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| Number | Title | Issue Date |
| 4529983 | Apparatus and method for the correction of attenuation-induced errors in a weather radar receiver Disclosed is a method and apparatus for adjusting the gain in a weather radar receiver to correct for precipitation induced transmission path attenuation. The receiver gain is controlled in a known manner to accommodate known path transmission effects. Th... | 07/16/1985 |
| 4521857 | Aviation weather information dissemination system An aviation weather information dissemination system and method involves regional weather-information accumulating and interpreting stations (12A-O) located throughout a geographic area (10). Each regional weather-information and interpreting station comm... | 06/04/1985 |
| 4463357 | Method and apparatus for calibrating the ionosphere and application to surveillance of geophysical events The columnar electron content of the ionosphere between a spacecraft (10) and a receiver (12, 14) is measured in realtime by cross correlating two coherently modulated signals transmitted at different frequencies (L1, L2) from the sp... | 07/31/1984 |
| 4370652 | Control systems for radar receivers An echo ranging weather radar system in which the bandwidth B of the radar receiver is made roughly equal to the bandwidth of the frequency spectrum of at least some expected weather echoes. In one embodiment, B TR is made equal to duri... | 01/25/1983 |
| 4356487 | Sounding apparatus The present sounding apparatus is used for the detection and measurement of phenomena relating to the area surrounding the earth's globe. It can in particular be used in the study of the ionosphere and specifically for the study of limited amplitude, shor... | 10/26/1982 |
| 4351188 | Method and apparatus for remote measurement of wind direction and speed in the atmosphere An acoustic wave source and a radio wave source are installed close to each other on the ground. When an acoustic wave pulse is transmitted vertically into the atmosphere by the acoustic wave source, spherical wavefronts formed in the atmosphere by the ac... | 09/28/1982 |
| 4348693 | Television weather radar system Information from a weather radar system (10) is gathered by a data transmitter (20) and sent to a data receiver (25) via a telephone or data line (30). The radar video information for each radial is divided into segments and temporarily stored in a memory... | 09/07/1982 |
| 4347618 | Apparatus for processing weather radar information A system for providing remote locations with processed data relating to weather conditions or the like. A transmitter adapted to receive complex, real-time radar data, including azimuth, range and elevation from the National Weather Bureau (NWB) radar net... | 08/31/1982 |
| 4318100 | Automatic ground clutter rejection in weather pulse radar system In a weather radar system wherein echo signals are linear-detected from the waves received at the radar, each one of echo signals being compared with the later one to derive AC component, and the mean power of the weather echo estimated from the power of ... | 03/02/1982 |
| 4286462 | Acoustic detection of wind speed and direction at various altitudes An acoustic apparatus for ascertaining wind speed and direction at various altitudes which uses back scattered acoustic waves which are formed from acoustic pulses of predetermined frequencies, are transmitted on at least two planes and the frequency spec... | 09/01/1981 |
| 4268828 | Swept frequency radar system employing phaseless averaging Described herein is a microwave radar system which employs heterodyned swept frequency at approximately two millisecond sweep intervals. The power source is a reliable solid state, low power device such as a Gunn diode. The heterodyned difference frequenc... | 05/19/1981 |
| 4222265 | Apparatus for automatically measuring the vertical profile of the temperature in the atmosphere An apparatus for automatically measuring the vertical profile of the temperature in the atmosphere. The temperature of the air is obtained by the measurement of the propagation speed of sound wave pulses, to which it is directly related, by means of a con... | 09/16/1980 |
| 4219887 | Bistatic acoustic wind monitor system In a Doppler acoustic radar system, bistatic transmitting and receiving antennas are employed in a manner to significantly improve wind measurement performance, and to simplify equipment deployment.... | 08/26/1980 |
| 4172255 | HF coastal current mapping radar system A system for radar remote sensing of near surface ocean currents in coastal regions. The system employs a pair of low power, transportable high frequency radar units to scatter signals from the shore off to the ocean waves. Underlying surface currents imp... | 10/23/1979 |
| 4164739 | Reduction of target shift in coordinate converter In a coordinate converter in which more than one input address corresponds to one output address (related to a specific location on a display screen) and in which input addresses can occur in either of two sequences, an apparatus is disclosed for changing... | 08/14/1979 |
| 4139847 | Automatic ground-clutter rejection in weather pulse radar system Ground clutter is automatically eliminated from echo signals in a weather pulse radar system to provide signals having an amplitude corresponding to the average intensity of the weather echo over a number of pulses. The reflected waves received in the rec... | 02/13/1979 |
| 4041491 | Method and apparatus for determining the altitude of a signal propagation path A method and apparatus for determining the altitude of a transmitted signal by adding the altitude of the transmitting antenna to accumulated changes in altitude, determined in relation to the sine function of the elevation angle of the propagation path. ... | 08/09/1977 |
| 4011565 | Method of determining ionospheric reflection height A method for determining the ionospheric reflection height from doppler measurements made over an oblique radio transmission involving reflection of signals from a boundary. This method makes use of multi-hop reflections. The unknown motion of the reflect... | 03/08/1977 |
| 3938145 | Fast-scanning broad band radar system Reflectivity estimates from clouds and other clutter targets normally reqe an averaging of a large number of independent radar pulse samples. If the radar generates noise pulses of a predetermined bandwidth and pulse length, a large number of returns can... | 02/10/1976 |
