Detection system for locating aircraft
OwnerDavid G. Harrah, David J. Kollarinventors
Life of this patent
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Abstract
A portable detection system, including a receiver tuned to the frequency of signals transmitted by an aircraft transponder, will detect the presence of an aircraft in proximity to the system. The system has signal processing circuitry to transform the received signals to indicate the altitude of the detected aircraft. A display or alarm may alert the user to the presence of an aircraft. The system is useful to determine whether an aircraft may be engaged in a speed detection and ticketing operation or the closeness of other aircraft. The aircraft detection system may be used in conjunction with a radar detection system to provide a means by which various methods of traffic control can be detected.
Claims19
A portable detection system for detecting the proximity of an aircraft comprising:
- a portable housing including receiver means to passively detect RF energy transmitted by an aircraft transponder in the vicinity of the detection system which includes altitude information of the aircraft,
- signal processing means including a means for selective discrimination of the RF energy within an altitude range of 2500 feet to define an aircraft in a certain altitude band, and
- signaling means to indicate reception of said discriminated signals.
A portable detection system comprising
- a radar detection system including receiver means tuned to the frequency of radar signals to be detected,
- an aircraft detection system including receiver means tuned to the frequency of signals transmitted by an aircraft transponder,
- signal processing means which receive signals from said radar detection system and selectively discriminate signals from said aircraft detection system to define aircraft in a selected altitude band, and to generate warning and presence of radar signals or any aircraft in the selected altitude band in the vicinity of said detection system, and
- signaling means to receive said warning and display signals from said signal processing means to yield an indication of the operation of radar of the presence of aircraft in a selected altitude band in the vicinity of said detection systems.
Dependencies are inferred from the claim text.