To RHESSI fans:
RHESSI made 16 years of X-ray and gamma-ray observations before the mission ended in 2018 due to loss of communications. Although the spacecraft has continued to orbit the Earth since then, it is expected to finally re-enter the atmosphere very soon and burn up, possibly as soon as tomorrow! Here is NASA's press release:
https://www.nasa.gov/feature/nasa-retired-solar-energy-imager-spacecraft-to-...
Pascal Saint-Hilaire and Hugh Hudson wrote a RHESSI nugget on the re-entry, including plots of the ground path underneath RHESSI for the next couple of days. With luck, you may be able to catch a glimpse of RHESSI as it burns up, while some parts of the observatory - notably the tungsten grids - may even survive re-entry.
https://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI%27s_Re-entry
I encourage you all to commemorate and celebrate RHESSI's long mission, which can include analyzing some portion of RHESSI's gigantic data set. I also recommend that you register for the upcoming SPHERE workshop (June 20-23), which builds off of the legacy of RHESSI:
https://sphere.boulder.swri.edu/
Thanks!
Albert Y. Shih RHESSI Deputy Mission Scientist