Tohban Report 2014-10-29

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Tohban Reports
Start Date: 22 Oct 2014
End Date: 29 Oct 2014
Tohban: Hazel Bain
Tohban email:
Next Tohban: Nicole Duncan
List all reports


Solar Activity

Solar activity this week was high with 5 X class flares and 17 M class flares produced by AR 12192 as it moved across the disk. AR 12192 has been the biggest active region observed on the Sun in the last 24 years. It is now on the west limb of the Sun and will soon rotate over the limb. While solar activity has declined slightly in the last 24 hours, the active region is still classified as beta/gamma/delta region and my continue to produce significant flaring activity. There are 5 other ARs on disk, none of which are producing flares.

How many GOES flares occurred?

 Flares above B, C, M, X class were      0    41    17     5

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

 Flares above B, C, M, X class were      0    27    13     5

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      0    16    10     0

There were RHESSI flares/GOES flares 391 / 63 over the time range 22-Oct-14 29-Oct-14

Memory Management

SSR max fill level was high this week due to the increased solar activity and a loss of some Wallops passes due to the Orbital rocket launch. Extra Weilheim and Santiago passes were added to accommodate the increased data rate. Night time time data collection remained off throughout the week and the decimation state remained in "Active/Vigorous".


At times the CPC temperature hit the yellow limit.

Spacecraft Operations

Attenuator motion was nominal. We stopped taking the whole night time data today (October 22) at 17:40 UT.

Data Gaps

No data gaps this week.

Detector issues

Detector 2: It still presents the light leak issue with a not significant change from last week.

There were no threshold changes this week.

Other notes

Decimation Active/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) Full nighttime events stopped
Night time data (rears) Full nighttime events stopped
Require extra passes? We are going to ask for extra passes this week because the big active region
Requirement for moving pointer? No
Attenuator operation Nominal with a lot of motions because the high solar activity
Detector problems? Detector 2 light leak
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