نتایج جستجو برای: ku and ka band
تعداد نتایج: 16850046 فیلتر نتایج به سال:
Reliable microwave link system requires models that are location-dependent with meteorological data from location of consideration. Adaptation and analytical a different climatological pattern often prove inadequate when used for another location. Hence, prediction attenuation attributed to water vapor oxygen in Abuja (9.0765⁰ N, 7.3986⁰ E), Nigeria development mathematical model using Meteorol...
In this paper satellite wave propagation at Ku and Ka band is considered. The design and simulation of a typical satellite beacon receiver at Ka band is designed and simulated for the future works. Also rain attenuation prediction at Ku band using satellite signal beacon measurement and simulations for Iran Telecommunication Research Center (ITRC) are presented. The measurement setup consists o...
113 INTRODUCTION The growing demand from the commercial and military sectors for on-the-move communications at high data rates has generated interest in a new type of satellite terminal. These terminals can provide broadband communications from maritime vessels, trains, airplanes, land vehicles, and other transportation systems. Although the interest in the commercial sector is primarily in bro...
Following on the successful introduction of single-frequency (Ku-Band) weather radar onboard the Tropical Rain Measuring Mission (TRMM) satellite in 1997, the Global Precipitation Measurement (GPM) mission attempts to advance further the goal of making global scale precipitation observations by deploying the next generation of satellite-borne weather radars. The GPM satellite will carry a Ka-Ku...
The sensitivity of radar backscattering cross sections on different snowflake shapes is studied at C, Ku, Ka, and W bands. Snowflakes are simulated using two complex shape models, namely, fractal and aggregate, and a soft spheroid model. The models are tuned to emulate physical properties of real snowflakes, that is, the mass–size relation and aspect ratio. It is found that for particle sizes u...
Fade and interfade duration distributions derived from Kuand Ka-band slant-path measurements in several temperate and tropical locations and different path geometries are used to get insight into the dependence of distributions on fade threshold, frequency, elevation angle and climate. Comparisons of average lognormal fits to duration distributions were used to investigate these dependencies. A...
Radar altimeters are important tools to monitor the volume of ice sheets. The penetration radar waves in snowpack is a major source uncertainty retrieve surface elevation. To correct this effect, better understanding sensitivity waveforms snow properties needed. Here, we present an extension Snow Model Radiative Transfer (SMRT) compute and conduct series simulations on Antarctic sheet. SMRT dri...
Abstract. Wind-driven redistribution of snow on sea ice alters its topography and microstructure, yet the impact these processes radar signatures is poorly understood. Here, we examine effects over Arctic waveforms backscatter obtained from a surface-based, fully polarimetric Ka- Ku-band at incidence angles between 0∘ (nadir) 50∘. Two wind events in November 2019 during Multidisciplinary drifti...
The Global Precipitation Measurement (GPM) Dual-Frequency Radar (DPR) (Ku- and Ka-band, or 14 35 GHz) provides the capability to resolve precipitation structure under moderate heavy conditions. In this manuscript, use of near-coincident observations between GPM CloudSat Profiling (CPR) (W-band, 94 are demonstrated extend representing light rain cold-season from DPR passive microwave constellati...
The Global Precipitation Measurement (GPM) Dual-frequency Radar (DPR) has operated in full scan (FS) mode both the Ku-band and Ka-band since May 2018. This FS can enable about 245 km swath dual-frequency processing for first time, whereas previous algorithms enabled narrower inner swath, having a width of approximately 125 km. paper describes classification (CSF) module newly developed DPR leve...
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