Accession Number : AD0023567

Title :   WIND STRUCTURE STUDY FOR ROCKETS

Corporate Author : NORTH AMERICAN INSTRUMENTS INC ALTADENA CALIF

Personal Author(s) : BOLLAY,EUGENE ; SHAFFER,PHILIP A. JR.

Report Date : 05 AUG 1953

Pagination or Media Count : 14

Abstract : An effort is being made to determin the time and space variation of the wind near the ground in order to determine the wind value to use in adjusting a rocket launcher so that the rocket trajectory can be corrected for low level wind effects. A multichannel data recording and processing system is to be used to collect wind and other meteorological data from a system of 6 towers. The data recording system requires 100 channels sampled to 1% once each second over periods of an hour or more. The input voltages are 3000-c carrier wave forms of 0- to 100-mv amplitude; the source impedence is about 2000 ohms. The wind components are observed in the form V squared sin and V squared cos theta , where V is the scaler wind velocity and is the wind-direction angle relative to the coordinate axes defined by the anemometer component motions. Both components must be divided by V; division prior to recording is discussed. Magnetic tape will be used to record the data in digital form (1) to make maximum use of the magnetic channel capacity, (2) to control the accuracy of input-to-output, and (3) to record and playback data at grossly different speeds.

Descriptors :   ANEMOMETERS, ANGLES, AXES, CAPACITY(QUANTITY), CHANNELS, COORDINATES, DATA PROCESSING, INPUT, LOW LEVEL, MAGNETIC FIELDS, MAGNETIC TAPE, METEOROLOGICAL DATA, MOTION, MULTICHANNEL, PLAYBACK, PROCESSING, RECORDING SYSTEMS, ROCKET LAUNCHERS, ROCKET TRAJECTORIES, SCALERS, VOLTAGE, WIND, WIND DIRECTION, WIND VELOCITY.

Distribution Statement : APPROVED FOR PUBLIC RELEASE