Accession Number : AD0431799

Title :   THE LIGHTWEIGHT TRANSOSONDE SYSTEM.

Descriptive Note : Final rept.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Allen,J. W. ; Welch,G.

Report Date : 30 JAN 1964

Pagination or Media Count : 143

Abstract : A new lightweight transosonde airborne system was developed. The new system, which consists of a lightweight plastic balloon and two small (1 cu ft) instrument packages, has been tested in a series of 50 flights over the Atlantic. After initial problems of balloon configuration and equipment limitations were resolved, a high percentage of successful flights was achieved. The balloon is a pressurized sphere (12.5 ft diameter) made of 0.002-in.-thick Mylar plastic. It weighs approximately 20 lb and will withstand 50 to 60 millibars internal pressure. The instrumentation consists of: (1) a dual-frequency crystal-controlled 30-watt high-frequency transmitter, (2) a power supply consisting of a battery made up of silver zinc cells supplying the low dc voltage (7.5), and a dc-to-dc converter supplying the high voltage (300 v, 600 v), and (3) a Morse code encoder and appropriate meteorological sensors (ambient pressure, ambient temperature, and balloon internal pressure). The instrumentation is housed in two plastic (polyurethane) packages. Each package, including instrumentation, weighs about six pounds. (Author)

Descriptors :   (*METEOROLOGICAL BALLOONS, INSTRUMENTATION), (*RADIOSONDES, METEOROLOGICAL BALLOONS), SPHERES, PLASTICS, RADIO TRANSMITTERS, HIGH FREQUENCY, METEOROLOGICAL BATTERIES, FLIGHT TESTING, COSTS, UPPER ATMOSPHERE, TELEMETERING TRANSMITTERS, RADIO EQUIPMENT, CODING, METEOROLOGICAL INSTRUMENTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE