Accession Number : AD0651820
Title : MICROBAROGRAPHS FOR MEASUREMENTS OF ATMOSPHERIC WAVES.
Descriptive Note : Technical rept.,
Corporate Author : COLUMBIA UNIV DOBBS FERRY N Y HUDSON LABS
Personal Author(s) : Clay,C. S. ; Kraft,D. W.
Report Date : 16 FEB 1967
Pagination or Media Count : 21
Abstract : Microbarographs may be divided into two classes, the very sensitive absolute of 'dc' instruments and 'high-pass' instruments. Most meteorological measurements are made by means of absolute instruments. These instruments are used for very low-frequency atmospheric fluctuations, i.e. cycles/month, cycles/day and a few cycles/hour. High-pass instruments are generally used in the frequency range above a few cycles/hour. It has been necessary to choose the type of response to suit the desired measurements because the noise power spectrum density is much larger at low frequency than at high frequencies. The specifications and range of operation are summarized. (Author)
Descriptors : (*MICROBAROMETRIC WAVES, *RECORDING SYSTEMS), (*METEOROLOGICAL INSTRUMENTS, MICROBAROMETRIC WAVES), MEASUREMENT, PERIODIC VARIATIONS, GRAVITY
Subject Categories : Meteorology
Distribution Statement : APPROVED FOR PUBLIC RELEASE