Results 141 to 150 of about 2,737 (182)

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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High Stability Microwave Radiometer

2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
The paper describes a new approach to the design of high stability microwave radiometer based on zero measurement method. The block diagram and operation algorithm of radiometer servo feedback are shown. Mathematical expressions for the evaluation of radiometric resolution and transfer characteristics are also presented.
Anton V. Ubaichin, Gregory G. Zhuk, Tilekbek Abdirasul Uulu   +2 more
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Microwave radiometer model simulation

International Journal of Remote Sensing, 1996
Abstract The relationship between the instrument engineering parameters and the geophysical parameters derived from a multi-frequency microwave radiometer is considered in this paper. A model is described that simulates the performance of this type of instrument and shows how the overall accuracy of the instrument is reflected in the geophysical ...
A. R. L. TATNALL, R. P. DONNELLY, J. E. CHARLTON   +2 more
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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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Dual Frequency Microwave Radiometer

12th Canadian Symposium on Remote Sensing Geoscience and Remote Sensing Symposium,, 2005
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.
null Xu Peiyuan, null Jin Peiyu, null Yao Zhuanliang, null Fang Zhenhuo, null Li Mingxiang, null Wang Zhenrong, null Zheng Jiahao   +6 more
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Advanced microwave precipitation radiometer

[Conference Digest] International Conference on Millimeter Wave and Far-Infrared Technology: ICMWFT '90, 2005
This paper describes the development and preliminary testing of an imaging passive microwave radiometer operating in the 10 to 85 GHz range specifically for precipitation retrieval and mesoscale storm system studies from a high altitude ER-2 aircraft. The instument is referred to as the Advanced Microwave Precipitation Radiometer (AMPR).
J.A. Galliano, R.H. Platt
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1420 MHz Microwave Radiometer

2006 16th International Crimean Microwave and Telecommunication Technology, 2006
1420 MHz microwave radiometer for remote sensing investigations is presented. Microwave radiometers for this purpose must be stable and sensitive in presence of strong electromagnetic interference.
D. Skulachev, A. Rukavicyn
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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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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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TRMM microwave radiometer algorithms

Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 2002
The TRMM Microwave Imager (TMI) is a modified SSM/I. Significant modifications include: the addition of 2 channels at 10.7 GHz (H and V polarization), a shift of the 22.235 GHz V channel to 21.4 GHz H, and increasing the cone angle from 45/spl deg/ to 49/spl deg/.
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