Accession Number : ADA310601

Title :   A Method of Deleting the Outliers in Optical Observations of Artificial Satellites,

Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Lianda, Wu ; Peizhang, Jia

PDF Url : ADA310601

Report Date : 10 JUN 1996

Pagination or Media Count : 13

Abstract : This article discusses in detail deletion problems associated with outliers in optical observations of artificial satellites. We first of all take complex nonlinear problems, making use of initial orbits and turn them into linear models convenient for digital processing. Use is made of two quantities - equations of time Delta T as well as orbital plane normal deviation Delta S in order to analyze and make determinations. In conjunction with this, a type of L-estimation target function opting for the use of trimmed least squares is put forward to carry out methods associated with deletion of outliers. The breakdown point associated with these methods is 50%. At the same time, computational examples are given. In conjunction with this, discussions are carried out with regard to initial orbit accuracies and deletion criteria.

Descriptors :   *EXPERIMENTAL DATA, *ARTIFICIAL SATELLITES, *STATISTICAL ANALYSIS, MATHEMATICAL MODELS, SIGNAL PROCESSING, DIGITAL SYSTEMS, OPTICAL DETECTION, EARTH ORBITS, OBSERVATION, ACCURACY, NONLINEAR SYSTEMS, LEAST SQUARES METHOD, TRANSLATIONS, CHINA, CHINESE LANGUAGE.

Subject Categories : Optical Detection and Detectors
      Statistics and Probability
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE