Tohban Report 2015-11-04

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Tohban Reports
Start Date: 28 Oct 2015
End Date: 4 Nov 2015
Tohban: Juan C. Martinez Oliveros
Tohban email:
Next Tohban: Jim McTiernan
List all reports


Solar Activity

Solar activity was moderate this week, showing an increase in the last day, with two low M-class flares from NOAA 12445 and NOAA 12443. AR 12445 will soon rotate out of the disk, while AR 12443 is crossing the central meridian. There are currently 8 ARs on the disk with the probability of some C and M class flares in the following days. It seems like RHESSI did observed two of the low M-class flares today.

How many GOES flares occurred?

 Flares above B, C, M, X class were      4    75     1     0

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

 Flares above B, C, M, X class were      3    52     1     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      2    34     1     0

There were RHESSI flares/GOES flares 260 / 80 over the time range 27-Oct-15 03-Nov-15

Memory Management

The SSR fill level reached a maximum of ~20% and a minimum of about ~9% during the week.

Spacecraft Status

The cold plate 1 and 2 are at about ~135.2 K and ~133.7 K respectively.

Data Gaps

No data gaps this week.

Detector issues

The plan for this week was to decrease detectors 3, 6 and 8 HV to decrease the slow front counts observed reported during last week and also to try to correct the behavior observed in D8 livetime.

On October 28 the HV of detectors 3 and 6 were decreased by ~200V, and detector 8 HV was decreased to ~2100V . Following are the commands and times:

2015-301-20:28:06 /ihvdac detector=3, voltage=196
2015-301-20:28:46 /ihvdac detector=6, voltage=73
2015-301-20:29:56 /ihvdac detector=8, voltage=112

No major change in the front and rear resets and slows was observed in detectors 3 and 6, however a decrease by a factor of 2 was observed in rear resets of detector 8. Since then the rear resets count have been increasing.

Other notes

Spacecraft Management

A spin up was made on was done between 16:52 and 18:30 UTC today, November 2.

Decimation Active/Vigorous
Night time data (fronts) +- 4 minutes
Night time data (rears) +- 4 minutes
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation See above
Thin Att. in 11%
Thin Att. out 7.45%
Thick Att. in 12.9%
Thick Att. out 7.84%
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