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A family of spacecraft in the 1980s were designed around the Multi-mission Modular Spacecraft (MMS) bus. This bus was designed specifically to allow for retrieval and repair of the spacecraft by the Space Shuttle. (reference) As far as I know, the only MMS-based satellite that was actually repaired by a Shuttle mission was the Solar Maximum Mission. This ...


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My reading of the Aviation Week article on this seemed to suggest that while Landsat-7 was not designed to be refueled, when they looked at its design, they found a fuel line, they could patch into that could be used to fill the tanks again. They need to cut away the insulation to get to the pipe, and then will probably use some variant of a vampire tap to ...


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Recovering old satellites for servicing isn't currently worthwhile, but it wasn't particularly relevant forty years ago either. The downmass requirement was never about recovering old satellites. A new satellite is expensive, but after years of micrometeorites, irradiation, vacuum welding and a 500 degree temperature change every hour or so, it isn't worth ...


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Unlike Hubble, JWST is not designed for service. The only preparation for servicing are the targets on the launcher interface ring. Those are just some stickers they can add to the surfaces around the interface ring, so that's trivial to do. All the difficult work hasn't been done. There are no big access doors for easily swapping instruments (unlike on ...


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