Quotables
"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 5089822 | Interrogation signal processor for air traffic control communications The present invention is directed to a Mode S uplink or interrogation signal demodulation system which can quickly recognize the Mode S signal and also filter out of noise present in the Mode S uplink or interrogation signal, thereby reducing the bit erro... | 02/18/1992 |
| 5081457 | Apparatus for reducing synchronous fruit in TCAS surveillance systems A system wherein TCAS transmissions have two jitter components added to the jitter component utilized in the interscan interval to minimize TCAS interference with ground station operation. The jitter components minimize the establishment of false intruder... | 01/14/1992 |
| 5063386 | Device for the detection of the signals of transponders interrogated by a secondary radar in the presence of multiple-path phenomena The device improves the decoding of the replies in S mode deformed by multiple-path phenomena or by imbrication with replies in standard A or C mode. To do this, the device carries out the following in the reception video signal Log Σ of the secondary ra... | 11/05/1991 |
| 4945550 | ATCRBS/SIF/TCAS reply decoder A decoder for separating pulse code modulated messages of the type used in ATCRBS where the messages are identified by two framing pulses separated by 20.3 us. and contain information pulses between the framing pulses separated from the framing pulses and... | 07/31/1990 |
| 4899157 | Leading edge detector/reply quantizer An improved Leading Edge Detector/Pulse Quantizer (LED) for use in a pulse code communications system. A prior LED included three shift registers for storing in relative time order, according to the time of reception of video pulse signals by an associate... | 02/06/1990 |
| 4896158 | Beacon fruit filter A method and apparatus for prefiltering received target and fruit replies to filter out more obvious occurrences of fruit replies in an air traffic control system. A detector detects reply signals occurring during sweeps of a radar. After each sweep of th... | 01/23/1990 |
| 4796030 | Dual threshold amplitude detector An amplitude detector is disclosed passing only video input signals whose voltage amplitudes are within specified minimum and maximum limits, and is particularly useful in a secondary radar system for filtering out FRUIT, friendly replies to unintentional... | 01/03/1989 |
| 4761651 | Pulse discriminating system for reply signals in a transponder A pulse discriminating system for reply signals and the like in transponders which may independently and correctly discriminate respective pulse trains in the case where a plurality of reply signals are overlapping with respect to time in the transponders... | 08/02/1988 |
| 4642638 | Apparatus for generating enhanced/regenerative bracket decode signals An improved bracket decoder apparatus including an enhanced bracket decoder ortion and a regenerative bracket decoder portion operates to generate enhanced bracket decode signals and regenerative bracket decode signals. The foregoing combination of decoder... | 02/10/1987 |
| 4314247 | Degarbler for an interrogator-transponder system A degarbler for an interrogator-transponder system with a reply code consisting of two framing pulses which enclose code pulses representative of a reply. The degarbler comprises in combination: a shift memory storing the replay code; framing-pulse detect... | 02/02/1982 |
| 4180815 | Radio identification systems To enable a transponder in a radio identification system, such as a secondary surveillance radar system, to remain responsive to a new interrogating signal received while it is processing a previously received interrogating signal, the transponder is prov... | 12/25/1979 |
| 4174519 | Method for the improved utilization of response signals in a _secondary radar system and a secondary radar system for implementing the method The time interval between the pulses of an interrogation signals transmitted to aircraft in the vicinity of an airport is varied at will in accordance with air traffic conditions. The time interval under heavy traffic conditions may be varied from its nom... | 11/13/1979 |
| 4167006 | Collision avoidance system of aircraft A collision avoidance system for aircraft using an on-board beacon interrogator. If altitude information is not included in a response signal from a transponder of an other aircraft or the response signal is garbled because a plurality of other aircraft a... | 09/04/1979 |
| 4167007 | Method and apparatus for identifying radar targets A method for identifying radar targets, especially ships at sea involves transmitting a first interrogation pulse, thereby causing a responder to generate a first identification signal containing a first set of data concerning the identity of the target, ... | 09/04/1979 |
| 4137531 | Radar selective interrogation system An aircraft ground movement monitoring system is provided similar to that described in co-pending U.S. patent application Ser. No. 608,214, now U.S. Pat. No. 4,109,248, that makes use of an aircraft's existing SSR transponder in a hyperbolic selective int... | 01/30/1979 |
| 4109248 | Radar systems A secondary radar system for establishing the position and identity of aircraft etc. on airfields, particularly for controlling their ground movements during bad visibility, comprises a pair of spaced aerials each arranged to successively transmit a parti... | 08/22/1978 |
| 4070673 | Radar video digital processor A video processor for a track-while-scan radar system, wherein each radar return, within a tracking window, is given a range weight corresponding to the range bin within the range sweep and an angle weight corresponding to a sweep count, which is initiate... | 01/24/1978 |
| 4052721 | Multi-target tracker for tracking near co-range targets A digital tracker in a cooperative collision avoidance system capable of generating track gates and determining critical values of tau (time to collision) for at least 16 targets and to determine the presence of two targets of substantially similar ranges... | 10/04/1977 |
