RHESSI Tohban report, 18-June-2008 to 25-June-2008
Martin Fivian (mfivian@ssl.berkeley.edu)

1. Solar Activity

The Sun was relatively quiet this week. Although a small active region turned
around the disk, the goes level was barely elevated above the baseline.


2. Memory Management

Over the weekend, a few passes have been lost and the data had to be replayed.
This caused the SSR level to creep up a bit with a maximum at about 37%
and minimums at about 12%. All the data could be recovered and the SSR is
on the way to be emptied.


4. Offpointing operations

On Monday, 2008-06-23, BGS 34985, the S/C ACS has been put in precession mode
starting the re-acquisition of Sun-pointing. As of 2008-06-25, RHESSI is
pointing at the Sun in normal science mode.
- decimation: Normal/Active
- attenuator logic enabled
- HLAT commands on
- Front segment data at night
- SAS nominal


5. Spin rate

On first BGS at 2008-06-25, spin-up started with nominal target of 15rpm.


6. SAS diagnostics

While still off-pointing, during the two orbits before starting the precession mode
(orbits 34983 and 34984), the SAS has been commanded to acquire data to measure
the offset and signal level for one orbit each. This data will show the long
term trends since launch.


7. Data Gaps

The following data gaps in the monitor rate and SOH data are reported:

GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
GAP START TIME              GAP END TIME                   GAP (SEC)
2008-06-24T17:45:00.000 -- 2008-06-25T00:00:00.000       22500.000
2008-06-21T22:10:00.000 -- 2008-06-21T23:15:00.000       3900.0000
2008-06-18T08:55:00.000 -- 2008-06-18T09:00:00.000       300.00000

GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
GAP START TIME              GAP END TIME                   GAP (SEC)
2008-06-19T13:15:00.000 -- 2008-06-19T13:25:00.000       600.00000