What was the radiation level from SRTM at ground level?
The radars produced about 10,000 watts, about the same as 15 microwave ovens. This power was spread out over an oval area about 6 X 20 kilometers (120 square kilometers or 30 square miles). The power measured on the ground was about one 50,000th the level of a radio station and about one ten millionth the level of a cell phone. In addition, SRTM only illuminated a given area for about 1/10 of a second.