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Beam waveguide antenna with independently steerable antenna beams and method of compensating for planetary aberration in antenna beam tracking of spacecraft

  • US 6,225,961 B1
  • Filed: 07/27/1999
  • Issued: 05/01/2001
  • Est. Priority Date: 07/27/1999
  • Status: Expired due to Term
First Claim
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1. A method of controlling a terrestrial antenna system to compensate for planetary aberration, comprising:

  • aligning a receive beam of the antenna system at a present time with a past position of a spacecraft; and

    aligning a transmit beam of the antenna system with a future position of the spacecraft spaced from the past position, wherein a down-link signal and an uplink signal can be simultaneously received from the past position of the spacecraft and transmitted to the future position of the spacecraft by the antenna system, respectively.

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