Tohban Report 2017-10-25

Tohban Reports
Start Date:	18 October 2017
End Date:	25 October 2017
Tohban:	Jim McTiernan
Tohban email:	jimm@ssl.berkeley.edu
Next Tohban:	TBD
List all reports

Solar Activity

Minimal activity last week, dead quiet now.

How many GOES flares occurred?

 Flares above B, C, M, X class were      5     0     1     0

And how many of these are listed in the RHESSI flare list?

 Flares above B, C, M, X class were      2     0     1     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 5 / 6 over the time range 17-Oct-17 24-Oct-17

Memory Management

Decimation was active/vigorous for the full time period, with the SSR level rising to 54%, due to minimal BGS contact.

Spacecraft Status

Detectors 1, 3, 6, and 8 are recording events. The cold tips are 132.8 and 131.0 K as of 2-oct-2017. The cold plates, 1 and 2 are 158.5 and 157.1 K. Cryocooler power is steady at 74.0W, cryocooler efficiencies are 0.0269 and 0.0273. See:

http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf

for a summary plot of recent temperatures, efficiencies and accelerometer values.

Data Gaps

DATA GAPS FOR 19-oct-2017 TO 26-oct-2017

TIME RANGE: 2017-10-19T00:00:00.000 -- 2017-10-26T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-20T11:45:00.000 -- 2017-10-20T13:25:00.000       6000.0000
2017-10-25T16:05:00.000 -- 2017-10-26T00:00:00.000       28500.000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           4
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-19T11:35:00.000 -- 2017-10-19T12:10:00.000       2100.0000
2017-10-19T12:15:00.000 -- 2017-10-19T15:15:00.000       10800.000
2017-10-20T11:45:00.000 -- 2017-10-20T13:25:00.000       6000.0000
2017-10-25T16:05:00.000 -- 2017-10-26T00:00:00.000       28500.000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-10-19T17:20:00.000 -- 2017-10-19T17:25:00.000       300.00000
2017-10-23T01:15:00.000 -- 2017-10-26T00:00:00.000       254700.00

Detector issues

Detectors 1, 3, 6, and 8 are powered on, and are recording events. No HV or threshold changes. Detector 6 front live time has large fluctuations due to increased fast rates when the average cold plate temperature is in the 158 K range.

== Spacecraft Management ==

Decimation	Active/Vigorous
HLAT Decimation	Rear decimation
Night time data (fronts)	plus/minus 4 minutes from daylight
Night time data (rears)	plus/minus 4 minutes from daylight
Require extra passes?	No
Requirement for moving pointer?	No
Attenuator operation	Nominal
Ref. deadtime for Att.thresholds	23.x%
Detector problems?	See above