Results 101 to 110 of about 333,204 (200)
Gravity referenced elevation encoder development [PDF]
Recent progress in the development of a gravity-sensor-based instrument for determining the elevation angle of DSN antennas is described. The benefits of such a system include the capability to locate the Gravity Referenced Elevation Encoder (GREE ...
Goddard, R. E.
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Low elevation angle KU-band satellite measurements at Austin, Texas [PDF]
At low elevation angles, the propagation of satellite signals is affected by precipitation as well as by inhomogeneties of the refractive index. Whereas precipitation causes fades for relatively small percentages of time, the refractive index variability
Ranganathan, Murali +2 more
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Beam waveguides in the Deep Space Network [PDF]
A beam waveguide is a mechanism for guiding electromagnetic radiation from one part of an antenna to another through a series of reflectors. Appropriate placement of reflectors on an antenna allows a beam to be guided around the elevation axis and/or ...
Clauss, R. C., Smith, J. G.
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Propagation measurements for an Australian land mobile satellite system [PDF]
Measurements of attenuation statistics using a helicopter and an instrumented van are discussed. Results are given for two different tree densities, for elevation angles of 30, 45 and 60 degrees and for frequencies of 893, 1550 and 2660 MHz.
Bundrock, Anthony J., Harvey, Robert
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Evaluation of the Phantom Image Effect for Phantom Images [PDF]
This paper introduces the author’s recent research on the elevation effect perceived with horizontal phantom images. Early research in stereophony suggests that a phantom centre image produced by two loudspeakers symmetrically placed from the listener ...
Lee, Hyunkook
core
Elevation angle measurements during a local contest
RadCom, 2005 In Holland two national contests are held on a yearly basis. One is the PACC contest in February, aimed at contacts with other countries. The other is the PA Trophy contest, where only traffic between Dutch stations is allowed on the 75 meters and 40 meters bands.
van Maanen, E. +3 more
openaire +1 more source
Elevation angle measurements during a local contest
QST, 2006 In Holland a couple of national contests are held on a yearly basis. One contest drawing a high participation, the PA Trophy contest, is held in November. In this contest only traffic between Dutch stations is allowed on the 75 meters and 40 meters bands.
Witvliet, Ben A., van Maanen, E.
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Inclusion of Solar Elevation Angle in Land Surface Albedo Parameterization Over Bare Soil Surface. [PDF]
J Adv Model Earth Syst, 2017 Zheng Z +9 more
europepmc +1 more source
The use of sun elevation angle for stereogrammetric boreal forest height in open canopies. [PDF]
Remote Sens Environ, 2017 Montesano PM +5 more
europepmc +1 more source
SAR antenna calibration techniques [PDF]
Calibration of SAR antennas requires a measurement of gain, elevation and azimuth pattern shape, boresight error, cross-polarization levels, and phase vs. angle and frequency. For spaceborne SAR antennas of SEASAT size operating at C-band or higher, some
Carver, K. R., Newell, A. C.
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