Tohban Report 2013-05-08
| Tohban Reports | |
|---|---|
| Start Date: | 01 May 2013 |
| End Date: | 08 May 2013 |
| Tohban: | Lindsay Glesener |
| Tohban email: | glesener@ssl.berkeley.edu |
| Next Tohban: | Hazel Bain |
| List all reports | |
Solar Activity
There was a decent amount of activity this week, at least compared to recent months. There are currently 8 active regions on the disk. The most active this week was AR 11739, which spit out an M5 flare just after rotating onto the disk (on the 3rd) and many more C-flares with an occasional M in the days following. It's now in the center of the disk but has decayed significantly, so is no longer so active. I would expect that solar activity will continue at its current level (occasional C flares, nothing big).
How many GOES flares occurred?
Flares above B, C, M, X class were 7 61 4 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 5 39 4 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 4 24 3 0
There were RHESSI flares/GOES flares 380 / 72
Memory Management
The SSR is emptying at the end of each pass set and reached a max of 27%.
Spacecraft Status
The spin rate is down to 14.6 rpm, so it's time for a spin up, which will probably happen today.
There was a spin rate snafu on May 3/4. Occasionally the magnetic field configuration is such that the ACS system does not sense any change in magnetic field as it spins, thinks something is wrong, and after a timeout period (5 min) goes into IDLE mode. This problem happens (usually a few occurrences close together) about once a year or so. The ACS system was commanded back to precession mode on the next available pass. No ill effects remain. Here are the sequence of events:
- 2013-123-16:11 - ACS system went into IDLE mode due to spin rate
miscalculation.
- 2013-124-02:08 - Ground command to precession mode
- 2013-124-03:42 - Autonomously transitioned back to Normal mode.
Data Gaps
There were no data gaps this week.
Detector issues
Other notes
Spacecraft Management
| Decimation | Normal/vigorous |
| HLAT Decimation | Rear decimation weight 6, no front decimation |
| Night time data (fronts) | +/- 4 minutes |
| Night time data (rears) | Taking data at nights |
| Require extra passes? | No |
| Requirement for moving pointer? | No |
| Attenuator operation | Normal |
| Detector problems? | No |