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7636620 |
Signal distribution device operating in aircraft instrumental landing systems
A distribution device for a glide guidance component, the distribution device including an array of antenna elements installed on a pylon. The distribution device includes: a first and a second...
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7409272 |
Systems and methods for removing undesired signals in instrument landing systems
A method of removing undesired signals in an aviation guidance system may include receiving at least one first desired signal having a first frequency of amplitude modulation, receiving at least...
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7363043 |
Passive GSM-based self-locating device
A self locating device that uses GSM signals associated with GSM digital telephone base stations to determine its current location. The device uses GSM common channel signals to determine observed...
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6570531 |
Satellite navigation receiver designed for compatibility with aircraft automatic landing systems
A satellite navigational receiver landing system having retrofit compatibility with integrated landing system (ILS) receivers, in accordance with the invention, includes radio frequency circuitry...
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6348891 |
Far field monitor apparatus
In a far field monitor apparatus, each of first and second ILS localizers includes a receiving antenna, a plurality of couplers, a combiner, a receiver, and a first detector. The receiving antenna...
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6239745 |
Satellite landing system having instrument landing system look alike guidance
Disclosed are a global navigation satellite system (GNSS) landing system (GLS) and methods of using the same to calculate a vertical deviation from the glide slope of the aircraft. A GNSS antenna...
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5689273 |
Aircraft surface navigation system
A surface guidance system for guiding aircraft equipped with Instrument Landing Systems along taxiways which utilizes two inductive loops (14,16) installed around the right half and the left half...
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5610600 |
Operation verification system and method for navigational instruments
An instrument verification system which causes the instrument needles to "bob" periodically--a sharp momentary deflection from center. If desired, the flags can also be "dipped" at the same time,...
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5483245 |
ILS signal analysis device and method
The invention relates to an instrument landing system (ILS) signal analysis device including an analog/digital converter receiving the composite signal to be analyzed and delivering a succession of...
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5323332 |
Instrument landing system calibrator
The Instrument Landing System Calibrator employs a combined analog radio frequency downconverter with a digital control system for analysis of difference in depth of modulation of tones generated...
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5177491 |
Navigation receiver with beam asymmetry immunity
Airborne navigation receivers are designed to derive navigation information with accuracy immune to beam asymmetry errors. Scanned navigation beams of the Microwave Landing System are subject to...
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4990921 |
Multi-mode microwave landing system
A guidance system for landing an aircraft is described which uses a source of signals identifiable with the aircraft and a ground station which is linked to the aircraft. Specifically, the ground...
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4811022 |
Scanning antenna having phase center diversity
The object of this invention is to reduce the adverse effects of reflected electromagnetic radiation on the measurement threshold of a scanning beam. It has particular application to the time...
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4623892 |
Dynamic limiter for MLS receiver
Received scanning signals radiated by a MLS ground system are used to determine and evaluate the approach angle of the aircraft. The difference between the angle for a particular scanning signal...
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4609921 |
Digital modulation depth detector
An improved system for digital analysis of a composite modulated signal to determine difference in depth of modulation is disclosed. The system is useful, for example, in developing deviation...
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4499586 |
Microprocessor controlled AGC
A receiver for receiving recurring first and second scanning signals. The peak of successive first and second scanning signals is digitally detected and averaged. The gain of an amplifier of the...
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4399425 |
Circuit for operating a flight navigation indicator
A circuit for use in aircraft navigation equipment includes operational amplifiers to drive a cockpit indicator such as an electric meter linearly over a first predetermined range, constantly over...
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4330827 |
Aircraft autopilot system
In an aircraft autopilot there is provided a first circuit selectively actuatable to connect the glide slope adapter to electrical power during the existence of a glide deflection signal, the glide...
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4215346 |
Navigation unit having time shared operation
A navigational unit having a time-shared mode of operation for handling a plurality of different navigational signals is provided wherein IF components within the unit may have a dual dedication,...
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4184157 |
Identification tone reconstitution in a time shared navigational receiver
In an information receiving apparatus having a time-shared mode of operation for simultaneously receiving a plurality of information carrying signals, at least one signal of which includes an...
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4184158 |
Time shared operation of navigational unit
A general aviation navigational receiver is provided with a digital channel selection wherein a channel selection knob on the aircraft control board may be operated to control the functioning of a...
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4164340 |
Method and apparatus for determining when a glide slope signal exceeds a predetermined level
The invention relates to a system utilizing an exponential control law for glide slope capture. The capture maneuver from above or below the beam, is a function of decreasing glide slope beam...
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4115777 |
Aircraft landing systems
A dual I.L.S. glide slope system for allowing a normal 3° descent path plus an additional 6° descent path which can be used for noise abatement procedures etc. In accordance with the present...
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4101893 |
Aircraft landing aid for zero-zero visibility landings
An aircraft landing system which provides a pilot a perspective view of a nway on which he intends to land under zero visibility conditions. The system includes a multiplicity of microwave...
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3976267 |
Vertical glide slope control system including complementary filter
A vertical glide slope control system including a complementary filter. Complementary aircraft generated and processed signals are added to a glide slope error signal which may include distortions....
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3967278 |
Low cost microwave receiver for ILS
In an instrument landing system (ILS), an aircraft is provided with apparatus for receiving from a ground-based transmitter overlapped modulated beam signals, which, when processed by the receiver,...
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3952309 |
Doppler perspective navigation system employing the comparisons with a reference source of signal phases received on an aircraft by a plurality of sensors
A perspective display of a runway is obtained on an aircraft by transmitting signals from selected marker positions about the runway. A plurality of sensors are positioned on the aircraft with each...
