Cover of Volume 2, No. 6, of the Army Air Forces Weather Service Bulletin. Tracking a pilot balloon with a bedspring radio direction finder SCR-658 used for determining winds aloft. The observer is able to follow a free balloon-trans mitter very accurately by adjusting the azimuth and elevation of the "bedspring antennae.

Image ID: wea03640, NOAA's National Weather Service (NWS) Collection
Photo Date: 1944 December
Credit: Headquarters Weather Wing Army Air Forces; Courtesy of the family of Nels Johnson, United States Weather Bureau (dec.)

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