Tohban Report 2013-05-01
| Tohban Reports | |
|---|---|
| Start Date: | 24 Apr 2013 |
| End Date: | 01 May 2013 |
| Tohban: | Mitsuo Oka |
| Tohban email: | moka@ssl.berkeley.edu |
| Next Tohban: | TBD |
| List all reports | |
Solar Activity
Solar activity this week was moderate. Many C class flares were produced by NOAA 11726 in the earlier half of the week and by NOAA 11730/11731 in the later half of the week. There are currently 6 active regions on the disk.
How many GOES flares occurred?
Flares above B, C, M, X class were 3 72 0 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 3 55 0 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 1 30 0 0
There were RHESSI flares/GOES flares 507 / 75 over the time range 23-Apr-13 30-Apr-13
Memory Management
The SSR was mostly emptying at the end of the daily passes during the beginning of the week.
Spacecraft Status
The cold plate 1 and 2 are at 114 K and 112 K respectively. Spint rate is a 14.6 rpm
Data Gaps
There was no data gaps this week.
Detector issues
Other notes
On April 25, a rebalancing of the cryocooler was performed as a measure to lower the power consumption and the overall increase trend in temperature. However, increasing/decreasing of both amplitude and phase of the balancer only led to vibration increase. The amplitude and phase were put back to original values.
Brian reported further changes in state-of-health plots. Since last week, the Sun fraction has increased to peak at 0.71 and the Cold Plate 2 temperature has decreased to 111 K. This is to be compared with 106.5 K at the time of the previous similar peak in the Sun fraction that occurred about Feb. 10. So there has been a 4.5 K increase in about 2.5 months or about 20 K per year. The accelerometer reading has stayed constant just below 16 mg for the last week or so.
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 |