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3947809 |
Below glide slope advisory warning system for aircraft
For use in an aircraft warning system which measures the descent below a radio glideslope and compares it with the aircraft's altitude above ground to generate a warning when the descent below...
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3946358 |
Aircraft ground proximity warning instrument
An aircraft instrument for warning the pilot that the aircraft is in an unsafe condition in proximity to the ground. The instrument has inputs representing aircraft configuration, flight condition...
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3944171 |
Glide slope control signal processing system
A rate-limited, signal magnitude limited, non-linearized lag circuit for processing glide slope error signals to reject noise and reduce aircraft response to hardover signals due to ground...
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3911436 |
Device for aircraft trajectory guidance
When approaching an airport at which there is a localizer and glide path transmitter, a localizer and glide path receiver supplies azimuth angle signals and elevation angle signals, and a distance...
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3892373 |
Integrated glide path/flare automatic flight control system
A system for controlling an aircraft during integrated glide path capture and tracking and flare maneuvers when automatically landing the craft. The system eliminates the need for explicit...
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3887148 |
Aircraft glide slope coupler and landing system
A glide slope coupler, adapted for use in an integrated automatic pilot and flight director system provides apparatus for guiding an aircraft with respect to a radio defined glide slope to a flare...
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3847328 |
AUTOMATIC GO-AROUND CONTROL SYSTEM FOR AIRCRAFT
The invention relates to a system utilizing a control law which generates appropriate pitch rotation and airplane climbrate commands from any initial airplane rate of descent during the approach....
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3824594 |
APPARATUS FOR RECEIVING SEPARATE STANDARD FREQUENCIES WITH SEPARATE SUB-BANDS
Radio guidance signals are received in any one of a plurality of frequency sub-bands with a separate standard frequency signal being provided for each separate frequency sub-band, and each standard...
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3819914 |
DEVICE FOR THE FLIGHT GUIDANCE FROM A WIRELESS GUIDE BEAM
The on-board landing approach apparatus of an aircraft includes a computer between the landing receiver and the autopilot and/or the crosspointer instrument employed to direct the landing approach...
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3810181 |
LOW COST GUIDANCE RECEIVER
A low cost airborne set for a microwave landing system in which a voltage controlled oscillator only accurate to within two channels is used for tuning. The oscillator, after selection of a desired...
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3806934 |
INERTIAL LEAD VERTICAL SPEED INDICATOR/GLIDE SLOPE DIRECTOR
The broad principle upon which the invention is based is to employ a vertical speed indicator having an element movable in accordance with vertical speed of the carrying aircraft, and a director...
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3801049 |
AUTOMATIC APPROACH LANDING AND GO-AROUND PITCH AXIS CONTROL SYSTEM FOR AIRCRAFT
The invention relates to a system utilizing an exponential control law for glide slope capture and flare. The capture maneuver from above or below the beam, is a function of decreasing glide slope...
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3781891 |
AIRCRAFT GLIDE SLOPE INSTRUMENTATION SYSTEM
An aircraft glide slope instrumentation system for use with an altimeter means equipped aircraft and a landing strip, the instrumentation system comprising a pair of ground-based transmitter...
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3776455 |
TERMINAL GUIDANCE SYSTEM
A terminal guidance system including a heading command subsystem and a glide-slope command subsystem which develop command signals for use in guiding an aircraft or other vehicle into a preselected...
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3757338 |
GLIDE SLOPE LOCK-OUT NETWORK
An improved glide slope receiver circuit prevents false acquisition of glide slope and insures that only a good and existing glide slope signal will arm the glide slope circuitry. A normally...
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3754262 |
MICROWAVE AIRCRAFT GUIDANCE SYSTEM
A microwave ILS system which is compatible with a conventional ILS system, including a microwave receiver having a converter operable by subtraction of a predetermined frequency to convert a pair...
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3750177 |
INSTRUMENT LANDING SYSTEM RECEIVER MONITOR
A phase-amplitude detection system employing a tonal tracer signal imposed on the received ILS carrier signal provides warning as concerns receiver malfunction ahead of the output tone filter...
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3716864 |
ILS RECEIVER FOR AIRCRAFT WITH DISTORTION WARNING OR ELIMINATION
Means for improving the reliability of instrument landing system receivers is disclosed. Filtering techniques detect predetermined harmonics of the basic tone-pair employed in such systems, which...
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3713160 |
TRANSMITTER MONITORS FOR ILS BEACONS
In a localizer beacon of the ILS system, analog signals derived from the two lateral antennas by means of probes coupled thereto are phase-shifted by equal angles, disregarding multiples of 2 π....
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3697022 |
METHOD AND APPARATUS FOR AIRCRAFT GUIDANCE
A method of guiding aircraft to effect an automatic approach to a landing place in which radar waves are transmitted to be received by the flight controls of the aircraft. The radar waves are...
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3680111 |
RADIOMETRIC AIRCRAFT LANDING SYSTEM
An aircraft landing system employing passive radiometer apparatus mounted in an aircraft to scan a specially arranged ground target, which will provide directional and altitude guidance in the...
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3680120 |
AIRCRAFT LANDING RADIO GUIDANCE RECEIVER WHICH WARNS OF SIGNAL REFLECTIONS
Receiver apparatus for use in an aircraft landing radio guidance system, including means for deriving beat frequencies from combinations of the upper-sideband components of a received guidance...
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3648230 |
AIRCRAFT HEADING AND COURSE DISPLAY
A heading card with an azimuth scale on the face thereof is mounted on a cage rotatable about the axis of the card. The cage is responsive to the output of a directional gyro for controlling the...
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