Study and realization of an UWB microwave radar based on phase conjugation. (Étude et réalisation d'un radar ULB à conjugaison de phase en micro-ondes)

Processus de traitement de données radar pour la reconnaissance/identification de cibles aériennes

Dans ce papier, nous proposons un processus de traitement permettant l’extraction des connaissances à partir d’un volume important de données pour l’aide à la décision dans un contexte opérationnel de la reconnaissance/identification de cibles radar non-coopératives. Les premiers travaux ont donc consistés à adapter le processus ECD (FIG.1) dans le domaine radar en tenant compte de la nature de...

Estimating soil moisture at the watershed scale with satellite-based radar and land surface models

Spatially distributed soil moisture profiles are required for watershed applications such as drought and flood prediction, crop irrigation scheduling, pest management, and determining mobility with lightweight vehicles. Satellite-based soil moisture can be obtained from passive microwave, active microwave, and optical sensors, although the coarse spatial resolution of passive microwave and the ...

Remote sensing applications to hydrology; imaging radar

Synthetic Aperture Radar (SAR) data are very useful for hydrological studies because the dielectric properties of materials are generally dependent on the amount of liquid water in the material, and this affects the strength of the radar backscatter, a°. Additionally, the ability of microwaves to penetrate the surface of many materials often permits analysis of subsurface properties. Further, S...

Design and Realization of an Improved De-Q-ing Circuit for Regulation of Modulator Output Pulse Amplitudes in a Radar Transmitter

Application of Radar and Ultrasonic Pulse Echo for Testing Concrete Structures

Nondestructive testing of concrete structures is one of the essential task for estimating or assessing the quality. In order to validate the advanced NDT equipments like Radar and Pulse Echo, a unique large scale reinforced concrete specimen was cast at SERC, Chennai, with columns and beams of different sizes, cross section having different percentages of reinforcement. The defects such as hone...