Preliminary Results of the THOR7 Propagation Experiment in the North Pole Region
Résumé
A propagation experiment funded by ESA with support from CNES has been deployed in Svalbard (Northern Norway, 80° latitude North) in order to study propagation impairments at Ka-band caused by the troposphere at high latitudes and low elevation angles in representative conditions for GEO satcoms systems in the Artic region. In this context, a NASA Glenn Research Centre beacon receiver, operated by KSAT in Norway, measures the signal from the THOR7 satellite at a 2.65° elevation angle since March 2016. ONERA processes and analyses the data since the beginning of the experiment. At this stage 2 years of propagation data from the satellite have been gathered. An Atmospheric Numerical Simulator relying on the high resolution meteorological model (WRF-ARW) is used to generate 3D states of the atmosphere during a concurrent period to the experiment at high spatial & temporal resolutions. Propagation calculations based upon those outputs are then conducted to derive simulated attenuation time series between the beacon receiver and THOR7. Results show a fairly good statistical agreement between the measured and simulated attenuation time series whereas the simulated statistics seem to underestimate the overall attenuation for all percentages of time.
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