Results 131 to 140 of about 2,737 (182)

Fire Emissivity Detection by a Microwave Radiometer

IEEE Geoscience and Remote Sensing Letters, 2015
In this letter, the detectability of fire by a microwave radiometer is investigated. In order to understand the fire from a radiometric point of view, the parameters of fire emissivity had to be determined. Therefore, representative fire types were analyzed, and fire spot emissivity values have been derived from measured data.
Petr Dvorak, Milos Mazanek, Stanislav Zvanovec   +2 more
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On the sensitivity of fire detection by a microwave radiometer

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
In the paper the detectability of a fire by a microwave radiometer is investigated. Simulations of several scenarios and together with outdoor measurement were performed in order to confirm detectability of the fire of specific temperature distributions and dimensions. Various scenarios for fire sensing were numerically modeled and simulated.
Petr Dvorak, Stanislav Zvanovec
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Handheld microwave radiometer for education and outreach

Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005
This investigation features a low-cost (
Eric Chikando, Jeffrey R. Piepmeier, Anuradha Dujari, Carl White   +3 more
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SMAP Microwave Radiometer Calibration Revisit

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
The SMAP L-band microwave radiometer has completed its 3-year primary mission of measuring soil moisture and freeze/thaw state globally for quantifying the water and carbon cyclces. Instrument behavior is stable over the past 3 years and 9 months.
Jinzheng Peng, Sidharth Misra, Jeffrey Piepmeier, Simon Yueh, Emmanuel P. Dinnat, David M. Le Vine, Thomas Meissner, Priscilla N. Mohammed   +7 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

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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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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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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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
openaire   +1 more source