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7633429 |
Monopulse radar signal processing for rotorcraft brownout aid application
A method, system and computer program is disclosed for reducing range and angular ambiguities in a target data matrix output from a real beam monopulse radar sensor within a single beam for use in...
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7605748 |
Filling level radar frequency converter
A frequency converter for a filling level radar includes a signal generator unit, a receiver circuit, a transmit coupler, and an amplifier. The amplifier is amplifying the transmit signal at the...
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7592945 |
Method of estimating target elevation utilizing radar data fusion
A collision avoidance system for reducing false alerts by estimating the elevation of a target, includes short and long range single-dimensional scanning radar sensors having differing ranges and...
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7495580 |
Arrangement for locating a parked vehicle
The invention relates to an apparatus for finding a parked vehicle again. According to the invention, a portable unit is provided with a pressure sensor whose signals can be evaluated by an...
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7486228 |
Methods and systems for piecewise curve fitting or radar altimeter range gate data
A method for compensating for range gate slide with respect to received returns within a radar altimeter is described. The method includes adjusting the amount of overlap between a range gate pulse...
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7417583 |
Methods and apparatus for providing target altitude estimation in a two dimensional radar system
Method and apparatus to track a contact using a sensor in a two-dimensional radar system, determine a closest point of approach (CPA) for the contact, determine a time to closest point of approach...
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7414566 |
System for monitoring airport area
A system is for recognizing obstructions and monitoring movements on or above an airport area ( 1 ) with sensors ( 2, 3, 4 ). A sensor ( 2 ) is a radar device having a plurality of antenna elements...
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7379016 |
Carrier phase detection system for radar sensors
A pulse detection system for expanded time radar, laser and TDR sensors detects specific cycles within bursts of cycles. A sensor transmits and receives short bursts of RF cycles. A transmit pulse...
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7330147 |
System and method for ground proximity warning with enhanced obstacle depiction
Systems and methods for displaying ground obstructions on a visual display are disclosed. In an embodiment, a ground proximity warning system includes at least one aircraft sensor system operable...
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7307577 |
Storm top detection
A method of characterizing a maximum height of a storm cell for an aircraft is provided. First reflectivity data formed from a first scan of a storm cell by a radar is received and a first centroid...
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7295150 |
Methods and systems for identifying high-quality phase angle measurements in an interferometric radar system
A method for determining a mechanical angle to a radar target utilizing a multiple antenna radar altimeter is described. The method comprises receiving radar return signals at the multiple...
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7265710 |
Multipath height finding method
A method for determining the height H T of a target above a surface, the method comprising the steps of determining a distance R from a source to a target, determining a distance L representative...
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7239265 |
Method for evaluating and controlling a radar installation
A method is disclosed for evaluating the terrain surrounding a radar site. The method comprises to calculate the radar horizon around a radar site from stored terrain elevation information. The...
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7218268 |
Self-calibrating interferometric synthetic aperture radar altimeter
A synthetic aperture radar system uses RF bandwidth and Doppler beam sharpening principles to develop fine altitude and along-track resolutions. To achieve accurate cross-track position...
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7167126 |
Radar system and method for determining the height of an object
System and method for determining the height of an object reflecting a real beam radar signal by receiving the reflected signal with a first and second vertically spaced antennas. Receivers provide...
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7130449 |
Method and system for ground imaging
A system and method for determining the slope of a ground imaged area. The system includes a camera, a memory, and a processor. The camera generates a first and a second image of an area of ground...
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7064703 |
Methods and apparatus for randomly modulating radar altimeters
A method for randomly phase modulating a radar altimeter is described. The method includes momentarily applying a signal from a random noise source to an amplifier, applying an output of the...
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7038615 |
Efficient technique for estimating elevation angle when using a broad beam for search in a radar
A method and apparatus for estimating elevation angle when using a broad search beam such as a cosecant-squared beam is provided. The range of a target detected during a search with a broad beam...
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6980153 |
Radar altimeter for helicopter load carrying operations
A radar altimeter for vehicles that operate with a load suspended underneath is described. The radar altimeter includes a transmitter configured to transmit radar signals toward the ground, a...
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6933879 |
Method and system for localizing a target in an interrogation-response system
In a method and system to determine the position of a target by means of an IFF type antenna, the antenna having a given direction of aim, the method comprises a step for combining the distance D...
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6911932 |
Two antenna, two pass interferometric synthetic aperture radar
A multi-antenna, multi-pass IFSAR mode utilizing data driven alignment of multiple independent passes can combine the scaling accuracy of a two-antenna, one-pass IFSAR mode with the height-noise...
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6819285 |
Monopulse radar system for determining the height of a target
An improved method of estimating target elevation angle for dual squinted beam radar systems is disclosed. The target's elevation angle is estimated by receiving complex I/Q data from two receive...
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6795014 |
Method and apparatus for detecting vehicle distance
Stableness in detecting the distance to a preceding vehicle by calculating the distance to the preceding vehicle using reflected waves of a radar beam scanned at a scanning angle that is adjusted...
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6791488 |
Method and apparatus for measuring ground height
A method and apparatus for determining the distance between an agricultural machine and a surface such as the ground, wherein at least one sensor contactlessly determines the distance between the...
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6593875 |
Site-specific doppler navigation system for back-up and verification of GPS
A system and method for identifying the position of an airborne platform on a flight path includes at least three radar transceivers that are directed along respective beam paths to generate return...
