Tohban Report 2012-07-25
From RHESSI Wiki
|Start Date:||18 July 2012|
|End Date:||25 July 2012|
|Next Tohban:||Lindsay Glesener|
|List all reports|
Solar activity has decreased this week due to AR 11520 rotating off the disk. However before it rotated out of view it produced one particularly nice M-class flare on the 19th of July. The solar background has now returned to low B-class level. There are currently 7 active regions on disk with STEREO B showing a couple of small active regions due to rotate onto the disk in the next few days.
How many GOES flares occurred?
Flares above B, C, M, X class were 9 13 1 0
And how many of these are listed in the RHESSI flare list?
Flares above B, C, M, X class were 5 11 1 0
And how many had EXCELLENT coverage?
Flares above B, C, M, X class were 2 2 0 0
There were RHESSI flares/GOES flares 97 / 23 over the time range 18-Jul-12 25-Jul-12
SSR is currently ~16%. Increased low energy counts from detector 8 on exiting the SAA are thought to have contributed to a higher than normal SSR fill level for the current solar activity. The HV on detector 8 was was lowered by 5 steps (193 to 188) at 206/20:25 UT to try and resolve this problem. An extra one day of AGO passes have been scheduled for July 26th to help empty the SSR.
The cryocooler power was decreased from 78 W to 71 W at 2012-200-21:03:56 UTC. The accelerations dropped from ~17 mG down to ~12 mG and the cold tip temperatures rose by a few tenths, during the remainder of the pass. The cold plate 1 and 2 temperatures are currently at 107.3 K and 105.1 K respectively.
A spin up was completed at 203/15:40 UT.
There were no significant data gaps this week (only two ~5 min gaps on the 20th and 21st).
Due to an excess of low energy counts coming out of the SAA, the HV on detector 8 was lowered by 5 steps, from 193 to 188 at 206/20:25 UT. The data following this change has not yet been downlinked to check whether this has resolved the problem.
|Decimation||Active/vigorous (as of day 184)|
|Night time data (fronts)||+/- 4 minutes|
|Night time data (rears)||+/- 4 minutes|
|Require extra passes?||Yes|
|Requirement for moving pointer?||No|
|Detector problems?||Detector 8 HV lowered by 5 steps (see above for details).|