RHESSI to be Decommissioned

Newmark, Jeffrey (GSFC-6710) jeffrey.newmark at nasa.gov
Thu Aug 9 15:55:20 MDT 2018


I second Craig’s thoughts, RHESSI has been a shining example of what we can do both scientifically and technologically, and a testament to Bob Lin’s legacy! Well done RHESSI team.

From: MMScience <mmscience-bounces at mithra.physics.montana.edu> on behalf of Craig DeForest <deforest at boulder.swri.edu>
Date: Thursday, August 9, 2018 at 5:44 PM
To: "Dennis, Brian R. (GSFC-6710)" <brian.r.dennis at nasa.gov>
Cc: Samuel KRUCKER <krucker at berkeley.edu>, "Shih, Albert Y. (GSFC-6710)" <albert.y.shih at nasa.gov>, "mmscience at solar.physics.montana.edu" <mmscience at mithra.physics.montana.edu>, "rhessi_data_analysis at solar.physics.montana.edu" <rhessi_data_analysis at mithra.physics.montana.edu>
Subject: Re: RHESSI to be Decommissioned

Thanks for the heads-up, Dennis.  My sadness at the end of the mission is tempered by the knowledge that this was an incredibly successful Explorer.  Congratulations to the entire team!

On Aug 9, 2018, at 1:56 PM, Dennis, Brian R. (GSFC-6710) <brian.r.dennis at nasa.gov<mailto:brian.r.dennis at nasa.gov>> wrote:

After more than 16 years of successful operations, the RHESSI spacecraft is now planned to be decommissioned on October 1 of this year.  The on-board receiver has been slowly degrading since 2017, and commanding from the ground has become increasingly difficult to the point where we have not had a successful command since mid-July.  We will continue to try to establish contact, but success is very unlikely.  The spacecraft has no further scheduled transmissions and is programmed to automatically decommission itself on October 1.

Because of the communication difficulty, the detectors have not been turned back on following the sixth anneal, which started on April 12.  Observations ended on April 11 at 01:50 UT and the last flare in the RHESSI catalog was a B5 on March 3.  We have already started implementing the Mission Archive Plan as described in the latest RHESSI Senior Review Proposal
(http://hesperia.gsfc.nasa.gov/senior_review/2017/senior_review_proposal_2017.pdf).
 For the next few years, RHESSI data products will continue to be accessible on the usual servers.  In the future, the archive will be available through the Solar Data Analysis Center (SDAC).

Sam Krucker, PI
krucker at ssl.berkeley.edu<mailto:krucker at ssl.berkeley.edu>

Brian Dennis, Mission Scientist
brian.r.dennis at nasa.gov<mailto:brian.r.dennis at nasa.gov>

Albert Shih, Deputy Mission Scientist
albert.y.shih at nasa.gov<mailto:albert.y.shih at nasa.gov>

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