Results 141 to 150 of about 2,770 (190)

Frequency Dependence of Microwave Radiometer Calibration

IEEE Geoscience and Remote Sensing Letters, 2009
A consequence of impedance mismatch for components located in the front-end of a microwave radiometer is that the radiometer's brightness temperature calibration becomes frequency-dependent. This dependence can limit the bandwidth over which a particular calibration is valid and place restrictions on local oscillator drift.
Mark A. Goodberlet, Ivan Popstefanija
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A Microwave Feedback Radiometer

IEEE Transactions on Aerospace and Electronic Systems, 1967
Two versions of a microwave feedback radiometer have been built and tested. One used an electromechanical feedback system; the other, an all-electronic system. The response of the servo loops proved to be fast enough and linear enough for almost any radiometer application. The rms noise fluctuation was the same as that of a Dicke radiometer.
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Validation of QuikSCAT Radiometer rain rates using the TRMM microwave radiometer

IEEE International Geoscience and Remote Sensing Symposium, 2003
The primary mission of the SeaWinds scatterometer on the QuikSCAT satellite is to infer surface wind vector from ocean backscatter measurements. Occasionally the backscatter measurements are contaminated by the presence of rain; therefore a reliable method of identifying rain is needed.
W. Linwood Jones, Khalil Ahmad, Jun-Dong Park, Takis Kasparis, Josko Zec   +4 more
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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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Development of an IEEE Standard for Calibration of Microwave Radiometers

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
In January 2019 a Project Authorization Request was submitted to the IEEE standards association with the title "Standard for Calibration of Microwave Radiometers in the 300 MHz to 1 THz Frequency Range for Geoscience Applications". An open committee is being assembled to draft this standard with the purpose of unifying and documenting calibration ...
Houtz, Derek, Blackwell, William, Camps Carmona, Adriano José, Emery, William, Gasiewski, Albin, Murk, Axel   +5 more
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Modeling the Visibility of Breast Malignancy by a Microwave Radiometer

IEEE Transactions on Biomedical Engineering, 2008
A breast tumor is visible by a passive microwave radiometer if it changes the radiometric output of a healthy breast to an extent that overcomes the radiometric resolution for the given sensing antenna and integration time. We modeled breast temperature by the standard Pennes equation using thermal parameters found in the literature for normal and ...
Fernando Bardati, Santina Iudicello
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Microwave Photonic Imaging Radiometer

2018 IEEE 15th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad), 2018
Nano-satellites are gaining in popularity due to their low cost and ease of deployment. Reaching orbit as secondary payload to larger spacecraft enables science grade missions at disruptively low cost. Such miniaturized platforms impose severe constraints on the size, weight, and power (SWaP) of the payload, however, making large antenna apertures ...
Thomas Dillon, . Andrew Wright, Daniel Mackrides, Shouyuan Shi, Janusz Murakowski, Peng Yao, Christopher Schuetz, Dennis Prather   +7 more
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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

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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