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Radiometry offers the possibility to measure slant-path attenuation through the radiometer formula. But lack of a clear method to obtain an accurate estimate of the effective medium temperature (Tmr) and limited experimental characterization has contributed to uncertainty it is use. This contribution examined the use of the radiometer formula with measurements of brightness temperature, attenuation,...
This paper describes the design and performance of a Ka-Band beacon receiver developed at NASA Glenn Research Center (GRC) that will be installed alongside an existing Ka-Band Radiometer [2] located at the east end of the Svalbard Near Earth Network (NEN) complex. The goal of this experiment is to characterize rain fade attenuation to improve the performance of existing statistical rain attenuation...
Slant path brightness temperatures were measured at 72.5 and 82.5 GHz with a multi-channel radiometer. One year of measurements collected at 36° elevation angle in Rome, NY were examined in terms of the attenuation statistics. The radiometric response was modeled with Monte-Carlo solution of the radiative transfer equation. The measured statistics were examined in relation to attenuation prediction...
The design and operation of communication systems that include fade mitigation techniques (FMTs) needs the use of in-depth information regarding the expected propagation effects. This information can be obtained from propagation experiments. The equipment used in these experiments often combines, within the same experimental setup, a beacon receiver and a radiometer working in the same frequency band...
Ground-based microwave radiometer profilers in the 20-60-GHz range operate continuously at numerous sites in different climate regions. Recent work suggests that a 1-D variational (1-DVAR) technique, coupling radiometric observations with outputs from a numerical weather prediction model, may outperform traditional retrieval methods for temperature and humidity profiling. The 1-DVAR technique is applied...
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