Results 261 to 270 of about 45,693 (310)

Radiometer equation for noise comparison radiometers

IEEE Transactions on Instrumentation and Measurement, 1995
A complete radiometer equation is derived and used to develop better corrections and uncertainty estimates. I believe it to be the first thorough analysis of radiometers with unisolated front ends. We show that a corrected unisolated radiometer can have an accuracy similar to that of a well-isolated radiometer. The radiometer error is insignificant for
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Transformation of a net radiometer into a hemispherical radiometer

Agricultural Meteorology, 1971
A Fritschen-type net radiometer was converted to a hemispherical radiometer by the spray application of black paint to the lower polyethylene dome and the utilization of a second polyethylene layer to secure three fine thermocouples in close proximity to the inwardly radiating paint surface.
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The selection of a biothermal radiometer

Journal of Scientific Instruments, 1967
Infra-red radiometers are being used in studies in the life sciences without proper consideration of their principles of operation, or of the physical basis of the measurements made with them. There are some aspects of biothermal radiometry which should be borne in mind when selecting and using a biothermal radiometer.
D, Mitchell, C H, Wyndham, T, Hodgson
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Undersea compound radiometer

Applied Optics, 1992
We have built a simple, undersea radiometer that measures ten integral moments of the radiance as functions of depth in natural waters. From these data it is possible to calculate nine spherical moments of the scattering function, provided that this function varies slowly in the horizontal planes (i.e., the water is fairly stratified).
W, Doss, W, Wells
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The stability test of radiometer

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017
Either soil moisture or ocean salinity plays important role in globe water cycle. They are key parameters for monitoring the globe climate change [1]. Aperture Synthesis Microwave Imaging Radiometer will measure global sea surface salinity with 50-km spatial resolution, and the average monthly salinity accuracy aims at 0.1 psu (parts per thousand ...
Guangnan Song, Xiaojiao Yang, Yinan Li, Pengfei Li, Hailiang Lu   +4 more
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Simplifications in the transformation of net radiometers into hemispherical radiometers

Agricultural Meteorology, 1972
Abstract In a recent paper in this journal (Idso, 1971) I described a technique for transforming polyethylene-shielded net radiometers into hemispherical radiometers. It consisted essentially of constructing a second set of domes, sandwiching three fine thermocouples between the bottom pair, applying a spray application of black and then white paint ...
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The Radiometer and Its Lessons

Nature, 1877
PROF. OSBORNE REYNOLDS (vol. xviii. p. 121) appears to have done himself less than justice in the extracts he has sent you from his earlier papers, as representing his published views on the action of residual gas in radiometers. For the extracts do not suffice to constitute an explanation of this action, whereas the papers from which he makes the ...
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Active Cavity Radiometer

Applied Optics, 1973
The active cavity radiometer (ACR) is a pyrheliometer that accurately defines the absolute radiation scale. The physics of the pyrheliometric method and the ACR approach to this method are presented in detail. A mathematical abstraction of the method is generated through a quasi-equilibrium analysis of the power balance of the ACR's cavity detector. An
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Portable microwave radiometer for wearable devices

Sensors and Actuators A: Physical, 2021
Sergey Vesnin, Mikhail Sedankin, Igor Sidorov   +2 more
exaly  

RADIOMETER COPENHAGEN

Analytical Chemistry, 1983
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