Accession Number : AD0412501


Title :   PARAMETRIC FORMULAS FOR GEODESIC CURVES AND DISTANCES ON A SLIGHTLY OBLATE EARTH


Descriptive Note : Research note


Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA


Personal Author(s) : Lewis, E. A.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=AD0412501


Report Date : APR 1963


Pagination or Media Count : 44


Abstract : Approximate expressions for geodesic curves and the geodesic arc-lengths are obtained by straight forward methods which permit upper bounds of error to be established analytically. The errors are typically less than 1.4 parts per million, and even higher accuracy is possible with additional corrections. Selected numerical examples are given, and calculated arc-lengths are compared with values obtained with Andoyer's approximate formula.


Descriptors :   *RADIO DIRECTION FINDERS , *DISTANCE MEASURING EQUIPMENT , *GEODESICS , PROPAGATION , INTEGRALS , ACCURACY , SPHERES , ELECTROMAGNETIC RADIATION , DIFFERENTIAL EQUATIONS , GEOMETRY , CALCULUS OF VARIATIONS , VERY LOW FREQUENCY.


Subject Categories : CARTOGRAPHY AND AERIAL PHOTOGRAPHY


Distribution Statement : APPROVED FOR PUBLIC RELEASE