Tohban Report 2016-05-18

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Tohban Reports
Start Date: 11 May 2016
End Date: 18 May 2016
Tohban: Mitsuo Oka
Tohban email:
Next Tohban: TBD
List all reports


Solar Activity

The activity has been low throughout the week, mostly at B-level. There are currently 2 ARs on disk.

How many GOES flares occurred?

 Flares above B, C, M, X class were     25    13     0     0

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

 Flares above B, C, M, X class were     12     8     0     0

And how many had EXCELLENT coverage?

 Flares above B, C, M, X class were     11     5     0     0

There were RHESSI flares/GOES flares 90 / 38 over the time range 10-May-16 17-May-16

There are issues with the process creating the RHESSI flare list for this week, and these issues will persist until the detector situation is stable, so the RHESSI flare count is an overestimate.

Memory Management

Decimation was active/vigorous for the full time period. The SSR is empty after each day's passes, with a maximum of 11%.

Spacecraft Status

Detectors 1, 3, 8 and 9 are powered on, and are recording events. The cold plates, 1 and 2 are at 136.0 and 134.7 K, respectively (They were 134.6 and 133.2 K last week).

Data Gaps

N_GAPS           2
GAP START TIME              GAP END TIME                   GAP (SEC)
2016-05-17T00:30:00.000 -- 2016-05-17T00:50:00.000       1200.0000
2016-05-17T18:45:00.000 -- 2016-05-17T18:50:00.000       300.00000

Detector issues

Detectors 1, 3, 8 and 9 are powered on, and are recording events. No excess large numbers of resets or fast or slow rates at present. Detector 2 was also powered up during the week, but did not segment at 5000V, so were turned off. Detector 4 is being turned on again today to see the thermal impact and to obtain more flare spectra to evaluate the low-energy performance (The D4 HV will reach 4000V at 11:50am, during the Ops meeting).

Attenuator Thresholds

 Attenuator State    HEX value       deadtime
    Min A0             0x00           0.00 %
    Max A0             0x10           6.27 %
    Min A1             0x07           2.74 %
    Max A1             0x15           8.24 %
    Min A2             0x05           1.96 %
    Max A2             0x29          16.08 %
    Min A3             0x09           3.53 %
    Max A3             0xFF         100.00 %

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? No
Attenuator operation Working as expected
Detector problems? See notes above.
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