초록 ▼

The operation of a positive finding collision avoidance system at an Own station that determines Own\s and Others\positions from SSR interrogations and replies thereto is initialized by briefly transmitting interrogations from Own station and receiving non-garbled replies thereto from Other stations

The operation of a positive finding collision avoidance system at an Own station that determines Own\s and Others\positions from SSR interrogations and replies thereto is initialized by briefly transmitting interrogations from Own station and receiving non-garbled replies thereto from Other stations to determine their direct ranges from Own. The range data is used in a trigonometric computation to obtain Own\s and such Others\initial positions. Interference with the normal operation of the standard ATCRBS is limited to a minimum by transmitting from Own very briefly and only when necessary. The distance between pairs of SSRs is also computed.

대표청구항 ▼

In a position-finding collision avoidance system at an Own station that passively derives differential azimuth (A), differential time of arrival (T), identity (ID) and altitude (H) data regarding transponder equipped Other stations utilizing standard ground ATCRBS interrogations and transponder repl

In a position-finding collision avoidance system at an Own station that passively derives differential azimuth (A), differential time of arrival (T), identity (ID) and altitude (H) data regarding transponder equipped Other stations utilizing standard ground ATCRBS interrogations and transponder replies thereto, and updates the positions of Own and Other stations for display at Own station, apparatus for initially establishing Own station\s position, comprising: a. means for transmitting a brief burst of interrogations in standard ATCRBS format utilizing a signature and repetition rate substantially different from that of any SSR, b. means for receiving replies to said interrogations from all Other stations within range, c. means for selecting from said replies by the Other stations only those replies that are not garbled, d. means for determining the direct range Y from said Own station to one or more of said Other stations whose non-garbled replies correlate with the time intervals between said interrogations and the replies thereto, and e. means for computing the Own station\s initial position from said one or more ranges Y, the known positions of the participating SSRs and the A, T, ID and H data derived from the standard ground ATCRBS interrogations from said SSRs and transponder replies thereto from said one or more Other stations.