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Propagation Labornlory, wilh support fiom ihe Air Force Cambridge Research Center.

Usunlly radio telescopes are equipped to receis eonly naturally occurring elec-tromagnetic radiation from the cosmos. But with the high-powered transmitter, it will he possible to lx>unce signals against heavenly bodies. as was recent-l\ done with the planet Venus.

This tcchnique is ł)ecoming inereas-ingly importani in studies of the solar system, and the Stanford group will at-tempt to obtain radar echoes from Mars and from the sun itself. The ra-dat-eclio method is called -'radar as-tronomy" to distinguish it from "radio astronomy.*" which does not imohe re-floction of man-made signals but oniy reception of natura! radiation.

Sonie of the research tindings the group foresees are: (1) morę accuratc measurements of cosmic distanccs; (2) surface e.\plorations of the moon and