Results 261 to 270 of about 4,121,317 (291)

Conversion issues between microwave radiance and brightness temperature

Journal of Quantitative Spectroscopy and Radiative Transfer, 2008
Abstract Microwave radiances are usually converted into brightness temperatures for data assimilation and retrievals. The Rayleigh–Jeans approximation has been believed to be a good approximation for the conversion at low frequencies, but inaccurate at high frequencies.
Quanhua Liu, Fuzhong Weng, Y. Han
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Use of microwave brightness temperatures with a general circulation model

Journal of Geophysical Research: Atmospheres, 1995
Brightness temperature maps from global monthly mean general circulation model (GCM) atmospheric and surface fields are calculated with a new microwave radiative transfer postprocessor. This microwave radiative transfer model uses fields from the 4° by 5° Goddard Institute for Space Studies (GISS) GCM Model II and subsequent developmental versions of ...
Kathryn Pierce Shah, David Rind
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A model function for ocean microwave brightness temperatures

Journal of Geophysical Research: Oceans, 1983
We derive a relatively simple, yet accurate, relationship between the microwave brightness temperature of the ocean and conventional oceanographic and meteorological parameters. To begin with, the brightness temperature of the ocean and the intervening atmosphere is expressed in terms of integrals for the radiative scattering and emission from the sea ...
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An improved method for microwave radiant brightness temperature imaging

2015 Asia-Pacific Microwave Conference (APMC), 2015
The ray tracing method based on space meshing is employed for microwave radiation imaging in this paper. With the scene models and the tracing codes, the correctness and the effectiveness of the space meshing ray tracing method is verified by comparing the reconstructive images and the actual output ones for the radiometer imaging problems in three ...
Chuan Yin, Ju Qian, Ming Zhang, Yaming Bo   +3 more
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Microwave brightness temperature prediction of plane targets by a neural network

IEEE Transactions on Geoscience and Remote Sensing, 2003
Studies on microwave radiation of many targets, such as air, ocean, ice, snow, vegetation, rock, sand, and so on, lead to the radiometric models of the targets. The model uses one or more formulas to represent the radiation of one target. A neural network (NN) is introduced to represent the antenna temperature (AT) or brightness temperature (BT) of the
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Proposed Development of a National Standard for Microwave Brightness Temperature

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
We review the advantages of a national standard for microwave brightness temperature and outline our proposed approach toward developing such a standard. The proposal is a combined standard that would comprise both a standard radiometer, traceable to primary noise standards, and a fully characterized standard target.
J. Randa, A. Cox, D. Walker
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Atmospheric correction of passive microwave brightness temperature on the estimation of snow depth

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
We discussed atmospheric correction of passive microwave over China in the snow covered area. SSM/I brightness temperature, radiosonde observation database and MODIS water vapor product (MOD05) were used to estimate the atmospheric influence. The traditional gradient SWE algorithm before and after the atmospheric correction was compared, and results ...
Lijuan Shi, Yubao Qiu, Juha Lemmetyinen, Jiancheng Shi 0001   +3 more
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Intercalibration of Advanced Microwave Scanning Radiometer-2 (AMSR2) Brightness Temperature

IEEE Transactions on Geoscience and Remote Sensing, 2015
Here, we describe the characteristics of brightness temperature (Tb) measured by the Advanced Microwave Scanning Radiometer-2 (AMSR2) onboard the Global Change Observation Mission 1st-Water (GCOM-W1). This mission aims to achieve long-term global monitoring of Earth using two polar-orbiting satellite observation systems with three consecutive ...
Arata Okuyama, Keiji Imaoka
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Brightness Temperature Calculation and Uncertainty Propagation for Conical Microwave Blackbody Targets

IEEE Transactions on Geoscience and Remote Sensing, 2018
We discuss the analytical derivation of the absolute brightness temperature uncertainty of a hollow conical blackbody source for radiometer calibration. We introduce a Monte Carlo uncertainty propagation analysis method to quantify uncertainty contributions from nonideal emissivity, physical temperature, and antenna pattern, which are the three major ...
Derek A. Houtz, William J. Emery, Dazhen Gu, David K. Walker   +3 more
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The ocean surface wind direction signal in passive microwave brightness temperatures

IEEE International Geoscience and Remote Sensing Symposium, 2003
We analyze the wind direction signal for vertically (v) and horizontally (h) polarized microwave radiation at 37 GHz, 19 GHz and 11 GHz and an Earth incidence angle of 53 deg. We use brightness temperatures from SSM/I and TMI and wind vectors from buoys and the QUIKSCAT scatterometer.
Thomas Meissner, Frank J. Wentz
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