RHESSI Tohban report,  28-Nov-2007 to 5-Dec-2007
Hugh Hudson, hhudson@ssl.berkeley.edu

1. Solar Activity

The Sun was extremely quiet.  On the 5th there was one numbered rgion, old 
cycle and nearing CMP, NOAA 10977. It actually has a sunspot. On the 5th,
some stirrings of X-ray activity may be from a new E limb region, also
an old-cycle region based on its latitude.

2. Memory Management

The SSR fill level has not been a problem. Presumably the lower background
rates resulting from the anneal are helping out.

3. Data Gaps (from summary plot survey)

< 28-Nov 20:00

4. Spacecraft Operations

David and Iain provided reports on detector performance following the 
anneal. David's general comment was that it was successful in bringing
RHESSI back to its 2005 condition - quite good! As of the 5th, the cooler
power had been reduced to 74 W and CPT2 was 92.2 with perhaps acceptable
accelerometer levels (~26 mG).

The new data show some tiny flares. Jim has changed the flare-finder program
to use images, and to work at lower energies. The results are rather
spectacular in that the logic correctly identified a microflare exactly
coincident with an SAA peak - the old code would not have done that. Since
data resumed 27-Nov, the flare-finding results are:

2-dec 12:00 10 cpspd success!      "cpspd" => 3-6 counts
2-dec 19:40 20    "" ""
2-dec 20:00 huge  " "
3-dec 08:50  8 cpspd miss, but this was an A0.6 GOES event
3-dec 13:00 10 cpspd success in the teeth of an SAA, nice work!
3-dec 17:50  8 cpspd miss 
3-dec 00:15  8 cpspd miss
3-dec 00:30 18 cpspd success
3-dec 03:40 12 cpspd success
4-dec 11:15 SAA shutter action, no false flare: success!
4-dec 19:00 20 cpspd success
4-dec 19:10 12 cpspd miss 
4-dec 20:55  4 cpspd miss (this one's at the limit of human eyeball)
5-dec 02:05  8 cpspd miss 

after this there were some big misses in the most recent data, which I 
attribute to some sort of latency probably. It is clear that the new 
scheme is succssful at the A1 level as a rule. The latency at the time
of writing is about 14 hours, so it's not exactly a real-time system.

5. Next Tohban: J. McTiernan