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Apogee at constant time-of-day equatorial (ACE) orbit

  • US 5,326,054 A
  • Filed: 01/21/1988
  • Issued: 07/05/1994
  • Est. Priority Date: 10/06/1986
  • Status: Expired due to Term
First Claim
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1. A man-made satellite that is made to travel in an elliptical orbit about the earth, wherein:

  • the satellite revolves about the earth a discrete number of times per day;

    each of the apogees corresponding to the daily revolutions is positioned over the same earth longitude at substantially the same local time-of-day for each day of the year; and

    the apsidal rotation rate in inertial space of the orbit is substantially equal to the mean rate at which the earth revolves about the sun.

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