[HN Gopher] JWST Solid State Recorder ___________________________________________________________________ JWST Solid State Recorder Author : orzi Score : 31 points Date : 2022-07-12 21:32 UTC (1 hours ago) (HTM) web link (jwst-docs.stsci.edu) (TXT) w3m dump (jwst-docs.stsci.edu) | huhtenberg wrote: | > _... JWST will downlink data in 4-hour contacts... In one | contact, JWST can transmit at least 28.6 Gbytes_ | | This works out to 2 MB/s. | worewood wrote: | Surprisingly high IMO | Shared404 wrote: | I know people who live within 30 minutes of me who get less | than that - and I live in a college town. | jhgb wrote: | They didn't have a 70m sized parabolic dish, though. | jhgb wrote: | The DSN can receive data from MRO at Mars at up to 4 megabits | per second, apparently. JWST is way closer, so it should be | quite a bit faster. | xupybd wrote: | How does this storage hold up over time? | | I'm guessing that could be one of the limiting hardware elements. | There must be some redundancy in that right? | AaronFriel wrote: | Given the capacity, I would be surprised if it wasn't single- | level cell NAND (larger write capacity) or redundant. From | articles I could find, it was installed in the JWST in 2012[1] | and developed by a company called SEAKR which produces "Solid | State Recorders"[2]. Certainly doesn't look like any commercial | server storage I've seen. | | I imagine the contracts could be FOIAed here and specs like | anticipated write capacity obtained, would be very interesting | to learn about about radiation hardening and redundancy for | SSDs - err, solid state recorders - in space. | | [1] | https://www.electronicsweekly.com/news/business/information-... | [2] https://www.seakr.com/our-technology/#products ___________________________________________________________________ (page generated 2022-07-12 23:00 UTC)