Accession Number : AD0654991

Title :   A COMPARATIVE EVALUATION OF THE AUTOMATIC TRACKING PILOT-BALLOON WIND MEASURING SYSTEM,

Corporate Author : ATMOSPHERIC SCIENCES LAB WHITE SANDS MISSILE RANGE N MEX

Personal Author(s) : Kubinski,Stanley F.

Report Date : APR 1967

Pagination or Media Count : 58

Abstract : Limitations of the existing operational double theodolite systems and the need for a better method of measuring wind parameters resulted in the development of the automatic tracking pilot-balloon wind measuring system, utilizing a T-9 radar. The T-9 system was evaluated by comparing wind component profiles generated by the T-9 system and the double theodolite systems tracking the same pilot-balloon to an altitude of 4,000 ft. AGL. Wind component values thus derived were compared. Values of the wind component velocities at points at 500 ft. intervals and the mean component velocities over 500 ft. layers for each profile were recorded. The absolute differences of the values at corresponding points and layers were tabulated. Analysis of the tabulated data shows a mean difference in the order of magnitude of 1.5 MPH. The limitations of the double theodolite systems are discussed, and the apparent advantages gained by the use of the T-9 system are described. Results of the comparison show the T-9 system provides a reliable method of obtaining accurate wind data to 4,000 ft. AGL, with a rapid evaluation of wind parameters. The T-9 system has the capability of measuring wind parameters to 10,000 ft. AGL. It also reduces the complexity of the hardware used in the real time data system (RTDS) and simplifies the RTDS program. (Author)

Descriptors :   (*WIND, MEASUREMENT), WIND DIRECTION INDICATORS, TRACKING, THEODOLITES, BALLOONS, METEOROLOGICAL PHENOMENA, RADAR TRACKING

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE