[HN Gopher] JWST Solid State Recorder
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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
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(page generated 2022-07-12 23:00 UTC)