A Modified Stripmap SAR Processing for Vector Velocity Compensation Using the Cross-Correlation Estimation Method
نویسندگان
چکیده
منابع مشابه
Artifacts in Blood Velocity Estimation Using Ultrasound and Cross-correlation Artifacts in Blood Velocity Estimation Using Ultrasound and Cross-correlation
Estimation of blood velocities using ultrasound and time-domain cross-correlation is investigated. The measurement principle is introduced and the basic properties of the cross-correlation function is discussed. Expressions for the variance of the estimates of the peak location are given showing the innuence of integration time, transducer bandwidth and signal-to-noise ratio. It is also shown t...
متن کاملGPU Processing for UAS-Based LFM-CW Stripmap SAR
Unmanned air systems (UAS) provide an excellent platform for synthetic aperture radar (SAR), enabling surveillance and research over areas too difficult, dangerous, or costly to reach using manned aircraft. However, the nimble nature of the small UAS makes them more susceptible to external forces, thus requiring significant motion compensation in order for SAR images to focus properly. SAR back...
متن کاملVector Velocity Imaging Using Cross-Correlation and Virtual Sources
Previous investigations have shown promising results in using the directional cross-correlation method to estimate velocity vectors. The velocity vector estimate provides information on both velocity direction and magnitude. The direction is estimated by beamforming signals along directions in the range [0◦; 180◦[ and identifying the direction that produces the largest correlation across emissi...
متن کاملMotion Compensation Based on Signal Processing Method for Airborne SAR
In the synthetic aperture radar (SAR) system, the motion error is the main phase error sources and the motion compensation is very important. The phase gradient autofocus (PGA) is a state of art technique for phase error correction of SAR. It exploits the redundancy of the phase-error information among range bins by selecting the strongest scatter for each range bin and synthesizes them. The mo...
متن کاملDebris flow velocity estimation: a comparison between gradient-based method and cross-correlation method
Debris ow causes lot of damages all over the world. The surface velocity of such a natural random ow is one of the important physical parameters that are considered in drawing a hazard map or constructing a sediment control dam. Gradient-based method along with a multiscale smoothing operation nds application in the twodimensional velocity estimation of a debris ow from its video images. This p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Electromagnetic Engineering and Science
سال: 2019
ISSN: 2671-7255,2671-7263
DOI: 10.26866/jees.2019.19.3.159