RHESSI Tohban report, 20-Sep-2007 to 26-Sep-2007
Albert Y. Shih, ayshih@ssl.berkeley.edu

1. Solar Activity

The Sun was extremely quiet.


2. Memory Management

The detector is in normal/active decimation mode, and events are being
recorded during the eclipse, but still the SSR empties every day.


3. Data Gaps

GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS          11
GAP START TIME              GAP END TIME                   GAP (SEC)
2007-09-22T10:05:00.000 -- 2007-09-22T11:45:00.000       6000.0000
2007-09-22T16:00:00.000 -- 2007-09-22T16:35:00.000       2100.0000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           4
GAP START TIME              GAP END TIME                   GAP (SEC)
2007-09-22T10:05:00.000 -- 2007-09-22T11:45:00.000       6000.0000
2007-09-24T00:35:00.000 -- 2007-09-24T01:35:00.000       3600.0000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2007-09-20T10:00:00.000 -- 2007-09-20T13:35:00.000       12900.000
2007-09-21T21:10:00.000 -- 2007-09-21T21:30:00.000       1200.0000
2007-09-22T10:40:00.000 -- 2007-09-22T10:45:00.000       300.00000
2007-09-22T10:50:00.000 -- 2007-09-22T11:00:00.000       600.00000
2007-09-23T06:45:00.000 -- 2007-09-23T13:40:00.000       24900.000

Some VC1 gaps are from corrupted data from a bad downlink at Wallops.
The VC1-PMTRAS gap on September 24 is from the buffer being overwritten after
several BGS passes were bumped for THEMIS.
The VC3 gap on September 20 was due to a server crash at BGS.  The appropriate
data is still recoverable, but the file needs to be specially processed.  The
VC3 gap on September 23 is from files not yet received from Santiago.


4. Spacecraft Operations

On both September 24 and 25, the spacecraft software detected some errors in
the onboard memory (not the SSR) that have not yet been explained.  There do
not appear to be any ill effects in spacecraft operations.
     The high voltage on detector 2 was lowered 3 steps to 343 V, and it
remains segmented.


5. Next Tohban: Jim McTiernan