Robert W. Wilson of Bell Labs, Holmdel, is making measurements to see whether the useful radio spectrum for satellite and space‐probe communications can be extended to frequencies up to 30 GHz; the aim is to determine the effect of weather (particularly rain) on these high‐frequency signals. The sun is a convenient extraterrestrial radio source for these experiments; so Wilson has made a sun tracker that records solar emission at 16 and 30 GHz.

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