Tohban Report 2017-01-04

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Tohban Reports
Start Date: 28 December 2016
End Date: 4 January 2017
Tohban: Jim McTiernan
Tohban email: jimm@ssl.berkeley.edu
Next Tohban: TBD
List all reports



Contents

Solar Activity

Quiet Sun conditions prevail:

How many GOES flares occurred?

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

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

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

And how many had EXCELLENT coverage?

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

There were RHESSI flares/GOES flares 2 / 12 over the time range 26-Dec-16 02-Jan-17


Memory Management

Decimation was quiet/vigorous for the full time period, with the SSR hovering at about 50% for most of the week. On 2-Jan-2017, RHESSI's ATS went IDLE, from 002-00:00 to 002-17:30 UTC. As a result SSR climbed to 76%. The SSR was reset to 0% (by restting the read pointer) at approximately 17:00 UT on 3-Jan-2017. This resulted in a data gap from approximately 23:27 on 30-Dec-2016 until approximately 15:37 on 3-Jan-2017. Detectors 3 and 9 are recording events during spacecraft day, and for 4 minutes prior to and after daylight.

Spacecraft Status

Detectors 3 and 9 are recording events. The cold tips are 128.6 and 126.2 K as of 3-Jan-2017, 17:00 UT. The cold plates, 1 and 2 are 154.3 and 155.3 K. Cryocooler power is steady at 80W, cryocooler efficiencies are in the range 0.026 to 0.0275. Cryocooler transients are frequent, resulting in a standard deviation of approximately 1 degree in the daily average cold tip temperatures. See:

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

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

It has been noted recently that the SSR has been filling at a fast rate, resulting in low-energy decimation, and the SSR staying near 50%, the value at which the decimation starts. The extra memory fill is due to low energy counts:

Figure 1:This is a comparison of the D3F eventlist spectrum for 2016-12-28/23:45 to 23:50 (white line) with the same time range in 2012 (red line). The rate is larger for all channels, but much larger for the low energy channels < 50.


Figure 2:This is a comparison of the D9F eventlist spectrum for 2016-12-28/23:45 to 23:50 (white line) with the same time range in 2012 (red line). The rate is larger for all channels, but much larger for the low energy channels < 50.

In the figures, the low energy count rates are much higher in 2016 than they were in 2012.


Data Gaps

DATA GAPS FOR 2016/12/26

TIME RANGE: 2016-12-26T00:00:00.000 -- 2016-12-27T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2016-12-26T13:25:00.000 -- 2016-12-26T13:35:00.000       600.00000
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2016-12-26T04:50:00.000 -- 2016-12-26T06:10:00.000       4800.0000

DATA GAPS FOR 2016/12/27

TIME RANGE: 2016-12-27T00:00:00.000 -- 2016-12-28T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2016/12/28

TIME RANGE: 2016-12-28T00:00:00.000 -- 2016-12-29T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
NO GAPS IN APP_ID = 102 (VC3-MONITOR RATES)

DATA GAPS FOR 2016/12/29

TIME RANGE: 2016-12-29T00:00:00.000 -- 2016-12-30T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           6
GAP START TIME              GAP END TIME                   GAP (SEC)
2016-12-29T08:20:00.000 -- 2016-12-29T08:30:00.000       600.00000
2016-12-29T13:10:00.000 -- 2016-12-29T16:40:00.000       12600.000
2016-12-29T17:25:00.000 -- 2016-12-29T17:40:00.000       900.00000
2016-12-29T19:15:00.000 -- 2016-12-29T19:30:00.000       900.00000
2016-12-29T22:20:00.000 -- 2016-12-29T22:25:00.000       300.00000
2016-12-29T23:35:00.000 -- 2016-12-29T23:50:00.000       900.00000

DATA GAPS FOR 2016/12/30

TIME RANGE: 2016-12-30T00:00:00.000 -- 2016-12-31T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2016-12-30T05:05:00.000 -- 2016-12-31T00:00:00.000       68100.000

DATA GAPS FOR 2016/12/31

TIME RANGE: 2016-12-31T00:00:00.000 -- 2017-01-01T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
NO GAPS IN APP_ID = 154 (VC1-PMTRAS)
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)

2016-12-31T00:00:00.000 -- 2017-01-01T00:00:00.000 86400.000

DATA GAPS FOR 2017/01/01

TIME RANGE: 2017-01-01T00:00:00.000 -- 2017-01-02T00:00:00.000
GAPS IN APP_ID = 1 (VC1-SOH) WITH PACKET RATE LT 30
N_GAPS           3
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-01-01T14:30:00.000 -- 2017-01-01T14:40:00.000       600.00000
2017-01-01T16:10:00.000 -- 2017-01-01T16:15:00.000       300.00000
2017-01-01T17:50:00.000 -- 2017-01-01T17:55:00.000       300.00000
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-01-01T14:30:00.000 -- 2017-01-01T14:35:00.000       300.00000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-01-01T00:00:00.000 -- 2017-01-02T00:00:00.000       86400.000

DATA GAPS FOR 2017/01/02

TIME RANGE: 2017-01-02T00:00:00.000 -- 2017-01-03T00:00:00.000
NO GAPS IN APP_ID = 1 (VC1-SOH)
GAPS IN APP_ID = 154 (VC1-PMTRAS) WITH PACKET RATE LT 4
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-01-02T13:15:00.000 -- 2017-01-02T17:20:00.000       14700.000
GAPS IN APP_ID = 102 (VC3-MONITOR RATES) WITH PACKET RATE LT 30
N_GAPS           1
GAP START TIME              GAP END TIME                   GAP (SEC)
2017-01-02T00:00:00.000 -- 2017-01-03T00:00:00.000       86400.000

Detector issues

Detectors 3 and 9 are powered on, and are recording events. No threshold or HV changes during the week.

Notes

Spacecraft Management

Decimation Quiet/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? See above
Attenuator operation Working as expected
Detector problems? See notes above.
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