR's rotation on disk early this week. By later in the week, an AR should rotate on.
How many GOES flares occurred?
Flares above B, C, M, X class were 11 8 0 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 8 8 0 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 5 3 0 0
There were RHESSI flares/GOES flares 47 / 19 over the time range 27-May-14 03-Jun-14
Memory Management
The SSR is emptying at the end of the pass set.
We're still in Active/Vigorous decimation. With the reduction in solar activity, we can consider rolling back to Normal/Vigorous.
Spacecraft Status
The cold plate 1 and 2 are at 118.8 K and 117.2 K respectively.
Data Gaps
VC1 - SOH GAP START TIME GAP END TIME GAP (SEC) 2014-06-02T12:15:00.000 -- 2014-06-02T12:20:00.000 300.00000 2014-05-29T04:50:00.000 -- 2014-05-29T05:00:00.000 600.00000 2014-05-29T06:25:00.000 -- 2014-05-29T06:30:00.000 300.00000 2014-05-29T06:45:00.000 -- 2014-05-29T06:55:00.000 600.00000 2014-05-29T11:10:00.000 -- 2014-05-29T11:15:00.000 300.00000 2014-05-29T11:30:00.000 -- 2014-05-29T11:35:00.000 300.00000
Detector issues
The detectors kept evolving this week.
D1: Significant noise increase in the rear segment. Requested D1 rear fast threshold change.
D2: Same noise character as D3. Livetime decreases over a RHESSI day by as much as 10%. Could this be related to the light leak?
D3: Rear fast threshold change, to 0x75. Decision made based on high fast rates and correspondingly low livetime
D5: Front fast threshold change, to 0x60.
D9: At last week's meeting we decided to keep it at ~1000V following the HV test.
shutters: Thin shutter locked in after the M event on Jun 2. D1's noise increase was blamed. Changed shutter logic to twice on D2 and twice on D5
Other notes
Shutter locked in on Jun 2
Spacecraft Management
No operations this week
| 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 | Active |
| Detector problems? | 1, 3, 5 |