Abstract: The Direct-Flow Sampler is an improved balloon-borne device designed to collect particulate matter from very large volumes of stratospheric air at altitudes between 50,000 and 100,000 ft. This equipment utilizes a high-volume ...

Abstract: The air ejector filter sampler is a balloon-borne device designed to collect particulate matter from very large volumes (105 ft2) of stratospheric air at altitudes between 50,000 and 130,000 ft. This equipment utilize an ...

Abstract: A recording infrared absorption hygrometer which measures the absolute humidity in a 1-meter light path is described. Record is obtained on a remote self-balancing potentiometer. Use is made of the 1.37 µ water vapor ...