Accession Number : AD0783027

Title :   Integration Modifications to Accommodate Solar Radiation Discontinuities.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL WEAPONS LAB DAHLGREN VA

Personal Author(s) : Beuglass,Larry K.

Report Date : JUN 1974

Pagination or Media Count : 22

Abstract : Discontinuities which appear in problems involving numerical integration may require special attention if a multistep algorithm is used. The report describes the changes which were made to the ASTRO computer program in order to accommodate the discontinuities in the solar radiation pressure affecting a satellite as it enters and leaves the Earth's shadow. Of particular interest is the improvement in the accuracy of an ephemeris by a factor of 40 at negligible cost in terms of additional computer time. (Author)

Descriptors :   *Solar radiation, *Radiation pressure, Ephemerides, Curve fitting, Graphics, Computer programming, Numerical integration

Subject Categories : Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE