Abstract:
L'invention concerne un procédé d'estimation spectrale du fouillis d'un milieu liquide halin reçu par un radar océanographique, tel qu'un lac, un fleuve, une mer ou un océan, à partir d'un réseau d'antennes comportant au moins trois antennes. Il comporte les étapes suivantes : - une première étape (101) de formation d'au moins deux sous-réseaux d'antennes à partir du réseau d'antennes, chacun des sous-réseaux comportant au moins une antenne de moins que le réseau d'antennes; - une deuxième étape (102) de calcul d'un faisceau dans une direction pour chaque sous réseau d'antenne; - une troisième étape (103) de localisation en azimut de toutes sources comprise dans le faisceau à partir des données du faisceau provenant de chacun des sous-réseaux; - une quatrième étape (104) d'estimation de l'énergie de chacune des sources localisées; - une cinquième étape (105) de sélection d'une source, dite source préférée, parmi plusieurs sources selon un critère prédéterminé lorsque le faisceau comporte plusieurs sources.
Abstract:
The present invention provides an apparatus and method for obtaining data to determine one or more characteristics of a wind flow field using one or more radars. Data is collected from the one or more radars, and analyzed to determine the one or more characteristics of the wind flow field. The one or more radars are positioned to have a portion of the wind flow field within a scanning sector of the one or more radars.
Abstract:
The present invention provides a system and method for obtaining data to determine one or more characteristics of a wind field using a first remote sensing device and a second remote sensing device. Coordinated data is collected from the first and second remote sensing devices and analyzed to determine the one or more characteristics of the wind field. The first remote sensing device is positioned to have a portion of the wind field within a first scanning sector of the first remote sensing device. The second remote sensing device is positioned to have the portion of the wind field disposed within a second scanning sector of the second remote sensing device.
Abstract:
Technologies are described effective to implement an atmospheric radar system. An antenna array transmits a wave toward an atmospheric target and receives a reflected wave that includes voltages corresponding to backscattered radar signal measurements. A processor includes a coherency matrix generator module effective to receive the voltages and generate a coherency matrix. The processor further includes an eigenvalue calculator module effective to receive the coherency matrix and calculate eigenvalues of the coherency matrix The processor includes an eigenvalue variable calculator module effective to receive the eigenvalues and calculate eigenvalue meteorological variables from the eigenvalues. The processor further includes an atmosphere display module effective to receive the eigenvalue meteorological variables and generate an output signal that corresponds to the meteorological property of the atmospheric target in response.
Abstract:
A transportable weather radar having radar electronics functionally located above the elevational joint and a frame superstructure rotationally connected to the elevational joint onto which is mounted a parabolic radar antenna adapted for Doppler weather radar use. The radar has a rotational drive assembly mounted below and supporting the elevational joint and a harmonic drive unit positioned inside the elevational joint so that the antennae may be rotated without significant backlash during rotational changes. A hollow center in the rotational joint allows for the passing of electronics cable through the middle of the joint and down through rotating assemblies and to electronics in or adjacent to the radar pedestal.
Abstract:
SISTEMA E MÉTODO DE DETEÇÃO E LOCALIZAÇÃO DE ALVOS PONTUAIS E DISTRIBUÍDOS, compreendendo duas antenas fixas não direcionais com alta resolução em alcance utilizando teste de coerência (Γ) para localização de alvos diferenciados (A, B), sendo uma de ditas antenas fixas transmissora/receptora (TR-N, TR-L, TR-S, TR-O, B1, C1, D1, A2), e a outra sendo somente receptora (RA-N, RB-N, RA-L, RB-L, RA-S, RB-S, RA-O, RB-O). Preferencialmente são utilizadas antenas (30) com abertura (31) de 120 graus de azimute, direcionadas de 90 em 90 graus.
Abstract:
A system for draping meteorological data on a three dimensional terrain image has been developed. The system includes a central processing server that receives meteorological data in real time and drapes the meteorological data over a three dimensional terrain image. The image is then transmitted to a display computer for use by an end user.