RHESSI Tohban report, 17-May-2006 to 24-May-2006
Pascal Saint-Hilaire, shilaire@ssl.berkeley.edu

1. Solar Activity

Solar activity was very low, for a change.
We've had 9 B-flares, 4 of which occured within a few hours.
RHESSI was being eclipsed during the impulsive phase of the strongest one, but we caught all the decay phase, hurray!

We currently have 3 AR that have been pretty mild until now.
GOES background level started around the A2 level, and is now around A5.

MDI farside images do not show any AR to rotate to the earthside soon. 

How many GOES flares occurred?
  Flares above B, C, M, X class were      3     0     0     0
And how many of these are listed in the RHESSI flare list?
  Flares above B, C, M, X class were      2     0     0     0
And how many had EXCELLENT coverage?
  Flares above B, C, M, X class were      1     0     0     0
 
There were RHESSI flares/GOES flares          10 /            3
over the time range 16-May-06 23-May-06


2. Memory management

During the last few days, the SSR fill level ranged between ~17% and 0%.

3. Decimation & attenuator

Decimation is NORMAL/VIGOROUS, front segment data are not taken during S/C night.
Front decimation only came on a couple of times, during data replaying (see MISC., further on).
Attenuator state remained unchanged (both out) throughout the week.

4. Data gaps

The datagaps webpage and Observing Summary fits files seem to indicate three large datagaps:
between ~01:45 and 04:00 and between 06:30 and 10:00 on 2006/05/18, as well as between ~13:00 and 16:00 on 2006/05/19. 
(Two A5 flares have been lost...)


DATA GAPS FOR 2006/05/18
TIME RANGE: 2006-05-18T00:00:00.000 -- 2006-05-19T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2006-05-18T10:30:00.000 -- 2006-05-18T15:40:00.000       18600.000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2006-05-18T10:30:00.000 -- 2006-05-18T15:35:00.000       18300.000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2006-05-18T01:40:00.000 -- 2006-05-18T04:10:00.000       9000.0000
2006-05-18T06:25:00.000 -- 2006-05-18T09:45:00.000       12000.000

DATA GAPS FOR 2006/05/19
TIME RANGE: 2006-05-19T00:00:00.000 -- 2006-05-20T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2006-05-19T18:00:00.000 -- 2006-05-19T18:40:00.000       2400.0000
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2006-05-19T12:55:00.000 -- 2006-05-19T16:25:00.000       12600.000


5. MISC.

Data was being replayed during this week, leading to sometimes unexpected readouts in the RHESSI status page (SSR fill level at 67%, no monitor rates,...).


6. Next Tohban: Iain Hannah