Tohban Report 2012-11-21

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Tohban Reports
Start Date: 14 Nov 2012
End Date: 21 Nov 2012
Tohban: Hazel Bain
Tohban email:
Next Tohban: Lindsay Glesener
List all reports


Solar Activity

Solar activity this week was moderate with 3 M class flares. There are currently 10 active regions on the Sun, 6 of these will rotate over the limb within the next 48 hours. However a major flare watch has been called this morning for NOAA 1618, which has produced a number of C and M class flares over the last 24 hours (the largest was an M3.5 at 11/21/15:30 UT) and is currently in the center of the disk. NOAA 1618 has developed rapidly increasing its sunspot count, sunspot area, and magnetic complexity. 1618 is currently a large E-type/beta-gamma sunspot group with a magnetic delta configuration located within its central portion. There is a slight chance of an X-class event as well if 1618 continues in strong growth phase. STEREO B shows one further active region which will rotate onto the disk in the next few days.

How many GOES flares occurred?

 Flares above B, C, M, X class were      8    33     3     0

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

 Flares above B, C, M, X class were      7    21     3     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      2     6     0     0

There were RHESSI flares/GOES flares 280 / 44 over the time range 14-Nov-12 21-Nov-12

Memory Management

The SSR is emptying by the end of the daily pass set (max was ~25% this week). The decimation state was changed from active/vigorous to normal/vigorous at 2012-320-18:27:43 UTC.

We will remain in normal/vigorous for the time being, with the tohban keeping an eye on the SSR level in light of the major flare watch.

Spacecraft Status

The cold plate 1 and 2 temperatures are 110.9 K and 108.6 K respectively.

Data Gaps

There were a number of 5 min data gaps throughout the week.

Detector issues

There were no changes to the detector settings this week. However detector 5 front slow monitor rates are slightly higher than in previous weeks.

Other notes

Spacecraft Management

Decimation Normal/vigorous
HLAT Decimation
Night time data (fronts) +/- 4 minutes
Night time data (rears) +/- 4 minutes
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation Normal
Detector problems? None
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