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6486826 |
Arrangement for the precise distance measuring, in particular the filling level measuring
An arrangement for the precise measuring of the distance with a FMCW radar device having a frequency-variable digitally-actuated oscillator to generate a transmitting frequency which can be tuned...
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6429804 |
Motor-vehicle-mounted radar apparatus
A target 22 is explored by transmitting an exploration signal 40 at a certain angle while scanning an antenna 23. In the go and return exploration the angle for transmitting the exploration...
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6414627 |
Homodyne swept-range radar
A single-antenna short-range radar transceiver emits 24 GHz RF sinewave packets and samples echoes with strobed timing such that the illusion of wave propagation at the speed of sound is observed,...
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6414745 |
Method and apparatus for determining the relative height of two targets
An apparatus for determining the relative height between two targets is disclosed. The present invention also discloses a method for determining the relative height between two targets; the method...
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6229473 |
Arrangements for the one-dimensional or multi-dimensional determination of the position of a load suspension point in hoists
The stopping of a load suspended from a crane requires a swing control or, respectively, a swing damping. Upon employment of microwave measuring units, spacings between a carrying cable suspension...
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6157891 |
Positioning and ground proximity warning method and system thereof for vehicle
A positioning and ground proximity warning method for vehicle includes the steps of outputting global positioning system signals to an integrated positioning/ground proximity warning system...
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6137438 |
Precision short-range pulse-echo systems with automatic pulse detectors
An equivalent time pulse-echo radar or other pulse-echo system employs a transmit reference sampler collocated with the transmitter to provide a transmit reference pulse, which initiates a pulse...
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6130637 |
Measuring the thickness of hot slag in steelmaking
Radar is used to measure not only the level of slag on molten steel but also its thickness; the measurement is used to calculate the volume of slag, and, in turn the amount of additives for slag...
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5923283 |
Altimetric type measurement method for use on a satellite
An altimetric type measurement method for use on a satellite transmits a pulse towards the surface of the sea and carries out frequency transformation on the return signal resulting from the...
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5867119 |
Precision height measuring device
An apparatus for measuring the height and cross-track offset of a surface location from a moving platform is defined. First and second antennas positioned on an underside of the platform are...
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5831563 |
Improved height above target (hat) measurement algorithm
A method for measuring the height of an aircraft above a target. An aircraft or platform is provided with a synthetic array radar (SAR) system that is used to designate a target. The aircraft...
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5734346 |
Method of an apparatus for detecting the displacement of a target
A method of detecting the displacement of a target in a given environment includes storing reference data having data representative of the environment; transmitting a transmit signal towards the...
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5703594 |
Method for remotely detecting tides and the height of other surfaces
Transmitted signals are used to accurately and remotely determine the veral distance of an earth-based receiving antenna above a surface, and hence can be used to determine the tide condition of a...
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5652592 |
Radio location with enhanced Z-axis determination
An enhanced system for calculating the Z-Axis, or relative height or altitude, of a radio beacon. The present invention uses a barometric pressure sensing device co-located with the radio emitter...
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5557282 |
Height finding antenna apparatus and method of operation
A ground based radar antenna system and method for determining the elevation angle φ of a tracked target having a shaped reflector and a pair of spaced feedhorns for transmitting radiated energy...
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5448241 |
Terrain height radar
A terrain height radar system and processing method comprising a high resolution synthetic aperture radar (SAR) mounted on an air vehicle and a SAR signal processor containing a signal processing...
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5442360 |
Echo distance-measuring system with calibration apparatus
The calibration apparatus (16) includes a recirculating optical delay loop (22) constituted by two delaying fibers (F2, F3), an optical amplifier (28), and a coupler (26) for providing a succession...
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5434574 |
System for detecting an altitude of a vehicle dependent on a global positioning system
It is determined that an altitude of a vehicle can not be calculated from data applied from satellites. When the calculation can not be performed, a provisional altitude is obtained with a...
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5278564 |
Method and apparatus for the determination of the height of a target
Radar apparatus for determining the height of a low-elevation target, the target being illuminated by a transmitter (7) and an antenna (3) via a TR-switch (6). Electromagnetic radiation reflected...
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4953972 |
Range dispersion sensor
A range dispersion sensor operative to detect objects of a preselected height "h" operates on quarterwave interference principles. Electromagnetic energy is modulated at a first frequency f 1 such...
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4649389 |
Stacked beam radar and target height measurement extractor especially for use therein
A radar having a multiplicity of receive beams stacked in elevation and a target height extractor especially for use therein are disclosed. In operation, a set of range sweeps corresponding to an...
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4595925 |
Altitude determining radar using multipath discrimination
A height-determining radar utilizing both direct and multipath signals coising a radar transmitter and receiver and means for measuring the variation of the pulse widths of the received radar...
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4588992 |
Radar tracking system and display
Apparatus is provided in conjunction with a small radar unit, for providing an improved display and additional radar target information. A ball type compass has an optical switching circuit for...
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4538150 |
Self-calibration of stacked beam radar
An apparatus and method for calibrating the output signal of a receiver having amplification over a predetermined input signal amplitude range has been described incorporating means for generating...
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4342997 |
Array modification that adds height capability to a 2D array radar
A two-dimensional (2D) radar antenna system includes a combination of power divider networks coupled together to drive an array of antenna elements to form two beams in different directions...
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