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A comment on 5G Is Likely to Put Weather Forecasting at Risk. Parent comment

Re:5G Is Likely to Put Weather Forecasting at Risk by sandworm101 on Tuesday April 16, 2019 @01:29PM (#19675529)
Yes and no. Those large dishes on earth require massive support structures. In the zero gravity of space large dishes can float virtually unsupported. There are spy sats with extremely large reflectors. The biggest geostationary ones can been seen from earth, meaning they have reflectors on the order of 100m+ in diameter. Turn one of these around and we would have a very capable radio telescope, much as how a redesign of another spysat program gave us hubble.

https://en.wikipedia.org/wiki/USA-202

https://en.wikipedia.org/wiki/Orion_(satellite)

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Re:5G Is Likely to Put Weather Forecasting at Risk by brandmeyer on Tuesday April 16, 2019 @01:36PM (#19675609)
For the low, low price of 2 gigabucks each.

For an idea of scale, the entire VLA was built for ~80 megabucks. The entire Atacama Large Millimeter Array was built for 1.4 gigabucks.

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Re:5G Is Likely to Put Weather Forecasting at Risk by isatty on Tuesday April 16, 2019 @01:59PM (#19675793)
Gigabucks and megabucks is how I’ll be talking of money from now on.
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Re:5G Is Likely to Put Weather Forecasting at Risk by TeMPOraL on Tuesday April 16, 2019 @04:07PM (#19676832)
Totally worth it, even if to just add momentum to building space infrastructure and increase world's competence in space technologies.

Things have changed quite a bit over past 20 years. Launches are getting much cheaper now, and satellites are getting smaller. I imagine costs could be brought down, especially if the scope of the mission was limited to e.g. simple constellation for radiointerferometry.

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