Results 21 to 30 of about 65,382 (157)
Ground clutter cancellation in incoherent radars: solutions for EISCAT Svalbard radar [PDF]
Annales Geophysicae, 2000 Incoherent scatter radars measure ionosphere parameters using modified Thomson scatter from free electrons in the target (see e.g. Hagfors, 1997). The integrated cross section of the ionospheric scatterers is extremely small and the measurements can ...
T. Turunen +2 more
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IEEE Access, 2020 For high-frequency surface wave radar (HFSWR), the unwanted radio wave originated from the ionosphere is commonly called ionospheric clutter. Its presence seriously affects the performance of the HFSWR and extremely degrades the radar capability to ...
Yunlong Yang +3 more
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Remote Sensing, 2022 In high-frequency surface wave radar (HFSWR) systems, clutter is a common phenomenon that causes objects to be submerged. Space-time adaptive processing (STAP), which uses two-dimensional data to increase the degrees of freedom, has recently become a ...
Jiaming Li +4 more
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International Journal of Antennas and Propagation, 2020 In high-frequency (HF) hybrid sky-surface wave radar, the first-order sea clutter broadening is severe under the action of ionospheric phase disturbance and bistatic angles. In this paper, a cascaded method is described to suppress the spread sea clutter.
Zhuo-qun Wang +6 more
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 The P-band spaceborne synthetic aperture radar (SAR) is significantly affected by ionospheric scintillation. Although the traditional phase gradient autofocus (PGA) can estimate and compensate for the scintillation phase of the single-polarization SAR ...
Hongcheng Zeng +3 more
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IET Radar, Sonar & Navigation, 2023 A great interest has been directed towards high frequency surface wave radar (HFSWR), because it is applied as long‐range early warning and real‐time measurements of sea surface condition tools in maritime surveillance.
Xiaowei Ji +3 more
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A Comparative Study on Radio Frequency Interference Suppression and foF2 Scaling for Ionograms
Remote Sensing, 2023 In this paper, we compare the performances of radio frequency interference (RFI) suppression between radio frequency interference mitigation (RFIM) and frequency-domain adaptive clutter suppression (FACS) algorithms that apply to ionograms for foF2 ...
Zhao-Yu Chen +6 more
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Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays [PDF]
, 2012 Equivalent ionospheric currents obtained with the spherical elementary current systems (SECS) method and derived from nearly 100 ground magnetometers spread over North America and Greenland are compared with ionospheric flow vectors measured by the ...
Angelopoulos, V. +6 more
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Ionospheric response to the corotating interaction region-driven geomagnetic storm of October 2002 [PDF]
, 2009 Unlike the geomagnetic storms produced by coronal mass ejections (CMEs), the storms generated by corotating interaction regions (CIRs) are not manifested by dramatic enhancements of the ring current. The CIR-driven storms are however capable of producing
Jayachandran, P.T. +4 more
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IET Radar, Sonar & Navigation, 2023 Small‐array high‐frequency surface wave radar (HFSWR) is widely used to monitor maritime targets as it can be used to save on‐land resources. In small‐array HFSWR systems, the main lobe of the receiving angle spectrum is significantly broadened.
Jiaming Li, Qiang Yang, Xin Zhang
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