×

Position finding and collision avoidance system

  • US 4,733,241 A
  • Filed: 06/24/1987
  • Issued: 03/22/1988
  • Est. Priority Date: 12/20/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus at an Own station within the service area of an SSR for determining the position of a transponder-equipped Other station within said service area, including at the Own station:

  • a. means for receiving the interrogations transmitted by said SSR,b. means for geographically locating said SSR,c. means for receiving replies transmitted from said Other station in response to said interrogations,d. means for determining, from the time relationships between said received interrogations and said replies, data defining the position of said Other station with respect to the Own station in coordinates of differential azimuth (A),e. means for determining, from the time relationships between said received interrogations and said replies, data defining the position of said Other station with respect to the Own station in coordinates of differential time of arrival (T),f. means for determining the position of the Own station, andg. means for computing, from said data and the known positions of said SSR and said Own station, the position of said Other station.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×