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They are believed to have lifespans as long as Hubble. The last block 4 was launched in 2013. https://en.wikipedia.org/wiki/USA-245 https://en.wikipedia.org/wi
by hindsightbias 5y ago
They are believed to have lifespans as long as Hubble. The last block 4 was launched in 2013.
https://en.wikipedia.org/wiki/USA-245 https://en.wikipedia.org/wiki/USA-245
USA-314, launched this year, is allegedly a KH derivative.
- jandrese 5y agoHubble has only lasted as long as it has because it was serviced on 4 separate occasions--although one of those was to fix a manufacturing defect. I don't think any of the spysats had service missions.