Browsing Articles by Author "Åsen, Walther"
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Comparison of Measurements with Prediction Methods for Propagation by diffraction at88 - 108 MHz
Åsen, Walther (2004)Three methods for predicting attenuation due to diffraction are tested against a large database of 115 614 measurement points, representing 115 614 different path profiles of 100-m horizontal resolution, and vertical root ... -
A comparison of rain attenuation and drop size distributionsmeasured in Chilbolton and Singapore
Åsen, Walther; Gibbins, Chris (2002)Attenuation of radio waves caused by precipitation, especially in the form of rain, is considered to be the limiting factor for new communication systems that will exploit the radio wave spectrum at frequencies higher than ... -
Improved correction methods for measuring altitude by Radar and Barometer
Åsen, Walther (2018)Geometric altitude of air targets may be found from radar or barometric measurement. However, radar rays are affected by changes in refractive index gradients which result in non-normal bending of rays. Similarly, precision ... -
A Novel Method of Predicting Site DependentSpecific Rain Attentuation of Millimeter Radio Waves
Åsen, Walther; Tjelta, Terje (2003)There is a need for validation and improvement of propagation prediction methods for the safe design and operation of millimeter radio communication systems. At this frequency range, propagation related degradation is ...