Tohban report, 25-Oct-2005 to 31-Oct-2005
Iain Hannah, hannah@ssl.berkeley.edu

Quiet sun, but lots of activity here....

1. Solar Activity

Activity was again very low, with GOES level dropping below A1. Since AR 
10818 appeared GOES level went back above A1, currently at A4. There is 
also another region currently on the east limb and it has already produced 
a B9 flare today, so should expect this region to produce several events 
over the next week.

2. Memory Management

Memory is down to ~55%, after the SAS incident over the weekend (see
below). The SAS is still in the higher data rate since everything appears
to be normal again and we still have the extra passes. Although activity
is likely to pick up a bit this week.

3. Data Gaps

Only ones of note are from the problems over the weekend:

GAP START TIME              GAP END TIME                   GAP (SEC)
2005-10-29T19:45:00.000 -- 2005-10-29T20:55:00.000       4200.0000
2005-10-29T21:25:00.000 -- 2005-10-30T00:00:00.000       9300.0000
GAP START TIME              GAP END TIME                   GAP (SEC)
2005-10-30T14:25:00.000 -- 2005-10-31T00:00:00.000       34500.000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2005-10-30T14:25:00.000 -- 2005-10-31T00:00:00.000       34500.000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           4
GAP START TIME              GAP END TIME                   GAP (SEC)
2005-10-30T00:00:00.000 -- 2005-10-30T04:50:00.000       17400.000
2005-10-30T06:20:00.000 -- 2005-10-30T10:20:00.000       14400.000
2005-10-30T11:05:00.000 -- 2005-10-30T12:45:00.000       6000.0000
2005-10-30T16:00:00.000 -- 2005-10-31T00:00:00.000       28800.000

4. Quiet Sun Off-pointing

The offpointing began about 09:00 UT 18/10 and the commands to come back
were given at 06:10 UT 28/10. Since we noticed that the shutters came in
during the offpointing, (23-Oct-05 13:52 to 14:49 and 24-Oct-05 19:32 to
24-Oct-05 22:55), they were disabled at 09:29UT 27/10. When we came back 
to the sun the following day they were reenabled at well as decimation 
changed to normal/active and HLAT commands reintroduced.


5. SAS Things

Firstly, testing occurred to see why we weren't getting the full ccd
readout from one of the detectors since early october. This appeared to be
resolved by reseting the ADP on the 26th. Then the SAS was switched to a
higher data rate at (64 Hz and 8 pixels/limb) as we stopped offpointing,
06:10 UT 28/10. On Saturday night, SAS images started to be taken at the
full rate, instead of 1 every 1000. This rather quickly filled the memory.  
This was again resolved by resetting the ADP. The memory is still high and 
the write pointer over took the read one. 

6. Other Operation Things

The voltage on G5 was lower by 4 steps, on Sunday morning.

7. Other Things

GOES data for the week of the 18th still hasn't appeared on ssw_db yet, so
don't have the GOES/RHESSI and GOES/RHESSI/WIND for the last 3 weeks
(since the 10th).

Next Tohban: Pascal Saint-Hilaire