搜索结果: 1-12 共查到“Radars”相关记录12条 . 查询时间(0.058 秒)
Evolution of Bearing Determination in HF Current Mapping Radars
Bearing Determination HF Current Mapping Radars
2015/8/10
Nearly all target detection "radars" in existence operate at microwave frequencies because their wavelengths are small enough that compact antennas provide both good angular resolution and high sensit...
BEAM STEERING CONTROL SYSTEM FOR LOW-COST PHASED ARRAY WEATHER RADARS: DESIGN AND CALIBRATION TECHNIQUES
Phased Arrays Electronically scanned antennas Radars T/R modules Phased array calibration Radar Calibration
2014/11/7
Phase array antennas are a promising technology for weather surveillance radars. Their fast beam steering capability offer the potential of improving weather observations and extending warning lead ti...
Antenna systems with beam forming and beam steering capabilities for HF skywave radars
HF radars HF communication Skywaves ionospheric reflections Earth- ionosphere waveguide planar arrays
2010/10/12
Radiation characteristics of linearly phased, periodic, planar dipole arrays, which can be used as transmitting/receiving antenna systems for HF skywave radars, are investigated. Rectangular, triangul...
Propagation modeling and path loss prediction tools for high frequency surface wave radars
Groundwaves Surface waves High Frequency High Frequency Surface Wave Radar Mixed-Path Propagation Millington Effect Path Loss Parabolic Equation
2010/10/12
Propagation modeling and simulation approaches for the use of High Frequency Surface Wave Radar (HFSWR) are discussed. HFSWR uses vertically polarized surface waves along multi-mixed paths in the lowe...
Implementation of method for operating multiple high frequency surface wave radars on a common carrier frequency
High frequency surface wave radar common frequency doppler processing ionosphere
2010/10/12
The increasing use of High Frequency Surface Wave Radar (HFSWR) for the surveillance of coastal regions is faced with the problem of limited channel availability in the electromagnetic spectrum. Thus,...
Modeling and simulation strategies in high frequency surface wave radars
Radar HF radar surface wave HF radar HFSWR propagation noise clutter RCS
2010/10/12
Surface Wave High Frequency Radars (SWHFR) are taken into account in the content of modeling and simulation challenges. Examples related to multi-mixed path surface wave propagation, radar cross secti...
Dual-use of compact HF radars for the detection of mid- and large-size vessels
HF radar object detection networks ocean currents remote sensing
2010/10/12
This paper describes the development of the SeaSonde High Frequency Radar system into a dual-use application for the mapping of ocean surface currents and detection of ships at sea. This development e...
Synergetic use of millimeter- and centimeter-wavelength radars for retrievals of cloud and rainfall parameters
millimeter- and centimeter-wavelength radars cloud and rainfall parameters
2010/8/12
A remote sensing approach for simultaneous retrievals of cloud and rainfall parameters in the vertical column above the US Department of Energy's (DOE) Climate Research Facility at the Tropical Wester...
Comparative rainfall data analysis from two vertically pointing radars,an optical disdrometer,and a rain gauge
rainfall data analysis vertically pointing radars optical disdrometer rain gauge
2009/11/2
The authors present results of a comparative analysis of rainfall data from several ground-based instruments. The instruments include two vertically pointing Doppler radars, S-band and X-band, an opti...
Investigation of inertia-gravity waves in the upper troposphere/lower stratosphere over Northern Germany observed with collocated VHF/UHF radars
inertia-gravity waves upper troposphere Northern Germany VHF/UHF radars
2009/2/5
A case study to investigate the properties of inertia-gravity waves in the upper troposphere/lower stratosphere has been carried out over Northern Germany during the occurrence of an upper tropospheri...
Rainfall rate retrieval in presence of path attenuation using C-band polarimetric weather radars
Rainfall rate path attenuation C-band polarimetric weather radars
2009/12/29
Weather radar systems are very suitable tools for the monitoring of extreme rainfall events providing measurements with high spatial and temporal resolution over a wide geographical area. Nevertheless...
Analysis of severe convective events from two operational dual polarisation doppler radars
severe convective events operational dual polarisation doppler radars
2009/12/29
The recent gradual increase in the use of polarimetric radars prompts for possible improvements in the estimation of precipitation and the identification of the prevailing hydrometeor type. An analysi...