Accession Number : AD0683779

Title :   PREDICTION ACCURACIES OF 5 DEGREE X 5 DEGREE MEAN ANOMALIES FROM 1 DEGREE X 1 DEGREE MEANS AT DIFFERENT LATITUDES,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

Personal Author(s) : Obenson,Gabriel F. T.

Report Date : NOV 1968

Pagination or Media Count : 48

Abstract : Covariance functions for 5 ft x 5 ft and 1 degree x 1 degree blocks are derived from the covariance function for point anomalies at different latitudes. Using the 1 degree x 1 degree covariance function at certain latitudes and different 1 degree x 1 degree configurations, prediction accuracies for 5 degree x 5 degree blocks are studied for three different methods. It is shown that the accuracies are generally the same for any one method at different latitudes for any given 1 degree x 1 degree configuration. If the number of 1 degree x 1 degree blocks in any 5 degree x 5 degree block is more than about ten, the arithmetic mean method gives practically the same accuracy as the minimum variance method even if all known 1 degree x 1 degree blocks are used. (Author)

Descriptors :   (*GEODESICS, GRAVITY), ANALYSIS OF VARIANCE, LEAST SQUARES METHOD, STATISTICAL ANALYSIS, DENSITY, ANOMALIES, PREDICTIONS, TABLES(DATA)

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE