Accession Number : AD0664113

Title :   A HIGH RESOLUTION CONTINUOUS PRESSURE SENSOR MODIFICATION FOR RADIOSONDES,

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

Personal Author(s) : Glass,Roy I. ; Lamberth,Roy L. ; Reynolds,Ralph D.

Report Date : AUG 1967

Pagination or Media Count : 29

Abstract : The paper describes how continuous pressure measurements may be obtained by making a relatively simple modification to any standard or clock-switched radiosonde which can be flown on a rising or floating balloon. The continuous pressure device is composed of an aneroid sensor which controls the frequency of a subcarrier oscillator. Frequency modulation of the radiosonde transmitting tube is used instead of amplitude modulation. The receiver for this system utilizes the standard GMD-1B ground tracker with a special demodulator, the standard TMQ-5 recorder, and a frequency counter with printer. Each pressure sensor is calibrated for frequency versus pressure; precision of reading the pressure is to one millibar as currently used but readings to 0.1 mb are easily obtainable. Pressure data from three superpressure balloon flights are presented to show the detail obtained by the instrument with this modification. This modified instrument provides the research meteorologist with a new inexpensive research tool. (Author)

Descriptors :   (*METEOROLOGICAL BALLOONS, RADIOSONDES), (*DETECTORS, PRESSURE), FREQUENCY MODULATION, INSTRUMENTATION, CALIBRATION, THERMISTORS, RESOLUTION, TEMPERATURE, MEASUREMENT, MODIFICATION KITS, RADAR TRACKING, NEW MEXICO

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE