Results 61 to 70 of about 67,451 (128)

Radar Clutter Backscattering Simulation for Specific Sites [PDF]

, 2007
The state of development of the surface clutter prediction model DORTE is presented. This simulation program utilizes Digital Elevation Models and land use information to calculate reflectivity maps for specific sites with optional statistical variation ...
Rode, Gerald
core  

Remote oxygen sensing by ionospheric excitation (ROSIE) [PDF]

, 2009
The principal optical observable emission resulting from ionospheric modification (IM) experiments is the atomic oxygen red line at 630 nm, originating from the O(1D–3P) transition. Because the O(1D) atom has a long radiative lifetime, it is sensitive
Pedersen, T. R., Kosch, M.J., E. A. Kendall, Kendall, E. A., Slanger, T.G., Gustavsson, Björn Johan, Kendall, E.A., T. G. Slanger, Rietveld, Michael T, Gustavsson, B., K. S. Kalogerakis, Kalogerakis, K. S., Slanger, T. G., B. Gustavsson, M. T. Rietveld, M. J. Kosch, Kosch, M. J., Kalogerakis, K.S., T. R. Pedersen, Pedersen, T.R., Rietveld, M.T.   +20 more
core   +2 more sources

High Frequency Radar Perspective of Putative Subglacial Liquid Water on Mars

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Anomalously bright radar reflections from the base of Mars' south polar cap raise the tantalizing possibility of present‐day liquid water. Orosei et al. (2018, https://doi.org/10.1126/science.aar7268) first reported bright subsurface echoes from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) prompting studies of ...
Gareth A. Morgan, Matthew R. Perry, Bruce A. Campbell, Nathaniel E. Putzig, Jennifer L. Whitten, Fabrizio Bernardini   +5 more
wiley   +1 more source

A probabilistic hypothesis density filter for traffic flow estimation in the presence of clutter [PDF]

, 2012
Prediction of traffic flow variables such as traffic volume, travel speed or travel time for a short time horizon is of paramount importance in traffic control.
Romain Billot, Mihaylova, Lyudmila, Nour-Eddin El Faouzi, Matthieu Canaud, Sau, Jacques, Jacques Sau, Lyudmila Mihaylova, Canaud, Matthieu, El Faouzi, Nour-Eddin, Billot, Romain   +9 more
core   +1 more source

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., Macdougall, J.W., Denton, M. H., Mitchell, C.N., Pokhotelov, D.   +4 more
core   +3 more sources

Clutter rejection for MTI radar using a single antenna and a long integration time [PDF]

, 2011
Moving Target Indicators (MTI) are airborne radar systems designed to detect and track moving vehicles or aircrafts. In this paper, we address the problem of detecting hazardous collision targets to avoid them.
Jean-Yves Tourneret, Goy, Philippe, Philippe Goy, Tourneret, Jean-Yves, Francois Vincent, Vincent, François   +5 more
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

Statistical Analysis of Performance of Optimisation‐Based SAR Autofocus

IET Radar, Sonar & Navigation
Transionospheric 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, Mikhail Gilman, Semyon Tsynkov   +2 more
doaj   +1 more source

Ship Echo Discrimination in HF Radar Sea-Clutter

, 2003
International audienceHF radar can provide Over the Horizon detection of ships on very large oceanic areas, making use of the ionospheric refraction of radio waves. The Doppler spectrum of the sea clutter is composed of the first-order Bragg lines with a
Bourdillon, Alain, Auffray, Gilbert, Dorey, Philippe   +2 more
core   +1 more source

The Doppler Spectra of Medium Grazing Angle Sea Clutter; Part 1: Characterisation [PDF]

, 2016
This paper is concerned with the characterisation of Doppler spectra from high range resolution X-band radar sea clutter observed from an airborne platform over the range of grazing angles, 15° to 45°.
Rosenberg, L, Ritchie, MA, Watts, S, Bocquet, S   +3 more
core