Accession Number : ADA296417

Title :   Turbulence Measurements During Spring of 1994 at Apache Point Observatory.

Descriptive Note : Final rept. 21 May-25 Jun 94,

Corporate Author : ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM

Personal Author(s) : Eaton, Frank D. ; Hines, John R. ; Hatch, William H. ; Drexler, James J. ; Northrup, James

PDF Url : ADA296417

Report Date : APR 1995

Pagination or Media Count : 64

Abstract : Optical turbulence measurements taken using the Atmospheric Turbulence Measurement and Observation System (ATMOS) and an acoustic sounder at the newly established Apache Point Observatory (APO) are presented for spring 1994. APO is located at 9200 ft MSL about 18 mi south of Cloudcroft, NM. The ATMOS is an optical device for determining seeing conditions by measuring angle-of-arrival fluctuations through two subapertures of a telescope. This optical arrangement, utilizing a differential measurement technique, eliminates errors caused by tracking, vibration, and wind loading. Results include all r(o) measurements, the surface wind measured at nearby Sacramento Peak, time-height displays of sodar observations, and wind and Cn(2) profile measurements taken with a 50-MHz radar located in the Tularosa Basin. A method under development to predict optical turbulence at APO is briefly discussed. (AN)

Descriptors :   *REFRACTIVE INDEX, *TURBULENCE, *ATMOSPHERIC MOTION, VIBRATION, COHERENCE, ANGLE OF ARRIVAL, ACOUSTIC DETECTION, OPTICAL IMAGES, BACKSCATTERING, METEOROLOGICAL RADAR, DISPLAY SYSTEMS, PROFILES, SEASONAL VARIATIONS, OPTICAL ANALYSIS, REMOTE DETECTORS, WIND DIRECTION, DATA ACQUISITION, WIND VELOCITY, SOLAR RADIATION, HEIGHT, TELESCOPES, IMAGE MOTION COMPENSATION, ASTRONOMICAL OBSERVATORIES, SOUNDING, DIFFERENTIAL GEOMETRY.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE