Tohban Report 2010-05-19
From RHESSI Wiki
| Tohban Reports | |
|---|---|
| Start Date: | 12 May 2010 |
| End Date: | 19 May 2010 |
| Tohban: | Hugh Hudson |
| Tohban email: | hhudson@ssl.berkeley.edu |
| Next Tohban: | Pascal Saint-Hilaire |
| List all reports | |
Contents |
Operations from a tohban's perspective
Everything was quite normal. Adjustment to the high voltage on G5 at the beginning of the week (11 May) eliminated its problems satisfactorily. The light-leak signatures in some of the rear segments are certainly there, but they are not contributing to the dead time more than a few percent.
Solar activity
Dreadful. A B3 event on May 12 was the last whimper of activity, and STEREO data show us that it's not just the front side that is dead. F10.7 is below 70 again, a level typical of absolute solar minimum.
Data gaps
Two orbits of data are missing (from 15-May 22:40).
Oddities
1) Odd minor noise at 14-May 15:00, visible in rear fast rates. This was identified by Albert as a decimation effect, coupled with sensitivity in the corrected summary plots. 2) The 6-12 keV count rates on the summary plots seem to have a floor now at about 8 cps, and relatively speaking don't show so much latitude effect. Presumably this is the result of the anneal and the improvement of the dead volumes. Is this consistent with our understanding? Compare http://sprg.ssl.berkeley.edu/~tohban/browser/?show=qlpcr+monfs&date=20100211&time=165156 with http://sprg.ssl.berkeley.edu/~tohban/browser/?show=qlpcr+monfs&date=20100517&time=223939, for example. Earlier data had a minimum 6-12 rate of about 6 cps.
