Design of a Solar Ephemeris Synthesizer for LES-8/9

Abstract

The various design considerations of a solar ephemeris synthesizer for the LES-8/9 stationkeeping system are discussed. Different approximations are used to reduce the amount of hardware required for building the synthesizer. The overall accuracy of the synthesizer is about 0.01 deg for orbits inclined up to 5.0 deg from the ecliptic plane. For orbits inclined at greater angles up to 10 deg, the short term accuracy is 0.01 deg/day and the long term accuracy is about 0.05 deg/year. A few ephemerides generated by the synthesizer are graphically illustrated.

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Document Details

Document Type
Technical Report
Publication Date
Oct 12, 1972
Accession Number
AD0752250

Entities

People

  • Sushanta Srivastava

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Artificial Satellites
  • Cartesian Coordinates
  • Circular Orbits
  • Earth Orbits
  • Eccentric Orbits
  • Eccentricity
  • Ephemerides
  • Fuel Efficiency
  • Geosynchronous Satellites
  • Measurement
  • Orbits
  • Satellite Orbits
  • Solar Radiation
  • Stationkeeping
  • Time Intervals

Fields of Study

  • Physics

Readers

  • Software Engineering
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Orbital Debris