Tohban Report 2017-04-19

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(Data Gaps)
(Detector issues)
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== Detector issues ==
== Detector issues ==
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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.
+
Because the moderate solar activity early this week, and the presence of a new active region on the Est solar limb, it was decided to turn on detectors 1 and 8 the past Monday Abril 17 around 21:30UT. Temperatures on the cold plates and tips looked stable during the last couple of days after turning on those two detectors. Also the SSR filling level has been rather low (~15% at the end of the passes).
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 +
Commanding were the follow:
 +
 
 +
2017-107-21:31:18 start idib_on_g1
 +
2017-107-21:31:35 start idib_on_g8
 +
2017-107-21:32:05 start ihv_ramp_stage2_g1 ; 1000 V
 +
2017-107-21:32:20 start ihv_ramp_stage2_g8 ; 1000 V
 +
 
 +
17-107-23:09:42 start ihv_ramp_stage3_g1
 +
17-107-23:09:58 start ihv_ramp_stage3_g8
 +
 
 +
17-107-23:14:37 start sc_ssr_rtime halted
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17-108-00:40:32 start idib_chg_thrshld(8, FRONT, FAST, 0x90)
 +
17-108-00:40:36 /IDPUDUMPTABL TABLE=DIBTBL8
 +
17-108-00:40:36 /IDPUTABLE8 OFFSET=FRONTFASTDAC
 +
17-108-00:41:06 /IDPULOAD VALUE=0x90
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 +
17-108-00:43:46 start idib_chg_thrshld(1, FRONT, FAST, 0x80)
 +
17-108-00:43:49 /IDPUDUMPTABL TABLE=DIBTBL1
 +
17-108-00:43:49 /IDPUTABLE1 OFFSET=FRONTFASTDAC
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17-108-00:43:58 /IDPULOAD VALUE=0x80
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 +
17-108-00:45:22 start idib_chg_thrshld(1, REAR, FAST, 0x60)
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17-108-00:45:26 /IDPUDUMPTABL TABLE=DIBTBL1
 +
17-108-00:45:27 /IDPUTABLE1 OFFSET=REARFASTDAC
 +
17-108-00:45:34 /IDPULOAD VALUE=0x60
 +
 
 +
17-108-00:49:52 start sc_ssr_rtime halted
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 +
 
 +
Detectors 1, 3, 6 and 8 are on and working. There is a new active region on disk (AR2651) that produced a C-class flare this morning and will remain active for the next couple of days. So it was determined to keep the detectors 1 and 8 on unless there is an issue with the temperatures.
== Notes ==
== Notes ==

Revision as of 16:28, 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

Because the moderate solar activity early this week, and the presence of a new active region on the Est solar limb, it was decided to turn on detectors 1 and 8 the past Monday Abril 17 around 21:30UT. Temperatures on the cold plates and tips looked stable during the last couple of days after turning on those two detectors. Also the SSR filling level has been rather low (~15% at the end of the passes).

Commanding were the follow:

2017-107-21:31:18 start idib_on_g1
2017-107-21:31:35 start idib_on_g8
2017-107-21:32:05 start ihv_ramp_stage2_g1 ; 1000 V
2017-107-21:32:20 start ihv_ramp_stage2_g8 ; 1000 V
17-107-23:09:42 start ihv_ramp_stage3_g1
17-107-23:09:58 start ihv_ramp_stage3_g8
17-107-23:14:37 start sc_ssr_rtime halted
17-108-00:40:32 start idib_chg_thrshld(8, FRONT, FAST, 0x90)
17-108-00:40:36 /IDPUDUMPTABL TABLE=DIBTBL8
17-108-00:40:36 /IDPUTABLE8 OFFSET=FRONTFASTDAC
17-108-00:41:06 /IDPULOAD VALUE=0x90
17-108-00:43:46 start idib_chg_thrshld(1, FRONT, FAST, 0x80)
17-108-00:43:49 /IDPUDUMPTABL TABLE=DIBTBL1
17-108-00:43:49 /IDPUTABLE1 OFFSET=FRONTFASTDAC
17-108-00:43:58 /IDPULOAD VALUE=0x80
17-108-00:45:22 start idib_chg_thrshld(1, REAR, FAST, 0x60)
17-108-00:45:26 /IDPUDUMPTABL TABLE=DIBTBL1
17-108-00:45:27 /IDPUTABLE1 OFFSET=REARFASTDAC
17-108-00:45:34 /IDPULOAD VALUE=0x60
17-108-00:49:52 start sc_ssr_rtime halted


Detectors 1, 3, 6 and 8 are on and working. There is a new active region on disk (AR2651) that produced a C-class flare this morning and will remain active for the next couple of days. 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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