Results 151 to 160 of about 2,689 (195)

An imaging microwave radiometer†

International Journal of Remote Sensing, 1983
Abstract The phase A study of an imaging microwave radiometer (IMR) has been completed, for ESA, by a team of contractors led by BAe. The instrument design which was established during this study is described in this paper. The IMR would be able to measure the intensity of radiation in the microwave band at a number of specific frequencies.
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An electronically switched microwave radiometer

Journal of Physics D: Applied Physics, 1973
An 11·5 GHz microwave radiometer is described in which periodic noise variations up to 1 kHz were resolved by a sampling process using PIN diode switching. A sensitivity of 0·04 dB (100 K) was recorded in checking the system with the noise power emanating from a current-modulated plasma column.
C J Burkley, C P Downing, M C Sexton
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MetOp Second Generation Microwave radiometers

2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad), 2012
This paper presents an overview of three Microwave radiometers currently studied for MetOp Second Generation by European Space Agency (ESA). The radiometers are Microwave Sounder (MWS), Microwave Imager (MWI) and Ice Cloud Imager (ICI).
Ville Kangas, Salvatore D'Addio, Maurizio Betto, Hubert Barre, Graeme Mason   +4 more
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Temperature resolution of microwave radiometers

Radiophysics and Quantum Electronics, 1997
We consider the quantum limits of the radiometer sensitivity in power and spectral density measurements of the radio emission. It is shown that taking into account zero-point field fluctuations makes it possible to resolve some paradoxes in the theory of an ideal radiometer.
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The ERS-1 microwave radiometer

International Journal of Remote Sensing, 1994
Abstract The microwave radiometer on board ERS-1 developed at CRPE has two channels at 23·8 and 36·5 GHz. It is a nadir pointing sensor, aimed at the correction of the altimeter tropospheric path delay. It also provides the precipitable water and cloud liquid water over oceans along the satellite track. However, the measured brightness temperatures can
L. EYMARD, A. LE CORNEC, L. TABARY
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Dual frequency microwave radiometer

2010
A dual-frequency microwave radiometer has been developed to remotely sense water vapor and liquid in the troposphere. An optimum frequency pair, 20.60 and 31.65 GHz, is adopted. The system consists of two Dicke radiometers (one at each frequency), both of which are controlled by a microcomputer system and mounted on a rotatable pedestal.
Yao, Zhuanliang, Zheng, Jiahao, Jin, Peiyu, Xu, Peiyuan, Zhao, Conglong, Fang, Zhenhuo, Li, MingXiang, Wang, Zhenrong, Lin, Bin   +8 more
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Microwave vegetation indices derived from satellite microwave radiometers

SPIE Proceedings, 2008
Vegetation indices are valuable in many fields of geosciences. Conventional, visible-near infrared, indices are often limited by the effects of atmosphere, background soil conditions, and saturation at high levels of vegetation. In this study, the theoretical basis for a new type of passive microwave vegetation indices (MVIs) based on data from the ...
T. J. Jackson, J. C. Shi, J. Tao
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Microwave vegetation indexes derived from satellite microwave radiometers

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
Major uncertainties in deriving vegetation indices from satellite measurements are the effects of atmosphere and background soil conditions. Through numerical simulations by surface emission model - Advanced Integral Equation Model (AIEM), we found that bare surface emissivities at different frequencies can be well characterized by a linear function ...
null Jiancheng Shi, T. Jackson, null Jing Tao, null Jingyang Du, R. Bindlish   +4 more
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Antenna systems for microwave radiometers

Nanotechnology : the development , application - XXI Century
The paper provides an overview of the antenna systems used for microwave radiometers. Due to the development of precision agriculture, the use of radiometers for monitoring soil moisture relief is becoming relevant. Microminiaturization of antenna systems expands the possibility of using radiometers using unmanned aerial vehicles and ground-based ...
A.G. Gudkov, V.F. Los, I.A. Sidorov, I.O. Porokhov   +3 more
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
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