Results 271 to 280 of about 69,955 (288)
Some of the next articles are maybe not open access.
Doppler Radar with Polarization Diversity
Journal of the Atmospheric Sciences, 1973Abstract In this note we propose a technique to uncouple the tie between unambiguous Doppler velocity and range. Transmission of orthogonally polarized waves in pairs of pulses increases a weather Doppler radar's capability to unambiguously resolve velocity spectrum mean and variance at simultaneous range locations sampled in real time.
Richard J. Doviak, D. Sirmans
openaire +2 more sources
The delay/Doppler radar altimeter
IEEE Transactions on Geoscience and Remote Sensing, 1998The key innovation in the delay/Doppler radar altimeter is delay compensation, analogous to range curvature correction in a burst-mode synthetic aperture radar (SAR). Following delay compensation, height estimates are sorted by Doppler frequency, and integrated in parallel. More equivalent looks are accumulated than in a conventional altimeter.
openaire +1 more source
Doppler shift for a radar echo
American Journal of Physics, 1979The Doppler shift formula for a radar echo is derived without the use of transformation equations by considering the superposition of the incident and reflected waves. The results are then used as a basis for a discussion of the concepts of proper length and time as regards the transformation properties of wavelength and period in special relativity.
openaire +2 more sources
Science, 1973 2010 International Waveform Diversity and Design Conference, 2010
Modern military airborne radars are highly sophisticated, multi-mode systems which are required to detect difficult targets in all aspects and over a large range/velocity detection space. There are particular difficulties associated with the airborne case such as the limited antenna aperture, high platform velocity and severe clutter levels which ...
openaire +2 more sources
Modern military airborne radars are highly sophisticated, multi-mode systems which are required to detect difficult targets in all aspects and over a large range/velocity detection space. There are particular difficulties associated with the airborne case such as the limited antenna aperture, high platform velocity and severe clutter levels which ...
openaire +2 more sources
2014
The main objective of this chapter is to describe how an airborne pulse-Doppler radar isolates targets of interest from clutter and measures target range and velocity. Related topics such as pulse compression, automatic detection, target tracking, and target and clutter statistics are described.
openaire +2 more sources
The main objective of this chapter is to describe how an airborne pulse-Doppler radar isolates targets of interest from clutter and measures target range and velocity. Related topics such as pulse compression, automatic detection, target tracking, and target and clutter statistics are described.
openaire +2 more sources
A security Doppler radar experiment
2016 IEEE Radar Methods and Systems Workshop (RMSW), 2016The paper presents an indoor experimental study of the “NORMA” security Doppler radar's information signal, with a human target moving across and along the detector's radiation direction.
openaire +2 more sources
Estimation Of Range-doppler Radar Images
1993 IEEE International Symposium on Circuits and Systems, 2002It is shown that most accurate reconstruction of a range-Doppler target density that can be computed from N waveforms and their echoes is obtained by transmitting the singular functions corresponding to the N largest singular values of two kernels derived from the target density.
openaire +2 more sources
1987
Relative motion between a signal source and a receiver creates a Doppler shift of the source frequency. Likewise, when a radar system illuminates a moving target that has a radial velocity component relative to the radar, the signal reflected from the target and received by the radar is also frequency shifted.
openaire +2 more sources
Relative motion between a signal source and a receiver creates a Doppler shift of the source frequency. Likewise, when a radar system illuminates a moving target that has a radial velocity component relative to the radar, the signal reflected from the target and received by the radar is also frequency shifted.
openaire +2 more sources