TY - GEN
T1 - Initial comparisons of forecast attenuation and beacon measurements at 20 and 40 GHz
AU - Hodges, Duncan D.
AU - Watson, Robert J.
PY - 2006/10
Y1 - 2006/10
N2 - The use of frequencies above 20 GHz for Earth-Space communication has many advantages, primarily substantially increased capacity. Unfortunately at these frequencies the attenuating effects of the troposphere become very large; clouds, rain and atmospheric gases all contribute significant attenuation. The Italsat propagation experiment demonstrated the large fade margins that would be required to achieve a high availability network. At the University of Bath we have developed a technique that is able to forecast link fades (in terms of cloud attenuation, rain attenuation and the attenuation from water vapor and gaseous oxygen and an estimate of the scintillation variance) a number of days into the future. This technique exploits concepts from numerical weather prediction (NWP) systems in order to characterize the meteorological environment. A propagation model is then applied to forecast the fade level.
AB - The use of frequencies above 20 GHz for Earth-Space communication has many advantages, primarily substantially increased capacity. Unfortunately at these frequencies the attenuating effects of the troposphere become very large; clouds, rain and atmospheric gases all contribute significant attenuation. The Italsat propagation experiment demonstrated the large fade margins that would be required to achieve a high availability network. At the University of Bath we have developed a technique that is able to forecast link fades (in terms of cloud attenuation, rain attenuation and the attenuation from water vapor and gaseous oxygen and an estimate of the scintillation variance) a number of days into the future. This technique exploits concepts from numerical weather prediction (NWP) systems in order to characterize the meteorological environment. A propagation model is then applied to forecast the fade level.
UR - http://www.scopus.com/inward/record.url?scp=33847344620&partnerID=8YFLogxK
U2 - 10.1109/eucap.2006.4584793
DO - 10.1109/eucap.2006.4584793
M3 - Chapter in a published conference proceeding
AN - SCOPUS:33847344620
SN - 9789290929376
T3 - European Space Agency, (Special Publication) ESA SP
BT - Proceedings of The European Conference on Antennas and Propagation
PB - European Space Agency
T2 - European Conference on Antennas and Propagation: EuCAP 2006
Y2 - 6 November 2006 through 10 November 2006
ER -