Results 121 to 130 of about 69,714 (169)

Brightness temperature ratios: analysis of typical behaviour

1995 International Geoscience and Remote Sensing Symposium, IGARSS '95. Quantitative Remote Sensing for Science and Applications, 2002
In the framework of the Olympus and Italsat satellites experiment, the Politecnico di Milano carried out a campaign aiming to measure brightness temperatures at different frequencies and to estimate some quantities, as water vapour (V), liquid water integrated content (L) and atmospheric attenuation, related to absorption phenomena of interest for ...
Bosisio AV, Capsoni C
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Venus: A Map of Its Brightness Temperature

Science, 1963
The 200-inch Hale telescope has been used to make high-resolution maps of the brightness temperature of Venus at wavelengths 8 to 14 microns. Resolution of about 1/30 of the disk reveals a general symmetry about the plane of the orbit, no day-night temperature effects, and a transient temperature anomaly in the southern hemisphere.
Murray, Bruce C., Wildey, Robert L., Westphal, James A.   +2 more
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Salinity retrieval from SMOS brightness temperatures

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
The neural network methodology is applied to the sea surface salinity retrieval from SMOS brightness temperatures. The direct model for simulating the brightness temperatures is the Small Slope Approximation model (SSA). Different cases are compared to analyze the retrieval quality.
S. Labroue, E. Obligis, C. Boone, S. Philipps   +3 more
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Brightness temperature for 166 radio sources

Research in Astronomy and Astrophysics, 2009
Using the database of the University of Michigan Radio Astronomy Observatory (UMRAO) at three radio frequencies (4.8, 8 and 14.5 GHz), we determined the short-term variability timescales for 166 radio sources. The timescales are 0.15 d (2007+777) to 176.17 d (0528–250) with an average timescale of Δ t obs = 17 . 1  16 .
Jun-Hui Fan, Yong Huang, Yu-Hai Yuan, Jiang-He Yang, Yi Liu, Jun Tao, Ying Gao, Tong-Xu Hua, Rui-Guang Lin, Jiang-Shui Zhang, Jing-Yi Zhang, Yi-Ping Qin   +11 more
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Brightness Temperature over the Indian Subcontinent

Journal of the Geological Society of India, 2000
Abstract Special Sensor Microwave/Imager (SSM/I) onboard the Defence Meteorological Satellite measures brightness temperature. Microwave remote sensing sensors have the capabilities of sensing the Earth surface through cloud cover day and night. Using these sensors, day to day monitoring of Earth, ocean and snow covered regions can be
Nrusingha C. Mishra, Prasanjit Dash, Ramesh P. Singh   +2 more
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HIRAD Brightness Temperature Image Geolocation Validation

IEEE Geoscience and Remote Sensing Letters, 2017
The Hurricane Imaging Radiometer (HIRAD) is an airborne microwave radiometer developed to provide wide-swath hurricane surface wind speed and rain rate imagery for scientific research. This letter presents a geometric evaluation of the brightness temperature (Tb) images produced by HIRAD for high-contrast land/water targets.
Saleem Sahawneh, W. Linwood Jones, Sayak K. Biswas, Daniel Cecil   +3 more
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Effect of Color Temperature on Apparent Brightness

Journal of the Optical Society of America, 1954
Two screens viewed side by side were illuminated by radiations approximating those of blackbodies of different color temperatures and matched in brightness at photopic levels. A group of 73 observers found that less light of the higher color temperature was needed to produce equality of brightness than would be required by the CIE normal observer.
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High Brightness Temperatures in IDV Sources

Chinese Journal of Astronomy and Astrophysics, 2006
High brightness temperatures are a characteristic feature of IntraDay Variability (IDV) of extragalactic radio sources. Recent studies of the polarization properties of some IDV sources (e.g., 1150+812, PKS 0405-385 and 0716+714) have shown that these sources harbor several compact IDV components with angular sizes of ∼10-30µas and very high ...
Shan-Jie Qian, T. P Krichbaum, A Witzel, J. A Zensus, Xi-Zhen Zhang   +4 more
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Average brightness temperature of antenna aperture

Journal of Electronics (China), 1997
This paper presented an idea for the average brightness temperature of lossless antenna aperture, gave its expression for matched and dismatched noise source. This expression showed that the average brightness temperature of antenna aperture related with three factors: the noise temperature of noise source, the reflection coefficient of noise source ...
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Brightness Temperature from Very Lossy Medium

2018 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), 2018
The brightness temperature from moistured soil with a flat surface is computed by defining near-field bistatic transmission coefficients (BTCs) and modifying the Planck's law for lossy medium. The efficacy of the proposed methods are verified by simulations and comparison with literatures.
Zhi-Hong Lai, Jean-Fu Kiang
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