Tohban Report 2014-10-15

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Tohban Reports
Start Date: 08 Oct 2014
End Date: 15 Oct 2014
Tohban: Juan Carlos Martínez Oliveros
Tohban email:
Next Tohban: Juan Camilo Buitrago-Casas
List all reports


Solar Activity

Solar activity was low this week with some sporadic M class flares. Currently there are 4 active regions on disk and the active region responsible for the latest M class flares will be rotating onto the disk this week.

How many GOES flares occurred?

 Flares above B, C, M, X class were      7    18     5     0

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

 Flares above B, C, M, X class were      6     9     5     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      5     2     2     0

There were RHESSI flares/GOES flares 127 / 30 over the time range 08-Oct-14 15-Oct-14

Memory Management

The SSR was emptying by the end of the daily pass set during most of the week. A joint observation with SDO made the SSR to reach a maximum of ~44% and as the last BGS contact the SSR fill levels was at about ~9% most likely due to the latest flares.


Cold tip temperatures where a little high this week triggering two warnings. As the last pass the colt tip temperatures are 127.1 K and 125.4 K.

Spacecraft Operations

The spacecraft is operating nominally. The attenuators are working correctly. A special operation during SDO rolling maneuver was schedule from 2014/281 17:51 to 282 00:41 during which we intend to collect as much RHESSI/SAS data as possible. Everything worked as planned and additional passes allowed to minimize the impact on the SSR fill level.

The decimation was changed on October 13 at19:59 UT to NORMAL/VIGOROUS and event collection during nights from both the front and rear segments was enable.

Data Gaps

No gaps this week.

Detector issues

Detector 2 continue showing light leak issues as well as detector 5.

Detector 9, still show some spikes but the number of spikes became less frequent.

One spike was observed on October 8 in detector 5.

There were no threshold changes this week.

Other notes

Decimation Normal/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) full nighttime events
Night time data (rears) full nighttime events
Require extra passes? Yes
Requirement for moving pointer? No
Attenuator operation Nominal
Detector problems? Detector 5, 9 spikes
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