Army Air Force meteorologists prepare to launch hydrogen-filled balloonBalloon transported radiosonde that transmitted back to stationRadiosonde measured temperature, humidity, and pressureThis instrument was used up until just before the end of WWII
10/23/2018 10:08:01 AM
Photographer: United States Army
Date: 1944?
Location: Iceland, Meeks Field
Subject: Instruments
Subject: Balloons
Subject: War