Tohban Report 2013-01-02
| Tohban Reports | |
|---|---|
| Start Date: | 26 Dec 2012 |
| End Date: | 2 Jan 2013 |
| Tohban: | Pascal Saint-Hilaire |
| Tohban email: | shilaire@ssl.berkeley.edu |
| Next Tohban: | Juan-Carlos Martinez Oliveros |
| List all reports | |
Solar Activity
A few C-flares over Christmas, then pretty quiet. Two C-flares in the last few days. These were all produced by AR 11635, which has now rotated off the visible solar disc. There are a few current and a couple of new active regions, but they have not produced anything above a B-class flare so far. STEREO-B images show that a new ARs should appear later in the (Tohban) week.
How many GOES flares occurred?
Flares above B, C, M, X class were 22 13 0 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 12 9 0 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 9 7 0 0
There were RHESSI flares/GOES flares 185 / 35 over the time range 25-Dec-12 01-Jan-13
Memory Management
The SSR fill level has been regularly reaching 0% 1 or 2 passes before the end of the daily pass set. Hence, we plan on switching to the Normal/Vigorous decimation scheme this week, and after a day or two, to switch on rear segments at night.
Spacecraft Status
Cold Plate 2 at 107 K. More or less as expected. We are considering playing with D2 voltages in a few weeks, once the daily pass set occurs during the day, in the hope it'll segment.
Data Gaps
No data gaps of note this week. However, the large data gap reported last week: " There was a large data gap due to the Wallop station problem.
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30 GAP START TIME GAP END TIME GAP (SEC) 2012-12-20T01:10:00.000 -- 2012-12-20T04:55:00.000 13500.000
" still has no Observing Summary data generated for it. The Level-0 orbit files corresponding to these times indeed do not have proper sizes.
Jim says the VC files are corrupted and is looking into it.
Detector issues
Basically, no issues!
Detector 8: From Jeremy: "I turned on detector 8 events were finally turned on again around 2012-363-19:00 UTC. On the next orbit RHESSI flew through the SAA and there was no significant increase in the SSR fill level. We put in about 0.1 % more of the total SSR than the previous orbit, although the SAA passage ended in eclipse."
Since then, detector 8 has been very well behaved, even after SAA passage. The number of front events is perhaps 20-30% above that of other detectors (1,3,4,6,7,9), but not as "bad" as detector 5 (about 50% more events).
Detector 4: Could not find a single de-segmentation event from Dec 26 to Jan 1 or so! I believe it has been nursed back to full health.
Some other issues:
The GOES(or EVE proxy)+RHESSI plots usually accessible from the Browser appear to not being made anymore, since 2012/12/24. Will notify Albert.
| Decimation | active/vigorous |
| HLAT Decimation | Rear decimation weight 6, no front decimation |
| Night time data (fronts) | +/- 4 min |
| Night time data (rears) | +/- 4 min |
| Require extra passes? | No |
| Requirement for moving pointer? | No |
| Attenuator operation | Normal |
| Detector problems? | None |