Results 1 to 10 of about 141,810 (209)
Characterizing animal anatomy and internal composition for electromagnetic modelling in radar entomology [PDF]
Remote Sensing in Ecology and Conservation, 2019 The use of radar as an observational tool in entomological studies has a long history, and ongoing advances in operational radar networks and radio‐frequency technology hold promise for advances in applications such as aerial insect detection ...
Djordje Mirkovic +4 more
doaj +4 more sources
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Conventional airborne radar sounding techniques are well suited to the detection and characterization of flat-lying, specular subglacial water bodies. However, topographically positive, diffusively scattering Röthlisberger (R-) channels are more ...
Kirk M. Scanlan +2 more
doaj +1 more source
Radar cross sections for mesospheric echoes at Jicamarca [PDF]
Annales Geophysicae, 2009 Radar cross sections (RCS) of mesospheric layers at 50 MHz observed at Jicamarca, Peru, range from 10−18 to 10−16 m−1, three orders of magnitudes smaller than cross sections reported for polar mesospheric winter echoes during solar ...
G. A. Lehmacher +5 more
doaj +1 more source
Sensors, 2020 The increasing interest in the radar detection of low-elevation and small-size targets in complicated ground environments (such as urban, suburban, and mixed country areas) calls for a precise quantification of the radar detection capabilities in those ...
Gaspare Galati +2 more
doaj +1 more source
IET Radar, Sonar & Navigation, 2023 An efficient number estimation method is proposed for target detection by using the forward‐backward matrix pencil method. Compared with the traditional parameter estimation methods, the proposed method can work well even for sparse signals.
Xiyuan Sun +6 more
doaj +1 more source
Terahertz radar cross section measurements [PDF]
35th International Conference on Infrared, Millimeter, and Terahertz Waves, 2010 We perform angle- and frequency-resolved radar cross section (RCS) measurements on objects at terahertz frequencies. Our RCS measurements are performed on a scale model aircraft of size 5-10 cm in polar and azimuthal configurations, and correspond closely to RCS measurements with conventional radar on full-size objects.
Iwaszczuk, Krzysztof +2 more
openaire +3 more sources
Anomalous Reflection From a Phase Gradient Metasurface With Arbitrary Incident Angle
IEEE Access, 2023 A planar phase gradient metasurface (PGM) with phase gradients in two in-plane directions will introduce two additional wave vectors to the reflected wave vector.
Wihan Barnard +2 more
doaj +1 more source
On Theoretical Accuracy of Meteorological Targets Measurement by Radar [PDF]
Radioengineering, 2022 We draw your attention to the fact that meteorological radar does not actually measure a commonly used quantity “radar reflectivity factor,” (which is not dependent on frequency) but a different quantity called “radar reflectivity.” We present the usual ...
O. Fiser, M. Kovalchuk
doaj
Changing flight heading during pass to enhance SAR change detection performance
IET Radar, Sonar & Navigation, 2021 Due to the wavelength‐resolution characteristics, wavelength‐resolution synthetic aperture radar (SAR) is considered for the change detection application aiming to achieve high detection probability and low false alarm rate.
Viet T. Vu +4 more
doaj +1 more source
Laboratory bistatic synthetic aperture radar coherent change detection investigation
Electronics Letters, 2023 Synthetic Aperture Radar (SAR) Coherent Change Detection (CCD) allows for the detection of very small scene changes. This is particularly useful for reconnaissance and surveillance as small changes such as vehicle tracks can be identified.
Alexander Hagelberg +2 more
doaj +1 more source