Celest Computer Program for Computing Satellite Orbits

Abstract

The Celest Computer Program uses raw Doppler data to determine satellite orbits. It provides diagnostic information on the quality of the orbits and the data used in producing those orbits. The basic technique employed is one of weighted least squares where the data is edited and weighted within the program. An iterative capability exists for nonlinear problems. Trajectories are formed by directly integrating the equations of motion in an inertial frame. The force equation has components due to earth, sun and moon gravity, solar radiation, thrust, atmospheric drag, solar and lunar tidal distortion. A satellite frequency offset error can be determined, and the program has the facility for determining unknown receiver locations. The computer program occupies 130 octal units of memory, is structured as nine major overlays, and is completely written in FORTRAN. The program is primarily operated on a sixty hit CDC 6700 computer.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1976
Accession Number
ADA030478

Entities

People

  • James W. O'toole

Organizations

  • Naval Surface Warfare Center Dahlgren Division

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Computational Science
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Equations Of Motion
  • Inertial Navigation Systems
  • Mass Storage
  • Navigation
  • Navigation Satellites
  • Observatories
  • Orbital Elements
  • Physics Laboratories
  • Plastic Explosives
  • Radiation Pressure
  • Reference Ellipsoids
  • Satellite Orbits
  • Statistics

Readers

  • Approximation Theory.
  • Computer Science.
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Orbital Debris