Results 71 to 80 of about 279 (160)

An integrated maritime surveillance system based on high-frequency surface-wave radars, Part 1: Theoretical background and numerical simulations

, 2001
In this two-part paper, an integrated maritime surveillance (IMS) system, based on high-frequency surface-wave radars (HFSWR), is described. IMS provides low-cost, 24-hour, real-time, over-the-horizon surveillance of large ocean areas, out to the 200 ...
Ponsford, A, Sevgi, L, Chan, HC
core   +1 more source

Novel multi-mode shortwave broadcast transmitting antenna array. [PDF]

Sci Rep, 2022
Yao W, Gao H, Tian Y, Lu T, Zhang X.
europepmc   +1 more source

Radar Space-Time Processing for Range-Folded Spread-Doppler Clutter Mitigation

, 2011
Pulsed radars have an ambiguous relationship between range and velocity which is proportional to the pulse repetition frequency (PRF), leading to potential tradeoffs.
Lee, William Weiham
core  

Geospace Plume and Its Impact on Dayside Magnetopause Reconnection Rate. [PDF]

J Geophys Res Space Phys, 2021
Zou Y, Walsh BM, Shi X, Lyons L, Liu J, Angelopoulos V, Ruohoniemi JM, Coster AJ, Henderson MG.   +8 more
europepmc   +1 more source

Performance Analyses of a RAIM Algorithm for Kalman Filter with GPS and NavIC Constellations. [PDF]

Sensors (Basel), 2021
Bhattacharyya S.
europepmc   +1 more source

Exploring the Interior of Europa with the Europa Clipper. [PDF]

Space Sci Rev, 2023
Roberts JH, McKinnon WB, Elder CM, Tobie G, Biersteker JB, Young D, Park RS, Steinbrügge G, Nimmo F, Howell SM, Castillo-Rogez JC, Cable ML, Abrahams JN, Bland MT, Chivers C, Cochrane CJ, Dombard AJ, Ernst C, Genova A, Gerekos C, Glein C, Harris CD, Hay HCFC, Hayne PO, Hedman M, Hussmann H, Jia X, Khurana K, Kiefer WS, Kirk R, Kivelson M, Lawrence J, Leonard EJ, Lunine JI, Mazarico E, McCord TB, McEwen A, Paty C, Quick LC, Raymond CA, Retherford KD, Roth L, Rymer A, Saur J, Scanlan K, Schroeder DM, Senske DA, Shao W, Soderlund K, Spiers E, Styczinski MJ, Tortora P, Vance SD, Villarreal MN, Weiss BP, Westlake JH, Withers P, Wolfenbarger N, Buratti B, Korth H, Pappalardo RT, Interior Thematic Working Group.   +61 more
europepmc   +1 more source

Simulation of ionospheric effects and their mitigation for the ESA BIOMASS P-band space-based radar

, 2011
The European Space Agency (ESA) is conducting Phase A studies of a 435 MHz low-earth orbiting polarimetric synthetic aperture radar (SAR) called BIOMASS.
Quegan, Shaun, Rogers, Neil
core  

MONOSTATIC AND BISTATIC ELECTROMAGNETIC SIGNATURE OF SEA AND GROUND CLUTTER IN HF BAND ESTIMATED BY USING SPM, TSM AND SSA MODELS

, 2012
International audienceTo cover a large area, the use of HF radars is preferred to classical radars one because HF radars are not limited by EM horizon. On counterpart, antennas of HF radars are huge and ionospheric and surface clutters disturb the use of
Khenchaf, Ali, Vaitilingom, Laurent
core   +1 more source

Performance analysis of phase gradient autofocus for compensating ionospheric phase scintillation in BIOMASS P-band SAR data

, 2015
The P-band synthetic aperture radar of the European Space Agency BIOMASS mission will be affected by ionospheric phase scintillation at high latitudes, which introduces a random high-order azimuth phase error.
Li, Zhuo, Quegan, Shaun, Rogers, Neil, Chen, Jie   +3 more
core  

Enhanced detection of small targets in ocean clutter for high frequency surface wave radar

, 2009
The small target detection in High Frequency Surface Wave Radar is limited by the presence of various clutter and interference. Several novel signal processing techniques are developed to improve the system detection performance.
Lu, Xiaoli
core