Results 271 to 280 of about 4,192,467 (303)

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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Lunar Brightness Temperature Measurement with CHIME

2021
Half a century after measurement of the lunar brightness temperature for preparations of the moon landing, Canadian Hydrogen Intensity Mapping Experiment (CHIME) provides improved instrumentation and a more sophisticated method for the same measurement.
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Temperatures on the Bright and Dark Sides of Venus

Publications of the Astronomical Society of the Pacific, 1955
scope with vacuum thermocouples in full daylight when the planet was near the meridian. Three different thermocouples were used. Couple No. 36, made with octagonal receivers 0.8 mm in diameter, was used most frequently.4 No. 40, made for lunar investigations, was partially covered with a silver shield which exposed only one receiver, 0.45 mm square. No.
Edison Pettit, Seth B. Nicholson
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The brightness temperature of Saturn at decimeter wavelengths

Icarus, 1973
Abstract Observations of the planet Saturn at wavelengths of 49.5 and 94.3 em are reported. The equivalent disk brightness temperatures were found to be 400 ± 65°K and 540 ± 110°K, respectively. It is suggested that the enhanced portion of the spectrum of the disk brightness temperature favours the idea that the observed long wavelength radiation ...
M.J. Yerbury, J.J. Condon, D.L. Jauncey
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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 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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A Note on Brightness Temperature at Millimeter Wavelengths

IEEE Transactions on Geoscience Electronics, 1975
The first-order correction to the approximate proportionality between the brightness temperature and the specific intensity of radiation which is usually assumed to hold in the near earth environment at microwave frequencies is examined. Corrections as large as 7°K in the vicinity of 300 GHz are shown to be required.
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Temperature dependence of the electroluminescence brightness

Soviet Physics Journal, 1969
V. L. Rabotkin, M. B. Kotlyarevskii, L. S. Kazakova   +2 more
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True Temperature and Brightness Temperature

Journal of the Optical Society of America, 1961
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SMOS' brightness temperatures statistical characterization

2013
ESA Living Planet Symposium 28 June – 2 July 2010 Bergen ...
Talone, Marco, Gourrion, Jérôme, González Gambau, Verónica, Sabia, Roberto, Camps, Adriano, Corbella, Ignasi, Turiel, Antonio, Font, Jordi   +7 more
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