Don Y snipped-for-privacy@foo.invalid wrote: |------------------------------------------------------------------------| |"On 5/11/2026 3:16 PM, Nioclás Pól Caileán de Ghloucester wrote: | |> An ex-boss would like to use systems by you, because he is frustrated | |> that satellites' software (usually without an operating system with an| |> Ada-run-time executive) cannot easily be safely patched while running.| | | |Very few things can be patched or updated while ALSO providing their | |intended services. Perhaps hot-swapped disks and power supplies are | |the exception. Surely NOT software or firmware." | |------------------------------------------------------------------------|
This ex-boss then at the European Space Agency could probably tolerate a few minutes of readings being canceled/ignored/suspended for a live software update if such live software updates happen only months apart or years apart. That it is not as easy as he wants disappoints him, as he says he wants to be able to update software on a satellite like he can upgrade Spreadsheet Program Version Crap on Windows to Spreadsheet Program Version Crappier But With Improved Eye Candy, but I tried to convey to him that the behavior of Windows is ill defined (uncontrollable) and you do not run a spreadsheet program while you are uninstalling it and installing the next version.
|--------------------------------------------------------------------| |"Being able to swap "components" also lets you take advantage of new| |technologies [. . .]" | |--------------------------------------------------------------------|
Such hardware swapping is not available to us after a spacecraft has become launched. (The repair of the Hubble Space Telescopes by astronauts is an exception, and has nothing to do with us.)
|----------------------------------------------------------| |"[. . .] | |[. . .] And, if someone opened your box and added | |a jumper that violated this, you would throw your hands up| |and plead "it's not my fault!" [. . .] | |[. . .]" | |----------------------------------------------------------|
The then boss of this ex-boss said that all European-Space-Agency spacecraft have an American component called "the Blame Component"! (S.