Tohban Report 2015-10-07

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|tohban_name = Juan Carlos Martinez Oliveros and Hazel Bain
|tohban_name = Juan Carlos Martinez Oliveros and Hazel Bain
|tohban_email = hbain@ssl.berkeley.edu
|tohban_email = hbain@ssl.berkeley.edu
-
|next_tohban  =  
+
|next_tohban  = Lindsay Glesener
}}
}}
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== Memory Management ==
== Memory Management ==
-
The SSR is a bit high due to high solar activity, with a max of 48% and at 28% after the last pass set today.
+
The SSR is a bit high due to high solar activity, with a max of 69% and is now at a minimum of 28% after the last pass yesterday due to events being turned off on D4.
 +
 
-
The SSR started the week almost emptying.  However, after the HV drop on D4, slow events from D4 and D6 were high enough to keep steadily increasing the SSR fill.  This was even BEFORE solar activity picked up.  Because of this, I proposed that it might be a good idea to disable events on D4, with the reasoning that those events aren't giving us good data and are just eating up the SSR.  Because things didn't quite get bad enough that we were really in trouble, I did not implement this suggestion.  Future tohbans should keep it in mind as a last resort.
 
== Temperatures ==
== Temperatures ==
-
The cold plate temps have come down a bit, consistent with solar fraction.  CP1 = 134.7K, CP2 = 133.1K.
+
The cold plate temps have come up a bit.  CP1 = 135.9K, CP2 = 134.2K.
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15-279-02:17:05 start sc_tbl_loadpkt("T15271SLTN61_No_G4_G9.00")
15-279-02:17:05 start sc_tbl_loadpkt("T15271SLTN61_No_G4_G9.00")
-
* 6th of October 2015: The thin attenuator was stuck IN again during the Berkeley passes. No changed were made to the threshold values but the thin attenuator was commanded out. It remained out at the final pass of the evening.  
+
* 6th of October 2015: The front slow threshold on detector 6 was increased to 0x50. Detector 6 is still showing flare counts at higher energies, so while the front slow rate remains high, the decision was made to leave the threshold at the current value for now.
 +
 
 +
15-278-21:29:49 start idib_chg_thrshld(6, FRONT, SLOW, 0x40)  ; was 0x30
 +
15-278-21:29:53 /IDPUDUMPTABL TABLE=DIBTBL6
 +
15-278-21:29:53 /IDPUTABLE6 OFFSET=FRONTSLOWDAC
 +
15-278-21:30:03 /IDPLOAD VALUE=0x40
 +
 
 +
* 7th October 2015: The livetime of D3 is currently around 0 and D6 varying around 20%. The next tohban should investigate increasing the from fast thresholds on these detectors. Also the D1 and D7 rear livetime has dropped over the last few days.  
== Attenuator Issues ==
== Attenuator Issues ==
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This resulted in the thin attenuator moving out, as expected.
This resulted in the thin attenuator moving out, as expected.
 +
* 6th of October 2015: The thin attenuator was stuck IN again during the Berkeley passes. No changed were made to the threshold values but the thin attenuator was commanded out. It remained out at the final pass of the evening.
-
 
+
The current attenuator threshold values are currently on the edge of being triggered by background noise. The next tohban might consider increasing the Thin In level for the attenuator motions (set to 7%).
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== Spacecraft Management ==
== Spacecraft Management ==
-
It's about time for a spinup.
+
There was a spin up on DOY 273 up to ~15 rpm.

Revision as of 21:18, 7 October 2015


Tohban Reports
Start Date: 30 Sep 2015
End Date: 7 Oct 2015
Tohban: Juan Carlos Martinez Oliveros and Hazel Bain
Tohban email: hbain@ssl.berkeley.edu
Next Tohban: Lindsay Glesener
List all reports



Contents

Solar Activity

In the first half of the week solar activity was moderate with 7 M class flares, mostly originating in active region NOAA 12422. AR 12422 rotated over the limb on the 4th of October, after which the Sun became very quiet with a background solar flux at the low B class level. There are currently only 2 active regions on the disk, one of which will rotate over the limb within the next 24 hours. Quiet Sun conditions are expected to continue for the next few days.

How many GOES flares occurred?

 Flares above B, C, M, X class were      4    38     7     0

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

 Flares above B, C, M, X class were      0    14     5     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      0     4     3     0

There were RHESSI flares/GOES flares 43 / 49 over the time range 30-Sep-15 07-Oct-15

Memory Management

The SSR is a bit high due to high solar activity, with a max of 69% and is now at a minimum of 28% after the last pass yesterday due to events being turned off on D4.


Temperatures

The cold plate temps have come up a bit. CP1 = 135.9K, CP2 = 134.2K.


