초록 ▼

A threat warning collision avoidance system at an Own station that produces pseudo range data, identity and, when available, differential altitude data from standard ATCRBS interrogations and Other station\s replies, rejecting the identity and data from Other stations that are outside a proximity sp

A threat warning collision avoidance system at an Own station that produces pseudo range data, identity and, when available, differential altitude data from standard ATCRBS interrogations and Other station\s replies, rejecting the identity and data from Other stations that are outside a proximity space surrounding Own station, and producing a threat alert signal and displaying the identity and associated data of any Other station entering said proximity space.

대표청구항 ▼

A collision avoidance system at an Own station, including: (a) means for receiving interrogation messages transmitted by each SSR within operational range of said Own station when said Own station is within the main beam of an SSR and also when said Own station is within a side lobe of said main bea

A collision avoidance system at an Own station, including: (a) means for receiving interrogation messages transmitted by each SSR within operational range of said Own station when said Own station is within the main beam of an SSR and also when said Own station is within a side lobe of said main beam, (b) means for receiving reply messages transmitted by any transponder-equipped Other station in response to such interrogation messages during a predetermined period following reception of each interrogation message at said Own station, (c) means for identifying each said Other station according to its reply messages, (d) means for determining, from the time relationships between each said received interrogation message and each said received reply message elicited thereby, differential time of arrival data for each of said identified Other stations with respect to each said SSR, (e) means for storing as entries in a running account each successive identity obtained by means (c) and the corresponding time of arrival data obtained by means (d) for a predetermined number of interrogation repetition periods, (f) means for matching from the entries in means (e) those identities and corresponding data that are substantially duplicated a predetermined number of times, (g) means for storing the entry for each such matched identity and corresponding data for a storage period at least as long as the longest SSR beam rotation period, (h) means for selecting the largest differential time of arrival related to each said identified Other station stored in means (g), and (i) means for producing a threat alert in response to any such selected differential time of arrival below a predetermined value.