Comparative Analysis of Performance for Optimization‐Based Transionospheric SAR Autofocus
Radio Science, Volume 60, Issue 2, February 2025.Abstract For a spaceborne synthetic aperture radar (SAR) operating on low frequencies (such as P‐band), turbulence in the Earth's ionosphere may cause significant phase perturbations of the interrogating signals. These perturbations depend on both the antenna and target coordinates and may lead to substantial image distortions. In our previous work, we
Mikhail Gilman, Semyon Tsynkov
wiley +1 more source
Ambiguity and area preserving linear transformations in over‐the‐horizon radar
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.The use of recurrent waveforms in over‐the‐horizon radar (OTHR) necessitates techniques for ambiguity resolution and manipulation. In this paper, the authors elucidate methods for systematically transforming any given waveform so that its ambiguity function is transformed by any desired area preserving the linear transformation of the delay‐Doppler ...
Stephen D. Howard, Van Khanh Nguyen
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Aperture-Dependent Injection of Ionospheric Perturbations Into Simulated SAR Data [PDF]
This letter presents an algorithm for the introduction of ionospheric disturbances into synthetic aperture radar (SAR) simulations in an aperture-dependent manner using subapertures.
Betancourt-Payan, Felipe +3 more
core +1 more source
Ionospheric clutter models for high frequency surface wave radar
, 2017 High frequency surface wave radar (HFSWR), operating at frequencies between 3 and 30 MHz, has long been employed as an important ocean remote sensing device.
Chen, Shuyan
core
High-latitude over-the-horizon radar applications [PDF]
, 2020 Dissertation (Ph.D.) University of Alaska Fairbanks, 2020Over-the-horizon radar (OTHR) systems that operate at high-latitudes often must contend with multipath and pronounced diffusive scattering effects produced by the anisotropic, birefringent, and ...
Theurer, Timothy E.
core
Statistical Analysis of Performance of Optimisation‐Based SAR Autofocus
IET Radar, Sonar & NavigationTransionospheric SAR autofocus is a variational algorithm designed to circumvent the deficiencies of conventional autofocus techniques in correcting the distortions of spaceborne SAR images due to ionospheric turbulence.
Patrick Haughey +2 more
doaj +1 more source
Channel probe measurements for the American sector clutter experiment, January, 1994
, 1994 The ionospheric phenomenon called Equatorial Spread F encompasses a variety of effects associated with plasma irregularities occurring in the post-sunset and nighttime ionosphere near the magnetic equator.
Fitzgerald, T. J.
core +1 more source
Topside Measurements at Jicamarca During the 2019-2020 Deep Solar Minimum. [PDF]
J Geophys Res Space Phys, 2021 Derghazarian S, Hysell DL, Varney RH.
europepmc +1 more source
Classification Method of Uniform Circular Array Radar Ground Clutter Data Based on Chaotic Genetic Algorithm. [PDF]
Sensors (Basel), 2021 Yang B +6 more
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High-Resolution Doppler and Azimuth Estimation and Target Detection in HFSWR: Experimental Study. [PDF]
Sensors (Basel), 2022 Golubović D, Erić M, Vukmirović N.
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