Email: Summary of Radiation Situation: Nov 5 2023 10:02 am
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Strongly elevated ACE radiation levels were noted this morning and a telecon was convened at the comm pass beginning 2023:309:12:05:00 (7AM local).  The decision was made to run SCS 107, which was commanded at 309:12:30:44 and ran nominally.  The spacecraft is stable, the science instruments are safe, and no issues are evident.

Radiation levels are expected to fall quickly.  The current recovery plan calls for resuming science after the 2023:311:03:15:00 contact (10:15PM local on Monday).  FOTMP and MTA will consult on radiation developments at approximately noon today and inform the community.  The return to science plan is expected to include rescheduling of ObsID 29037, a DDT observation of HE 0230-2130 that was scheduled to begin at 2023:310:02:58.

A status update and discussion of return to science will take place after the 9AM tagup on Monday morning.


Email: 11/5 Midday Update of the radiation situation: Nov 5 2023 1:35 pm
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The midday update on space weather is complicated:
The Geomagnetic storm underway now is in response to the impact of a CME at 0900Z. The initial assessment was that this could be the slightly early arrival of a full-halo CME from 11/3 or a weaker CME from 11/2. The solar wind speed measured by ACE shows 2 shocks, one ~0800Z at one at ~1200Z so it appears both CMEs have arrived. The 11/3 CME had a median predicted arrival time of about 1800Z on 11/5 (about now) so the 1200Z arrival is not unreasonable.   All signs point to rates dropping slowly, as from a limb CME, with no final shock to clear things. That said, the last measurement was 30,000.  I suspect we’ll be below 17,000 and descending by 10:15pm tomorrow.

John Scott and I have agreed that mission planning should press on.

Shift Report (2023-11-06)
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CAPs:
-[593A]| 309/1230z | Manual SCS-107 Activation    
This CAP will be used to Safe the Science Instruments due to high radiation
environment

Radiation:
A geomagnetic storm Sunday required a manual SCS 107 intervention.
It was in response to the impact of a CME at 309:0900Z. 
The solar wind speed measured by ACE shows 2 shocks corresponding to
relatively weak flares, one ~0800Z at one at ~1200Z. 
At 310:1400 the P3 measurement was ~3,000 and trending down.
There is no expectation that radiation will inhibit recovery as
planned tonight.  Solar activity in the coming days is expected to
be low with a chance for M-class flares on days one, two, and three (06 Nov, 07 Nov, 08 Nov).