I am sure there are better presentations out there, but this conference proceedings has some great pictures of the control systems in JWST [1]<p>I was also able to find a high resolution picture of the spacewire interface card with its glorious space grade asic packages [2]<p>Sadly the SSR is not shown, I assume that it is basically a gigantic sheet of sram and a fpga.<p>[1] <a href="https://www.researchgate.net/publication/233962152_Status_of_the_James_Webb_Space_Telescope_Integrated_Science_Instrument_Module_System" rel="nofollow">https://www.researchgate.net/publication/233962152_Status_of...</a><p>[2] <a href="https://www.nasa.gov/vision/universe/watchtheskies/jwst_spacewired.html" rel="nofollow">https://www.nasa.gov/vision/universe/watchtheskies/jwst_spac...</a>
How does this storage hold up over time?<p>I'm guessing that could be one of the limiting hardware elements. There must be some redundancy in that right?
> If a contact is missed, science observations can continue without filling the recorder, and the ground can catch up on the next contact.<p>Total noob question but how exactly does this part work? It seems like if you record close to the 4h transmission limit of data between contacts it wouldn't be possible to catch up on next contacts and not fill up the recorder. Is it not possible to record that much data in the timeframe between contacts, or is there some safety margin in the transmission limit they state for this reason?
One of the interesting things about this is all the tooling created around the JWST. Like there is even a downloadable app that you use to plan & book time. Plus all the documentation, etc.