Data Gaps

GAP START TIME GAP END TIME GAP (SEC) 2015-10-02T04:05:00.000 -- 2015-10-02T04:10:00.000 300.00000 NO GAPS IN APP_ID = 154 (VC1-PMTRAS) NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

Detector issues

15-276-01:48:22 start idib_chg_thrshld(3, FRONT, SLOW, 0x0C) ; was 0x1C 15-276-01:48:26 /IDPUDUMPTABL TABLE=DIBTBL3 15-276-01:48:26 /IDPUTABLE3 OFFSET=FRONTSLOWDAC 15-276-01:48:37 /IDPLOAD VALUE=0x0C

15-278-21:28:34 /iattmove move=out2

15-278-21:28:51 start idib_chg_thrshld(3, FRONT, SLOW, 0x15)  ; was 0x0C 15-278-21:28:55 /IDPUDUMPTABL TABLE=DIBTBL3 15-278-21:28:55 /IDPUTABLE3 OFFSET=FRONTSLOWDAC 15-278-21:29:13 /IDPLOAD VALUE=0x15

15-278-21:29:49 start idib_chg_thrshld(6, FRONT, SLOW, 0x40)  ; was 0x30 15-278-21:29:53 /IDPUDUMPTABL TABLE=DIBTBL6 15-278-21:29:53 /IDPUTABLE6 OFFSET=FRONTSLOWDAC 15-278-21:30:03 /IDPLOAD VALUE=0x40

Furthermore G4 was primarily responsible was the increasing SSR fill level (max ~68%). Over the weekend the behavior of D4 changed causing very high fast valids and live time at or near 0%. This low live time has prevented G4 from putting a lot of noise into the SSR. However over the previous few days, the fast valids declined and the livetime rose to around 74%. This has allowed G4 to begin putting more than 9k events per second. Because of this, we further increased the G4 front slow valid, in steps up to max threshold 0xFF. This had no effect whatsoever (slow valid counts appear to be stuck on just one value). This is similar to some of the strange behavior was previously saw in G9.

15-279-00:37:28 start idib_chg_thrshld (4, FRONT, SLOW, 0xE0)  ; was 0xD0 15-279-00:37:32 /IDPUDUMPTABL TABLE=DIBTBL4 15-279-00:37:32 /IDPUTABLE4 OFFSET=FRONTSLOWDAC 15-279-00:37:42 /IDPLOAD VALUE=0xE0

15-279-00:38:20 start idib_chg_thrshld (4, FRONT, SLOW, 0xF0)  ; was 0xE0 15-279-00:38:24 /IDPUDUMPTABL TABLE=DIBTBL4 15-279-00:38:24 /IDPUTABLE4 OFFSET=FRONTSLOWDAC 15-279-00:38:29 /IDPLOAD VALUE=0xF0

15-279-00:39:19 start idib_chg_thrshld (4, FRONT, SLOW, 0xFF)  ; was 0xF0 15-279-00:39:23 /IDPUDUMPTABL TABLE=DIBTBL4 15-279-00:39:23 /IDPUTABLE4 OFFSET=FRONTSLOWDAC 15-279-00:39:30 /IDPLOAD VALUE=0xFF

15-279-00:40:54 start idib_chg_thrshld (6, FRONT, SLOW, 0x50)  ; was 0x40 15-279-00:40:58 /IDPUDUMPTABL TABLE=DIBTBL6 15-279-00:40:58 /IDPUTABLE6 OFFSET=FRONTSLOWDAC 15-279-00:41:08 /IDPLOAD VALUE=0x50

In order to deal with the high SSR fill level we halted collection of detector 4 events. We also loaded a modified version of RTS 26 so that G4 events would stay off, when the other detector events were turned back on, after each eclipse exit. We noted an immediate decrease in the SSR write rate, as soon as G4 events were turned off. This SSR fill level has since begun to decrease.

Turn off G4 events

15-279-02:16:10 /itmoff value=dib4

Load modified RTS 26 so the G4 events stay off

15-279-02:17:05 start sc_tbl_loadpkt("T15271SLTN61_No_G4_G9.00")

15-278-21:29:49 start idib_chg_thrshld(6, FRONT, SLOW, 0x40)  ; was 0x30 15-278-21:29:53 /IDPUDUMPTABL TABLE=DIBTBL6 15-278-21:29:53 /IDPUTABLE6 OFFSET=FRONTSLOWDAC 15-278-21:30:03 /IDPLOAD VALUE=0x40

Attenuator Issues

15-276-01:49:28 start attenuator013_2015_276

Thin In: 15 (was 13) -> 5.89% Thin Out: 14 (was 11) -> 5.5% Thick Out: 15 (was 12) -> 5.89%

15-278-23:07:35 start attenuator013_2015_278

This resulted in the thin attenuator moving out, as expected.

The current attenuator threshold values are currently on the edge of being triggered by background noise. The next tohban might consider increasing the Thin In level for the attenuator motions (set to 7%).


Other notes

Spacecraft Management

There was a spin up on DOY 273 up to ~15 rpm.


Decimation Active/Vigorous
HLAT Decimation Rear decimation weight 6, no front decimation
Night time data (fronts) +/- 4 minutes
Night time data (rears) +/- 4 minutes
Require extra passes? No
Requirement for moving pointer? No
Attenuator operation Looks ok.
Detector problems? See notes above.
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