Tohban Report 2015-07-01

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Revision as of 12:52, 1 July 2015 (view source) JuanCamiloBuitragoCasas (Talk | contribs) (→Attenuator management) ← Older edit		Revision as of 12:58, 1 July 2015 (view source) JuanCamiloBuitragoCasas (Talk | contribs) (→Detector issues) Newer edit →
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	== Detector issues ==		== Detector issues ==
-	No threshold changes this week.	+	En general detectors were stable this week, no changes were needed. Light leak is still observed on the Front segment of detector 2. D8 and D9 front livetime are still showing low values.
-		+
-	D8 and D9 front livetime are low, but they have been for awhile and there have been no negative trends recently. There are no memory problems.	+
-		+
-	It was noticed that the D9 front slow threshold is high.  Does it need to be this high?	+
	== Attenuator management ==		== Attenuator management ==

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Revision as of 12:58, 1 July 2015

Tohban Reports
Start Date:	24 Jun 2015
End Date:	01 Jul 2015
Tohban:	Milo Buitrago-Casas
Tohban email:	milo@ssl.berkeley.edu
Next Tohban:	??
List all reports

Contents 1 Solar Activity 2 Memory Management 3 Spacecraft Status 4 Data Gaps 5 Detector issues 6 Attenuator management 7 Spacecraft Management

Solar Activity

Solar activity was rather low this week. Currently there are three active regions that just showed up on the east limb. Activity is not expected to be so high next couple of days. The major flare this week was a M7.2 that RHESSI observed during its decay phase.

How many GOES flares occurred?

 Flares above B, C, M, X class were     19    19     1     0

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

 Flares above B, C, M, X class were     10    12     1     0

And how many had EXCELLENT coverage?

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

There were RHESSI flares/GOES flares 301 / 39 over the time range 23-Jun-15 30-Jun-15

Memory Management

SSR fill was pretty low this week, usually below 40%. On June 29 the were some spikes in the SSR filling that I would like to discuss.

Spacecraft Status

Normal as far as the Tohban can tell.

Data Gaps

In the first half of the week there continued to be many short data gaps in the SOH and PMTRAS data, as well as an occasional one in the monitor rates, including the strangest set of gaps ever seen to this tohban: [1] That gap set occurred at the tail end of the problem in getting data through due to stale TLEs / high solar activity (=more spacecraft drag). Ops has continued to work on resolutions to these problems, which only occur during perfect storms of high solar activity and particularly bad TLEs.

Detector issues

En general detectors were stable this week, no changes were needed. Light leak is still observed on the Front segment of detector 2. D8 and D9 front livetime are still showing low values.

Attenuator management

Last Wednesday June 24 we increased the threshold used to put the thin attenuator IN (A0 to A1). We went from a value of 5.1 % to 10 % That change took effect 2015-175-22:12:56 UTC. We agreed in to perform this experiment for about one month, it means that by July 22 we should asses how well this changed worked.

Spacecraft Management

Spin-up

We're still in Active/Vigorous decimation, and still taking events at night.

Decimation	Active/Vigorous
Night time data (fronts)	Taking night events
Night time data (rears)	Taking night events
Require extra passes?	No
Requirement for moving pointer?	Some replaying
Attenuator operation	Still trying to optimize motions.