국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	A FORTRAN PROGRAM FOR THE ANALYSIS OF GROUND-BASED RADAR DATA, DERIVATIONS AND USAGE, VERSION 6.2
저자	Edward A. Haering Jr. and Stephen A. Whitmore
Keyword
URL	http://www.dfrc.nasa.gov/DTRS/1995/PDF/H-1892.pdf
보고서번호	NASA-TP-3430
발행년도	1995
출처	NASA Dryden Flight Research Center
ABSTRACT	A postflight FORTRAN program called "radar" reads and analyzes ground-based radar data. The output includes position, velocity, and acceleration parameters. Airdata parameters are also provided if atmospheric characteristics are input. This program can read data from any radar in three formats. Geocentric Cartesian position can also be used as input, which may be from an inertial navigation or Global Positioning System. Options include spike removal, data filtering, and atmospheric refraction corrections. Atmospheric refraction can be corrected using the quick White Sands method or the gradient refraction method, which allows accurate analysis of very low elevation angle and long-range data. Refraction properties are extrapolated from surface conditions, or a measured profile may be input. Velocity is determined by differentiating position. Accelerations are determined by differentiating velocity. This paper describes the algorithms used, give the operational details, and discusses the limitations and errors of the program. Appendixes A through E contain the derivations for these algorithms. e derivations include an improvement in speed to the exact solution for geodetic altitude, and improved algorithm over earlier versions for determining scale height, a truncation algorithm for speeding up the gradient refraction method, and a refinement of the coefficients used in the White Sands method for Edwards AFB, California. Appendix G contains the nomenclature.