An algorithm for estimating the phase−error function of SAR raw data is described, which exploits reflectors consisting of several neighbouring point targets. In a first step the azimuth signal of a reflector, which appears as highlight in its near environment, is extracted and used to estimate the reflected azimuth signal of a single point target. In the second step a local phase−error functio...

The paper focuses on the limits of the performances of TOPSAR acquisition mode, in terms of image quality and particularly to signal to ambiguity ratio (DTAR). These limits are due to the unwanted antenna pattern side-lobes arising when the antenna beam is steered in azimuth. Some ideas that could be exploited to limit the effect of grating lobes on DTAR are discussed. Particularly, a novel acq...

This paper explores the potential of solar energy generation in the area of The Hashemite University in Jordan (32.05_N, 36.06_E) by investigating the optimal inclination and azimuth angles of photovoltaic (PV) modules for every hour, day, month, and of the whole year. The object of this study is to maximize the annual energy production of PV systems by tracking the changes of sun's position in...

The high squint diving SAR is widely used to provide the information in advance. Large squint angle deduces the deeper coupling of range and azimuth of SAR echoes which makes SAR imaging more difficult. Especially, the large range migration of the deep couple heavily burdens the imaging processing time and storage units. The diving motion of platform worsens the situation. This paper proposes t...

In this paper, we present an approach to estimate mobile sound source trajectory. An artificially created sound source signal is used in this work. The main aim of this paper is to estimate the mobile object trajectory via sound processing methods. The performance of generalized cross correlation techniques is compared with that of noise reduction filters for the success of trajectory estimatio...

This paper compares five Doppler centroid estimation methods which are :energy balancing, matched-correlation , maximum likelihood, correlation Doppler estimator(CDE) and sign Doppler estimator (SDE). Their estimation performances in raw data domain and image domain are studied. The computer simulation results are presented. ERS-1 raw data are also used to test the performances of every method....

In this paper the influence on azimuth performance of the antenna pattern in multi-channel SAR reconstruction algorithm is analysed and different approaches of its compensation described. Both transmit and receive antenna patterns affect the signals and hence have influence on performance of the whole system. Consideration of antenna pattern in the processing should help to achieve better perfo...

New methods have been investigated which use fully polarimetric synthetic aperture radar (POLSAR) image data to measure ocean wave slopes. Independent techniques have been developed to measure wave slope spectra in both the radar azimuth and range directions. Wave spectra measured using the new methods are compared with spectra developed using conventional SAR intensity-based methods, and with ...

I cast 3-D data regularization as a least-squares inversion problem. The model space is a four-dimensional (t , cmpx , cmpy ,hx ) hypercube. An interpolation operator maps to an irregular five dimensional space (t , cmpx , cmpy ,hx ,h y) which is then mapped back into a four dimensional space by applying Azimuth Move-Out (AMO). A regularization term minimizes the difference between various (t ,...

This document contains a report of our recent work in the area of transmission protocols for large-scale wireless sensor networks. We analyse a sensor network where the nodes do not have any knowledge about the network topology. The nodes are only aware of their own positions and the position of the nearest sink. We propose a MAC protocol that enables each transmitting node to choose its best n...