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| Number | Title | Issue Date |
| 5140336 | Non-resonant antenna for wind profilers An antenna system particularly suited for wind profiling produces a radio beam which can be oriented in each of four directions and optionally in a fifth, vertical direction and four intermediate directions. The antenna has a single array of strings of co... | 08/18/1992 |
| 5135397 | 3-D weather for digital radar landmass simulation Weather simulation is a modular addition to a digital radar landmass simulator (DRLMS). The DRLMS is a four channel system, i.e., culture, elevation, aspect and weather. All four channels are integrated to provide a simulated radar landmass simulation wit... | 08/04/1992 |
| 5055849 | Method and device for measuring velocity of target by utilizing doppler shift of electromagnetic radiation A method for measuring the velocity (v) of a moving target (A). Radio signals are transmitted by means of radio transmitter-receiver arrangements of both the measuring station (B) and the target station (A) and received at the opposite stations (A,B), the... | 10/08/1991 |
| 4952941 | Weather radar temperature controlled IMPATT diodes circuit and method of operation A method in circuit for controlling the temperature of IMPATT diodes during pulsed operations: first, by providing a switch of the RF energy produced by the IMPATT for switching the IMPATT output from an antenna to an internal load, the switch being a pin... | 08/28/1990 |
| 4811020 | Radar protected against rain clutter and method for protecting a radar against rain clutter The radar is designed to identify and then eliminate rain clutter signals. For this, the radar works in circular polarization with alternately identical and opposite polarization directions at transmission and reception, from one recurrence to the next on... | 03/07/1989 |
| 4710772 | Log magnitude pulse interference detection for a radar system A radar receiver having a feed-forward control circuit for adjusting the automatic gain control (AGC) setting in 6 dB increments for each range cell in a next sweep based on the AGC setting of each corresponding range cell in the present sweep, the magnit... | 12/01/1987 |
| 4680588 | Radar system with incremental automatic gain control A radar receiver having a feed-forward control circuit for adjusting the automatic gain control (AGC) setting in 6 dB increments for each range cell in a next sweep based on the AGC setting of each corresponding range cell in the present sweep, the magnit... | 07/14/1987 |
| 4667199 | Simulator A simulator for simulating radar or sonar signals returned to an observation point from a three-dimensional object of non-uniform reflectivity. An imaginary three-dimensional object is defined spatially in the form of a series of three-dimensional regular... | 05/19/1987 |
| 4613938 | Present weather observing system utilizing particulate size and velocity measurements A present weather observing system including a radiation source for providing a beam of radiation in the atmosphere and a detector for detecting scattered radiation from suspended or precipitating particles within a sample volume, the detector having a fi... | 09/23/1986 |
| 4555703 | Environmental mapping system A circuit which detects environmental sources of echos received by a pulscho system such as a radar and classifies the sources of the echo at each range resolution cell as either short-pulse interference, rain clutter or jamming, distributed land clutter... | 11/26/1985 |
| 4493647 | Weather radar simulator A beam position processor (15) generates address signals representing the spatial coordinates of points on a simulated radar beam, for a plurality of beam directions. The address signals serve for readout of weather information (e.g. cloud intensity, ceil... | 01/15/1985 |
| 4334223 | Median detector A median detector receives serially a series of numbers, the median of which is to be determined. The detector includes an ordered plurality of registers and a like plurality of comparators each associated with a different register. The respective compara... | 06/08/1982 |
| 4169263 | Variable threshold signal detecting apparatus A variable threshold detecting circuit for use with radar signals where a given target will appear with the same intensity on the screen whether the target is nearby or far away. The 1/R4 decrease in amplitude of the returned radar signal is co... | 09/25/1979 |
| 4127873 | Image resolution enhancement method and apparatus A frame of information to be displayed in the form of a row and column matrix of display elements is created from a corresponding group of data cells stored functionally in the form of a row and column matrix where the number of rows and columns in the st... | 11/28/1978 |
| 4106021 | Polar to rectangular coordinate converter A memory for a coordinate converter stores, for each azimuth at which information from an information source may be received in a polar coordinate system, the incremental X and Y coordinate values, ƊX and ƊY, for an incremental change in range along the... | 08/08/1978 |
| 4088996 | Radar signal processor A postdetection, digital radar signal processor for producing information for a PPI type display on a conventional CRT. Each line of the polar or PPI type display represents a summing of past and present returns received at substantially the same antenna ... | 05/09/1978 |
| 4059785 | CRT display with truncated Rho-Theta presentation In a CRT display exhibiting a Rho-Theta format where certain of the lines would normally extend beyond the edges of the CRT screen, feedback signals from at least a deflection coil are used to terminate display lines at the edge of the screen and to initi... | 11/22/1977 |
| 4015257 | Radar detection of turbulence in precipitation A technique for processing the IF portion of a radar return signal in order o provide the remote detection and measurement of atmospheric turbulence occurring within precipitation. The technique employs an amplitude limiter, a wideband discriminator and a ... | 03/29/1977 |
| 4014019 | Real time analog doppler processor for weather radar A technique for processing the IF portion of a radar return signal in order o produce a continuous voltage output which voltage is proportional to the instantaneous frequency of the received signal. The technique employs an amplitude limiter and a wideband... | 03/22/1977 |
| 3973258 | Transient event data acquisition apparatus for use with radar systems and the like The apparatus detects in real time the amplitude and range of certain traent events such as lightning discharges, the arrangement being such that a transient event which is capable of producing a return echo signal initially greater than other return sig... | 08/03/1976 |
