Tohban Report 2013-05-15

From RHESSI Wiki

Jump to: navigation, search

Tohban Reports
Start Date: 08 May 2013
End Date: 15 May 2013
Tohban: Hazel Bain
Tohban email:
Next Tohban: Lindsay Glesener
List all reports


Solar Activity

Solar activity this week was very high with 4 X class flares and 5 M class flares. The X class flares were produced by AR 11748 as it was rotating onto the limb.

How many GOES flares occurred?

 Flares above B, C, M, X class were      2    50     5     4

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

 Flares above B, C, M, X class were      2    33     4     3

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      1    15     1     2

There were RHESSI flares/GOES flares 347 / 61 over the time range 08-May-13 15-May-13

Memory Management

SSR reached a max of ~60% this week due to the increase in solar activity. 7 extra Weilheim passes were added to handle the increased data rate. The decimation state was changed to active/vigorous and rear events turned off during night (except 4 mins at the start and end of eclipse) on 13-may-2013. by the end of the pass set last night the SSR was ~28%.

Spacecraft Status

There was a spin up on 8-may-2013.

Cold plate plate 1 is now 115.5 K.

Further attempts to rebalance the cryocooler we made on passes between 8-may-2013 and 10-may-2013. An exploration of the balancer amplitude and phase space was carried out, changing both parameters simultaneously by one step at a time. A region of low vibrations was found where the accelerometer was reading ~14 mg. Further fine tuning was postponed due to the increase in solar activity but will resume during a quieter time.

Data Gaps

There were no data gaps this week.

Detector issues

Detector 9 showed only one "dropouts"/noise:

Other notes

The rebalancing of the cryocooler will this week is the solar activity diminishes.

Spacecraft Management

Decimation Active/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) +/- 4 minutes
Night time data (rears) +/- 4 minutes
Require extra passes? Yes (WHM)
Requirement for moving pointer? No
Attenuator operation Normal
Detector problems? D9 noise, only one occurance
Personal tools