Tohban Report 2009-03-11

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Revision as of 18:53, 11 March 2009 (view source) Pshilaire (Talk | contribs) (New page: {{Infobox Tohban Report| |start_date = 25 Feb 2009 |end_date = 04 Mar 2009 |tohban_name = Lindsay Glesener |tohban_email = glesener@ssl.berkeley.edu |next_tohban = Pascal Saint-Hilaire }} ...) ← Older edit		Latest revision as of 03:32, 1 March 2013 (view source) Lglesener (Talk | contribs)
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	{{Infobox Tohban Report|		{{Infobox Tohban Report|
-	|start_date = 25 Feb 2009	+	|start_date = 04 Mar 2009
-	|end_date = 04 Mar 2009	+	|end_date = 11 Mar 2009
-	|tohban_name = Lindsay Glesener	+	|tohban_name = Pascal Saint-Hilaire
-	|tohban_email = glesener@ssl.berkeley.edu	+	|tohban_email = shilaire@ssl.berkeley.edu
-	|next_tohban = Pascal Saint-Hilaire	+	|next_tohban = Steve Christe
	}}		}}
	== Solar Activity ==		== Solar Activity ==
-	Very quiet; no GOES flares and no new active regions.	+	Very calm: the GOES LO channel was flat-lined the whole week.
		+	A weak active region (AR 11014) appeared in the middle of the week, but did not amount to anything interesting X-ray-wise.
	== Memory Management ==		== Memory Management ==
-	Max SSR fill is 25-30%. The decimation is normal/active and front-segment events are being recorded during eclipse.	+	Max SSR fill is about 25%, goes down to 0% at the end of each daily pass set.
		+	The decimation is normal/active and front-segment events are being recorded during eclipse.
	== Data Gaps ==		== Data Gaps ==
-	On March 3, there is about half a day of sporadically missing data packets, likely from a bad pass. Since there was no solar activity during this time, it's probably not worth replaying the data.	+	On March 4, there are a few 5 or 10-mins gaps. Another one on the 5th, and two more on the 7th.
		+	Given the Sun's inactivity, it is probably not worht replaying them.
	== Spacecraft Operations ==		== Spacecraft Operations ==
-	On Feb. 26, the temperature threshold for the HV cutoff was changed from 100K to 115K, with yellow and red limits put in at 105K and 110K, respectively.  This was done to ensure that we do not trip the cutoff since the temperature is now just below 100K.  (CP2 is currently at 97.6K.)  However, it does appear the the temperatures have recently been trending downward.	+	Cold Plate 2, now at 97.9K, is 0.3 K warmer than last week.
-	A HV change was requested: another 6 steps down on detectors 6 and 8.
-	[[Category:Tohban Report]]	+	Email from Jeremy on 2009/03/05:
-	[[Category:Tohban]]	+
		+	Today, between 064-21:43 UT and 065-01:20 UT we spun up to 15.00 RPM.
		+	We also lowered the voltages on detectors 6 and 8 by 6 steps as discussed
		+	in the meeting yesterday.  The exact time of the HV commanding was:
		+
		+	09-064-23:20:12 /ihvdac detector=6, voltage=109
		+	09-064-23:20:38 /ihvdac detector=8, voltage=113
		+
		+	Detectors 6 and 8 remained segmented.
		+
		+
		+	It was decided to offpoint and go into tail-dragging mode, for quiet Sun measurements.
		+
		+
		+	[[Category:Tohban Report 2009]]

---

Latest revision as of 03:32, 1 March 2013

Tohban Reports
Start Date:	04 Mar 2009
End Date:	11 Mar 2009
Tohban:	Pascal Saint-Hilaire
Tohban email:	shilaire@ssl.berkeley.edu
Next Tohban:	Steve Christe
List all reports

Contents 1 Solar Activity 2 Memory Management 3 Data Gaps 4 Spacecraft Operations

Solar Activity

Very calm: the GOES LO channel was flat-lined the whole week. A weak active region (AR 11014) appeared in the middle of the week, but did not amount to anything interesting X-ray-wise.

Memory Management

Max SSR fill is about 25%, goes down to 0% at the end of each daily pass set. The decimation is normal/active and front-segment events are being recorded during eclipse.

Data Gaps

On March 4, there are a few 5 or 10-mins gaps. Another one on the 5th, and two more on the 7th. Given the Sun's inactivity, it is probably not worht replaying them.

Spacecraft Operations

Cold Plate 2, now at 97.9K, is 0.3 K warmer than last week.

Email from Jeremy on 2009/03/05:

Today, between 064-21:43 UT and 065-01:20 UT we spun up to 15.00 RPM. We also lowered the voltages on detectors 6 and 8 by 6 steps as discussed in the meeting yesterday. The exact time of the HV commanding was:

09-064-23:20:12 /ihvdac detector=6, voltage=109 09-064-23:20:38 /ihvdac detector=8, voltage=113

Detectors 6 and 8 remained segmented.

It was decided to offpoint and go into tail-dragging mode, for quiet Sun measurements.