Results 61 to 70 of about 23,415 (245)
Remote temperature profiling in the troposphere and stratosphere by the radio-acoustic sounding technique [PDF]
, 1986 Radar application of the radio-acoustic sounding technique uses the Doppler frequency shift of radar echoes returning from the atmospheric wave structure, in association with a traveling acoustic pulse transmitted from the ground, to determine the speed ...
Inuki, H., Masuda, Y., Matuura, N.
core +1 more source
Advanced Synthetic Aperture Radar Based on Digital Beamforming and Waveform Diversity [PDF]
, 2008 This paper introduces innovative SAR system concepts for the acquisition of high resolution radar images with wide swath coverage from spaceborne platforms.
Gebert, Nicolas +3 more
core +1 more source
Radio Science, Volume 61, Issue 1, January 2026.Abstract Incoherent scatter radar probing of the topside F‐region ionosphere with reduced electron densities residing at relatively large radar ranges requires the use of uncoded long pulse (ULP) transmissions. In these ULP measurements the range resolution is necessarily poor, rendering the inference of ionospheric state parameters such as composition,
Binghui Wang +3 more
wiley +1 more source
Multibeam single frequency synthetic aperture radar processor for imaging separate range swaths [PDF]
, 1982 A single-frequency multibeam synthetic aperture radar for large swath imaging is disclosed. Each beam illuminates a separate ""footprint'' (i.e., range and azimuth interval).
Jain, A.
core +1 more source
Ambiguity function and accuracy of the hyperbolic chirp: comparison with the linear chirp [PDF]
, 2017 In this paper, we derive the Ambiguity Function (AF) of a narrowband and a wideband hyperbolic chirp. We calculate the second derivatives of the squared amplitude of the narrowband Complex Ambiguity Function (CAF) and use them to calculate the Fisher ...
Balleri, Alessio, Farina, Alfonso
core +1 more source
Radio Science, Volume 61, Issue 1, January 2026.Abstract A method of estimating heavy (O+) and light (H+ and He+) ion drift velocities in the topside F‐region ionosphere using Arecibo uncoded long pulse data is presented. We show that multi‐ion drift velocity estimation using long pulse ACF phase data requires accurate knowledge of ionospheric state parameters, such as temperatures and compositions,
Binghui Wang, Erhan Kudeki, Yulun Wu
wiley +1 more source
Earth and Space Science, Volume 13, Issue 1, January 2026.Abstract Lidar observations of atmospheric gravity waves (GWs) have been made spanning 14 years above McMurdo Station, Antarctica. Using these extensive observations and interleaved data processing techniques which enable bias‐free/noise‐floor‐free estimation of GW parameters, this study forms seasonal baselines for GW potential energy densities (Epm ...
Jackson Jandreau, Xinzhao Chu
wiley +1 more source
Radar detection and speed estimation of high‐speed targets using phase‐modulated waveforms
Electronics Letters, 2023 Specifying parameters of high‐speed targets as range and velocity in radar systems operating with phase‐modulated signals is a problematic process because of the serious effect of high Doppler frequency on these types of waveforms.
Alaa G. Zahra +3 more
doaj +1 more source
Synthetic aperture radar target simulator [PDF]
, 1984 A simulator for simulating the radar return, or echo, from a target seen by a SAR antenna mounted on a platform moving with respect to the target is described.
Bickler, T. C. +3 more
core +1 more source
Time-frequency represetation of radar signals using Doppler-Lag block searching Wigner-Ville distribution [PDF]
, 2018 Radar signals are time-varying signals where the signal parameters change over time. For these signals, Quadratic Time-Frequency Distribution (QTFD) offers advantages over classical spectrum estimation in terms of frequency and time resolution but it ...
Hamdi, Muhammad Noor Muhammad +1 more
core +3 more sources