University Corporation for Atmospheric Research

Other

Joshua Michael Wurman

Mitchell Alfred Randall

Chris Dale Burghart

Christopher Lee Holloway

Charles L Frush

The bistatic radar system uses a scanning beam antenna located at the transmitter to transmit a focused beam of high frequency energy into a predefined space, with the transmitted beam comprising a series of pulses. The transmitter also includes apparatus for determining pulse origination data comprising: pulse origination time and direction of propagation for each of the pulses in the transmitted beam emanating from the antenna, where the antenna is scanned in a predetermined scan pattern in at least an azimuthal direction. The bistatic radar system also includes at least one receiver, located at a site remote from the transmitter and includes apparatus for generating pulse component receipt data indicative of receipt of components of the pulses that are contained in the transmitted beam that are reflected from scatterers in the predefined space. The receivers all transmit their data, substantially instantaneously, as received back to a central processor, which synchronizes (collates) the data in order to calculate, in near real-time, vector wind fields, divergence, vorticity, etc. These calculations typically are performed in polar coordinates or can be performed in Cartesian coordinates. Thus, the present bistatic radar system performs near-real-time synchronization, collating, transmission, and processing of data received from one or more bistatic receivers and from a transmitting radar to produce weather data in a more timewise efficient manner.

Bistatic radar system for centralized, near-real-time synchronized, processing of data to identify scatterers

The bistatic radar network uses an incoherent transmitter for determining the presence, locus, motion, and characteristics of scatterers in a predefined space. The incoherent transmitter generates pulses of high frequency energy that vary in frequency and/or phase. The bistatic radar network having an incoherent transmitter uses a scanning beam antenna located at the transmitter to transmit a focused beam of high frequency energy into a predefined space, with the transmitted beam comprising a series of pulses, each pulse in the series of pulses having a varying frequency, phase, pulse origination time and direction of propagation as it is emanated from said antenna. The transmitter also includes apparatus for determining pulse origination data comprising: frequency, phase, pulse origination time and direction of propagation, for each of the pulses in the transmitted beam emanating from the antenna, where the antenna is scanned in a predetermined scan pattern in at least an azimuthal direction. The bistatic network also includes at least one receiver, located at a site remote from the transmitter and includes apparatus for generating pulse component receipt data indicative of receipt of components of the pulses that are contained in the transmitted beam that are reflected from scatterers in the predefined space, and a processor, responsive to receipt of the pulse origination data from the transmitter and the pulse component receipt data, for generating scatterer location data indicative of presence, locus, motion, and characteristics of scatterers in the predefined space.

Bistatic radar network having incoherent transmitter operating in a scanning mode to identify scatterers

The multiple beam radar system uses multiple simultaneously transmitted beams of high frequency energy to identify scatterers that are located in a predetermined volume of space. This multiple beam radar system simultaneously transmits several beams of high frequency energy, produced by an antenna which operates in a mechanically scanning mode, and simultaneously receives the returned radiation, which constitutes components of this narrow beam that have been reflected off scatterers located in the path of the beam. The transmitted (and thus received) frequency of each beam is different, providing information relating to the presence, locus and characteristics of the scatterers by analyzing the plurality of received beams. Each of the simultaneously transmitted beams are focused in a different direction by virtue of the fact that the antenna transmits beams of different frequencies in different directions, with the direction of each beam and the separation between beams being a function of the transmitted frequencies and the characteristics of the antenna.

Radar system having multiple simultaneously transmitted beams operating in a scanning mode to identify scatterers

The sky is scanned with transmitted radar pulse beam of electromagnetic radiation from a high gain antenna with a narrow viewing angle. Weather echos from the radar pulse are monitored with a low gain receiving antenna that has a wide, or moderate, viewing angle of the sky. The source location of echo signals along the direction of the radar pulse beam path are defined by synchronizing the sampling of the echo signal at the receiving station with the transmission of radar pulses at the transmitting station. The receiving station defines the location of an echo signal source by knowing the locations of the transmitting and receiving antennas, the pointing angle of the transmitted beam and the relative time between transmission of the radar pulse and receipt of each echo signal sample along the transmitted beam path. The relative time can be defined by synchronizing the sampling of the echo signal with each transmitted pulse.

Wide-angle multiple-doppler radar network

A multiple-Doppler radar network can be constructed using only one, traditional, transmitting pencil-beam radar and one or more passive, non-transmitting receiving sites. Radiation scattered from the pencil beam of the transmitting radar as it penetrates weather targets can be detected at the receive-only sites as well as at the transmitter. In a bistatic system, the location of targets in Cartesian space can be calculated from the pointing angle of the transmitting antenna and the time between transmission of a radar pulse from the transmitter and detection at a passive receiver site.

Receiver antenna for bistatic doppler radar network

The sky is scanned with transmitted radar pulse beam of electromagnetic radiation from a high gain antenna with a narrow viewing angle, and by monitoring the echoes with a low gain receiving antenna that has a wide, or moderate, viewing angle of the sky. The source of echo signals along the direction of the radar puls beam path are defined by synchronizing the sampling of the echo signal at the receiving station with the transmission of radar pulses at the transmitting station. The receiving station defines the location of an echo signal source by knowing the locations of the transmitting and receiving antennas, the pointing angle of the transmitted beam and the relative time between transmission of the radar pulse and receipt of each echo signal sample of along the transmitted beam path. The relative time can be defined by synchronizing the sampling of the echo signal with each transmitted pulse.

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Boulder, CO, United States of America

Joshua Michael Wurman