Journal ArticleDOI
Test of a ground-based microwave radiometer for atmospheric temperature profiling with meteorological applications
Jan Askne,G. Skoog,E. Winberg +2 more
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TLDR
The performance of a ground-based microwave radiometer of new design to be used for remote sensing of the temperature profile of the atmosphere has been tested in this article, where the radiometer measurements have been analyzed with the statistical inversion method and the retrieved profiles have been compared with 28 simultaneous radiosoundings.Abstract:
The performance of a ground-based microwave radiometer of new design to be used for remote sensing of the temperature profile of the atmosphere has been tested. It is continuously tunable in the range 52-8-58-8 GHz and has a high absolute accuracy. The radiometer measurements have been analysed with the statistical inversion method and the retrieved profiles have been compared with 28 simultaneous radiosoundings. The r.m.s. difference under clear-sky and cloudy conditions was, on these occasions, less than l-5degK up to 6km and 4km, respectively, less than OdegK up to 8 and 5-5 km, respectively, and less than 3-0degK up to 9 and 7-5 km, respectively. Methods to increase the profiling accuracy are discussed.read more
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Journal ArticleDOI
A Review of Ground-Based Remote Sensing of Temperature and Moisture by Passive Microwave Radiometers
Jan Askne,Ed R. Westwater +1 more
TL;DR: In this paper, the authors review some of the developments in this area, describe basic principles and results of field experiments, including the recent ONSAM-experiment, and summarize two years' performance of the NOAA Profiler.
Journal ArticleDOI
Nonlinear principal component analysis for the radiometric inversion of atmospheric profiles by using neural networks
F. Del Frate,Giovanni Schiavon +1 more
TL;DR: A new neural network algorithm for the inversion of radiometric data to retrieve atmospheric profiles of temperature and vapor has been developed and its effectiveness has been evaluated comparing its performance to that obtainable with more traditional linear techniques.
Journal ArticleDOI
A combined natural orthogonal functions/neural network technique for the radiometric estimation of atmospheric profiles
TL;DR: An inversion technique is presented for retrieving vertical profiles of atmospheric temperature and vapor from the brightness temperatures measured by a ground-based multichannel microwave radiometer and the surface measurements of temperature and relative humidity and has proven to be flexible, showing a good capability of exploiting information provided by other instruments.
Journal ArticleDOI
Simultaneous solution of emission transfer and thermal conductivity equations in the problems of atmosphere and subsurface radiothermometry
TL;DR: Remote sensing methods are proposed to measure the temperature and heat flux in the atmosphere and subsoil layer by radiometric measurements by derived expressions that relate the half-space temperature profile and the heat flux with the brightness temperature evolution.
Journal ArticleDOI
Stochastic theory of temperature distribution and thermal emission of half-space with random time-dependent surface temperature
TL;DR: On the basis of results of simultaneous solution of thermal emission transfer and thermal conductivity equations, the stochastic theory of temperature distribution and thermal radioemission of medium (half-space) has been developed.
References
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Journal ArticleDOI
Modeling attenuation and phase of radio waves in air at frequencies below 1000 GHz
TL;DR: In this article, an adequate spectroscopic data base for air consists of three terms: (1) resonance information for 29 H2O lines up to 1097 GHz and 44 O2 line up to 834 GHz in the form of intensity coefficients and center frequency for each line; (2) an empirical water vapor continuum spectrum; and (3) a liquid water attenuation term for haze and cloud conditions.
Journal ArticleDOI
Experimental Evaluation of Ground-Based Microwave Radiometric Sensing of Atmospheric Temperature and Water Vapor Profiles
TL;DR: In this paper, the authors compared atmospheric temperature and water vapor profiles derived from ground-based microwave radiometric measurements with concurrent raw-insonde profiles including both clear and cloudy cases.
Journal ArticleDOI
An Automatic Profiler of the Temperature, Wind and Humidity in the Troposphere.
D. C. Hogg,M. T. Decker,F. O. Guiraud,K. B. Earnshaw,D. A. Merritt,Ken Moran,W. B. Sweezy,R. G. Strauch,Ed R. Westwater,C. G. Little +9 more
TL;DR: In this paper, a remote sensing system for continuously profiling the troposphere is discussed; the prototype Profiler utilizes radio wavelengths, thereby achieving essentially all-weather operation, and it employs radiometric and Doppler radar technology.
Journal ArticleDOI
Measurements of atmospheric water vapor with microwave radiometry
TL;DR: In this article, a dual-channel, ground-based microwave radiometer, working at the frequencies 21.0 and 31.4 GHz, an infrared spectral hygrometer, and radiosondes have been used for comparative measurements of the integrated amount of precipitable water vapor in the atmosphere over a period with zenith water vapor contents varying between 6 and 26 mm.