Tohban Report 2013-06-19

From RHESSI Wiki

Jump to: navigation, search

Tohban Reports
Start Date: 12 June 2013
End Date: 19 June 2013
Tohban: Lindsay Glesener
Tohban email:
Next Tohban: Partymaster Juan Carlos Martinez Oliveros
List all reports


Solar Activity

This was a very quiet week. There are 9 active regions on the disk, but not much activity. It's expected that the Sun will stay quiet.

How many GOES flares occurred?

 Flares above B, C, M, X class were     25     12     0     0

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

 Flares above B, C, M, X class were      19     9     0     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      12     3     0     0

over the time range 12-Jun-13 19-Jun-13

Memory Management

No memory issues.

Spacecraft Status

There was discussion of the cryostat temperatures; see Brian's presentation. Upshot is that although earlier this year it seemed that the cold plate temperature was increasing at a very fast rate (30 K/yr), looking at the long-term trend over the past seven months shows that the rate is 10K/yr average. Good news, as it means we've got several years to go before hitting 150K. Brian will continue to monitor this, as should everyone.

It was noted that the CPC temperature is high (51.2 deg C). This is likely due to the day length and Jeremy expects that it will start trending down tomorrow. However, since this is a high value for this parameter it should be monitored.

Data Gaps


Detector issues

I didn't see any problems with the detectors. Det9 rate fluctuations have stopped again.

Other notes

There was more discussion of the "anomalous" spin-ups that occasionally occur when the ACS system does not properly measure the spin rate (because of magnetic field alignment). Today's discussion centered around the behavior of the PMTRAS during anomalous spin-ups. It was determined that there is no degradation in the system during the anomalies and so there should be no impact on RHESSI data analysis. There are a few odds and ends to clean up (i.e. what is the interesting behavior that occurs in the eclipse after one anomaly? And has the spin-down rate actually increased throughout the mission?) but in general this issue is not considered a concern. See Martin's presentation on PMTRAS performance.

Spacecraft Management

Decimation Normal/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) +/- 4 minutes
Night time data (rears) Enabled
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation Normal
Detector problems? None
Personal tools