Tohban Report 2015-12-30

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Tohban Reports
Start Date: 23 Dec 2015
End Date: 30 Dec 2015
Tohban: Jim McTiernan
Tohban email:
Next Tohban: TBD
List all reports


Solar Activity

The sun is moderately active; how many GOES flares occurred?

 Flares above B, C, M, X class were      4    24     4     0

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

 Flares above B, C, M, X class were      0    15     4     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were      0     5     1     0

There were RHESSI flares/GOES flares 186 / 32 over the time range 22-Dec-15 29-Dec-15

Memory Management

Decimation was active/vigorous for the full time period. Both front and rear detectors are off during SC night, except for 4 minutes on either side. The SSR is at 60% at the end of the most recent AGO pass today.

On 28 December (day 362) we skipped the playback pointer, during the second Wallops pass, dropping the level from 99% to 22% and then played down to 19%. This resulted in a vc3 data gap from approximately 04:30 UT to approximately 20:00 UT on 27-dec-2015.

Spacecraft Status

The cold plates, 1 and 2 were at 137.5 and 136.0 K, on 2015-12-30.

Data Gaps

No VC1 Gaps

VC3 Gaps



2015-12-27T04:30:00.000 -- 2015-12-27T19:55:00.000 55500.00000

Detector issues

Detector 2 is unsegmented, Detector 9 is off, detectors 3, 4, and 8 are not recording events. D3 was turned off beacuse it was filling the memory with front segment noise; D8 was turned off because it was filling the memory with rear segment ULD events.

15-362-06:05:42 start sc_tbl_loadpkt ("T15357SLTN61_No_G3_G4_G9.00") ; New RTS 26 so G3 events will stay off

15-362-07:43:27 start sc_ssr_poff ; Halted SSR playback

15-362-07:43:34 start sc_ssr_pnt  ; Jumped read pointer to 197176000

15-362-07:44:36 start sc_ssr_play ; Started SSR playback

15-362-07:44:19 start idib_chg_thrshld (5, REAR, FAST, 0xB0)  ; Was 0xA0

15-362-09:13:58 /ihvdac detector=1, voltage=166 ; Lowered G1 HV by 200V from 176

15-362-10:52:03 /itmoff value=dib8

15-362-10:52:09 start sc_tbl_loadpkt("T15362SLTN61_No_G3_G4_G8_G9.01")

We also adjusted the attenuator thresholds using the current iattflux deadtime of 13.7%

15-362-11:03:47 start attenuator013_bg

15-362-11:03:56 /IDPULOAD VALUE=0  ; 0 Minl0

15-362-11:03:56 /IDPULOAD VALUE=48  ; 18.8235 Maxl0

15-362-11:03:56 /IDPULOAD VALUE=39  ; 15.2941 Minl1

15-362-11:03:56 /IDPULOAD VALUE=53  ; 20.7843 Maxl1

15-362-11:03:56 /IDPULOAD VALUE=37  ; 14.5098 Minl2

15-362-11:03:56 /IDPULOAD VALUE=73  ; 28.6275 Maxl2

15-362-11:03:56 /IDPULOAD VALUE=41  ; 16.07843 Minl3

15-362-11:03:56 /IDPULOAD VALUE=255  ; 100 Maxl3

Spacecraft Management

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? Yes, see notes above
Attenuator operation Working as expected
Detector problems? See notes above.
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