Tohban Report 2017-04-19

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(Spacecraft Status)
(Data Gaps)
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Relatively large (>300 sec) data gaps as follows:
Relatively large (>300 sec) data gaps as follows:
-
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
+
GAP START TIME              GAP END TIME                  GAP (SEC)
-
GAP START TIME              GAP END TIME                  GAP (SEC)
+
2017-04-15T17:25:00.000 -- 2017-04-15T22:40:00.000      18900.000
-
2017-03-30T19:40:00.000 -- 2017-03-30T20:05:00.000      1500.0000
+
2017-04-15T17:25:00.000 -- 2017-04-15T22:35:00.000      18600.000
-
2017-04-02T06:00:00.000 -- 2017-04-02T06:25:00.000      1500.0000
+
2017-04-13T13:50:00.000 -- 2017-04-13T14:00:00.000      600.00000
-
2017-04-02T11:55:00.000 -- 2017-04-02T12:10:00.000      900.00000
+
-
2017-04-03T21:05:00.000 -- 2017-04-03T21:20:00.000      900.00000
+
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2017-04-03T21:25:00.000 -- 2017-04-04T00:00:00.000      9300.0000
+
== Detector issues ==
== Detector issues ==

Revision as of 16:17, 19 April 2017


Tohban Reports
Start Date: 29 March 2017
End Date: 5 April 2017
Tohban: Milo Buitrago-Casas
Tohban email: milo@ssl.berkeley.edu
Next Tohban: TBD
List all reports



Contents

Solar Activity

The Sun was active this week, producing a handful of B-class flares and two C-flares, one yesterday and one this morning. Currently, there is one AR peeping out on the Est limb and is expected to remain on disk this coming week with a slight chance to host M-class flares.

How many GOES flares occurred?

 Flares above B, C, M, X class were     18     1     0     0

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

 Flares above B, C, M, X class were      8     1     0     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 22 / 19 over the time range 11-Apr-17 18-Apr-17

Memory Management

Early this week, the SSR was quite high ~40% at due to the four detectors that were on last week. After turning off detectors 1 and 8 on April 12, the SSR was gradually emptying reaching a minimum of 9% at the end of the day on Monda April 17. In response to the rotation on the disk of a big Active Region, detectors 1 and 8 were turned on again so the SSR is expected to gradually increase this week. Currently, it is at 18.4%.

Spacecraft Status

Detectors 3 and 6 are recording events. Due to a big active region on the solar disk, detectors 1 and 8 were turned on.

The cold tips are 127.3 and 125.1 K as of 19-Apr-2017. The cold plates, 1 and 2 are 152.5 and 151.0 K. Cryocooler power is steady at 74.9W. See:

http://sprg.ssl.berkeley.edu/~ayshih/soh/latest_temperatures.pdf

for a summary plot of recent temperatures, efficiencies and accelerometer values.

Data Gaps

Relatively large (>300 sec) data gaps as follows:

GAP START TIME GAP END TIME GAP (SEC) 2017-04-15T17:25:00.000 -- 2017-04-15T22:40:00.000 18900.000 2017-04-15T17:25:00.000 -- 2017-04-15T22:35:00.000 18600.000 2017-04-13T13:50:00.000 -- 2017-04-13T14:00:00.000 600.00000

Detector issues

Detectors 1, 3, 6 and 8 are on and working. While the AR2644 that produced M-class flares is now at the limb, there is still another big AR on disk. So it was determined to keep the detectors 1 and 8 on unless there is an issue with the temperatures.

Notes

For the flare of April 3 14UT, pileup was relatively high (40% at 30 keV) with the attenuator state A1. It was decided to revisit the current thresholds of the thin/thick attenuator logic.

Spacecraft Management

Decimation Active/Vigorous
HLAT Decimation Rear decimation
Night time data (fronts) plus/minus 4 minutes from daylight
Night time data (rears) plus/minus 4 minutes from daylight
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation None
Detector problems? None
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