https://sprg.ssl.berkeley.edu/~tohban/wiki/index.php?title=Tohban_Report_2016-12-28&feed=atom&action=historyTohban Report 2016-12-28 - Revision history2024-03-29T14:36:30ZRevision history for this page on the wikiMediaWiki 1.16.0https://sprg.ssl.berkeley.edu/~tohban/wiki/index.php?title=Tohban_Report_2016-12-28&diff=9425&oldid=prevMfivian: Created page with "{{Infobox Tohban Report| |start_date = 21 December 2016 |end_date = 28 December 2016 |tohban_name = Martin Fivian |tohban_email = mfivian@ssl.berkeley.edu |next_tohban = Jim McT..."2017-01-04T10:26:05Z<p>Created page with "{{Infobox Tohban Report| |start_date = 21 December 2016 |end_date = 28 December 2016 |tohban_name = Martin Fivian |tohban_email = mfivian@ssl.berkeley.edu |next_tohban = Jim McT..."</p>
<p><b>New page</b></p><div>{{Infobox Tohban Report|<br />
|start_date = 21 December 2016<br />
|end_date = 28 December 2016<br />
|tohban_name = Martin Fivian<br />
|tohban_email = mfivian@ssl.berkeley.edu<br />
|next_tohban = Jim McTiernan<br />
}}<br />
<br />
== Solar Activity ==<br />
<br />
The Sun was very quiet with a goes base level around B8. Some B-flare occurred on Dec 26 and Dec 27.<br />
<br />
<br />
<br />
== Memory Management ==<br />
<br />
Decimation was quiet/vigorous for the full time period.<br />
The detectors are producing more counts without decimating<br />
than we can downlink, given all BGS passes are at night.<br />
In order not to decimate during Alma co-observations, we moved the read pointer<br />
from 2016-354-15:34 to 355-12:30 UTC.<br />
Alma co-observations start at 355-12:48 (Dec 20).<br />
<br />
In an effort to reduce background counts, we lowered HV on det. 9 which didn't<br />
appear to have a significant effect. We further raised the slow valid threshold<br />
on 3F and 9F.<br />
<br />
Detectors 3 and 9 are recording events during spacecraft day, and for 4 minutes prior to and after daylight.<br />
<br />
== Spacecraft Status ==<br />
<br />
Detectors 3 and 9 are recording events.<br />
The cold tips are <br />
Cryocooler power is steady at 80W.<br />
Cryocooler transients are still frequent.<br />
<br />
<br />
== Data Gaps ==<br />
<br />
skipped over data recorded between 2016-354-15:34 and 355-12:30 UTC.<br />
<br />
== Detector issues ==<br />
<br />
Detectors 3 and 9 are powered on, and are recording events. Background rates<br />
are on the high side, between 1200 and 2000. In order to bring down the<br />
background rates, the following actions have been taken:<br />
<br />
Dec 21:<br />
HV Det.9 lowered from 3000 to 2500V. However, the slow valid rates didn't<br />
significantly improve.<br />
2016-356-21:20:31 /ihvdac detector=9, voltage=129 ; 2500 V<br />
<br />
Dec 22:<br />
The threshold for G3 Front slow was increased from 0x0C to 0x15,<br />
which brought the slow valid counts down.<br />
2016-357-20:52:39 /IDPULOAD VALUE=0x15 ; was 0x0C<br />
<br />
Dec 26:<br />
The G9 front slow threshold was increased from 0x15 to 0x1C.<br />
2016-361-17:19:30 /IDPULOAD VALUE=0x1C ; was 0x15<br />
<br />
<br />
== Notes ==<br />
<br />
Dec 21:<br />
The attenuator thresholds have been adjusted according to a reference<br />
background dead time of 14.5%. The thresholds are now as follows.<br />
<br />
Max A0 19.61<br />
Min A1 16.08<br />
Max A1 21.57<br />
Min A3 16.86<br />
<br />
== Spacecraft Management ==<br />
<br />
{| class="wikitable"<br />
|-<br />
| Decimation || Very Quiet/Vigorous<br />
|-<br />
| HLAT Decimation || Rear decimation<br />
|-<br />
| Night time data (fronts) || 4min of data<br />
|-<br />
| Night time data (rears) || 4min of data<br />
|-<br />
| Require extra passes? || No<br />
|-<br />
| Requirement for moving pointer? || Yes<br />
|-<br />
| Attenuator operation || Working as expected<br />
|-<br />
| Detector problems? || See notes above.<br />
|}<br />
<br />
<br />
[[Category:Tohban Report]]<br />
[[Category:Tohban]]</div>Mfivian