Tohban Report 2017-05-17
| Tohban Reports | |
|---|---|
| Start Date: | 10 May 2017 |
| End Date: | 17 May 2017 |
| Tohban: | Milo Buitrago-Casas |
| Tohban email: | milo@ssl.berkeley.edu |
| Next Tohban: | Juan Carlos Martinez-Oliveros |
| List all reports | |
Solar Activity
The Sun was really quiet this week. There were NO GOES flares during the last week. Current solar activity is under level GOES-A8. There are only two pretty small active regions on the East limb with little changes to host a solar flare in the next couple of days.
Memory Management
Decimation was active/vigorous for the full time period. SSR at 28% with 1 pass to go today.
Spacecraft Status
Detectors 1, 3, 6, and 8 are recording events.
Cold Plates temperatures are at 156.5 and 155.1 K. Cold Tips at 130.1 and 128.1 K respectively.
See http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf for a summary plot of recent temperatures, efficiencies and accelerometer values.
Data Gaps
GAP START TIME GAP END TIME GAP (SEC) 2017-05-11T05:15:00.000 -- 2017-05-11T06:15:00.000 3600.0000 2017-05-11T07:10:00.000 -- 2017-05-11T07:35:00.000 1500.0000 2017-05-11T07:45:00.000 -- 2017-05-11T08:35:00.000 3000.0000 2017-05-15T17:55:00.000 -- 2017-05-16T00:00:00.000 21900.000 2017-05-15T17:55:00.000 -- 2017-05-16T00:00:00.000 21900.000 2017-05-15T16:30:00.000 -- 2017-05-15T19:30:00.000 10800.000 2017-05-15T19:50:00.000 -- 2017-05-16T00:00:00.000 15000.000 2017-05-16T00:00:00.000 -- 2017-05-16T11:05:00.000 39900.000 2017-05-16T17:25:00.000 -- 2017-05-17T00:00:00.000 23700.000 2017-05-16T00:00:00.000 -- 2017-05-16T11:05:00.000 39900.000 2017-05-16T17:25:00.000 -- 2017-05-17T00:00:00.000 23700.000 2017-05-16T00:00:00.000 -- 2017-05-17T00:00:00.000 86400.000
Detector issues
Detectors 1, 3, 6, and 8 are powered on, and are recording events. Some oscillations observed on detector 1,3, and 8 during the weekend have stopped. Data look clean for the last couple of days.
On Monday, May 15, the HV on G6 was decreased from ~3400 to ~2000V to improve its livetime. The experiment seemed to work.
2017-135-17:50:10 /ihvdac detector=6, voltage=103 ; 2000 V
Notes
Next Tohban should keep an eye on the oscillatory behavior on G6 livetime.
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 | See Notes above |
| Detector problems? | See above |