Accession Number : AD0439848

Title :   THE DESIGN OF A FOUR-CHANNEL TELEMETRY SYSTEM FOR USE IN THE HASP METEOROLOGICAL RADIOSONDE SET,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Gadbors,George A.

Report Date : 25 FEB 1964

Pagination or Media Count : 23

Abstract : Presented herein is a description of a simple and economical four-channel telemetry system for use in the HASP meteorological radiosonde. The need for four channels evolves from the recent development of a continuous pressure sensor. The temperature and reference channel remains as in the present system, along with the addition of an atmospheric pressure and chamber temperature reference channel. The four-channel circuitry is designed to sample information following an asymmetrical sequence ab, ac, ad, etc. The numerical value (a) represents the temperature channel, which is designed to have a higher sampling rate. Basically, the circuit retains the present design of the two-channel HASP system, however, with the addition of a transistorized three-stage pulse stepper that controls three iterative transistor switching networks. A simple gate is utilized to inhibit all remaining channels during the transmission of the air temperature. An analysis is presented of the four-channel system with a discussion of the experimental results obtained over an environmental temperature range from -60 degrees C to 100 degrees C. (Author)

Descriptors :   (*TELEMETER SYSTEMS, SOUNDING ROCKETS), (*RADIOSONDES, TELEMETER SYSTEMS), METEOROLOGICAL INSTRUMENTS, RELAXATION OSCILLATORS, AIRBORNE

Distribution Statement : APPROVED FOR PUBLIC RELEASE