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Method and apparatus for tracking objects

  • US 4,298,874 A
  • Filed: 10/24/1978
  • Issued: 11/03/1981
  • Est. Priority Date: 01/17/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for determining a pointing angle to a first body from a second body comprising:

  • at least two independently oriented first body radiating means coupled to said first body and defining a first reference coordinate frame;

    a first means for applying to said first body radiating means first actuating signals for producing a first field radiated in response to said first signals oscillating along a first line of generation and characterizing a first body pointing angle of a first pointing vector with respect to said first reference frame, said first field having receivable components characterized in that at said second body one direction in said first field has unique characteristics with respect to all other directions in said first field;

    at least two independently oriented second body receiving means coupled to said second body and defining a second reference coordinate frame for detecting and measuring the receivable components of said first field; and

    a second body analyzing means coupled to said second body receiving means for converting said first field components into a second body pointing angle, from said second body to said first body, relative to said second reference coordinate frame.

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