Results 271 to 280 of about 3,908,495 (300)

Brightness, Emittance and Temperature

1988
During the past fifty years there has been a spectacular growth in the number of applications for particle beams. The various practical requirements scan orders of magnitude in energy, current, and particle mass, from electrons to uranium ions. The behaviour of some of these beams, especially when self-fields are large and interaction with walls or ...
openaire   +1 more source

Colour Temperature and Brightness of Moonlight

Nature, 1923
OUR more complete knowledge of full or black-body radiation embodied in Planck's law makes it possible to speak of the temperature of radiation as well as the temperature of radiating bodies. Thus, the temperature of any visible radiation is the temperature to which a black body must be raised to emit light as nearly as possible of the same integral ...
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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 ...
openaire   +1 more source

Temperature dependence of the electroluminescence brightness

Soviet Physics Journal, 1969
V. L. Rabotkin, M. B. Kotlyarevskii, L. S. Kazakova   +2 more
openaire   +1 more source

A Wildfire Detection Algorithm Based on the Dynamic Brightness Temperature Threshold

Forests, 2023
Ming-Yang Wang, Xianjie Wang
exaly  

The Cygnus Radio Loop: Temperature and Brightness

2009
Observations of the continuum radio emission at 1420, 820 and 408 MHz enabled estimations of the brightness of the Cygnus Loop supernova remnant (SNR). We calculated the mean brightness temperatures and surface brightnesses of this loop at the three frequencies.
Borka Jovanović, Vesna, Urosevic, D.
openaire   +1 more source