This paper presents analytical results of atmospheric turbulence for optical communication links between a geo-stationary earth orbit (GEO) satellite and an optical ground station (OGS) by using a differential image motion monitor (DIMM) method. Optical satellite communications are expected to increase the transmission capacity of satellite-ground communication links. However, atmospheric turbulence degrades the communication performance of satellite-ground optical links. In order to practically utilize satellite-ground optical links, measurement data of atmospheric turbulence are helpful for the optical system design for OGSs. Therefore, we have conducted satellite-ground optical link experiments between the Laser Utilizing Communication System (LUCAS) onboard the optical data relay GEO satellite and an OGS in Okinawa. In this paper, we report preliminary analytical results of the Fried parameter measured by using the DIMM method and provide statistical results of the parameter.
In this paper, we present first results in the experimental demonstration campaign of optical feeder link conducted in November 2021, by using the Laser Utilizing Communication System (LUCAS) onboard the optical data relay GEO satellite. This campaign has been worked under the collaboration for both the National Institute of Information and Communications Technology (NICT) and the Japan Aerospace Exploration Agency (JAXA). In our experiment, we utilize the optical ground station with 1 meter telescope, which is installed in the Okinawa Electromagnetic Technology Center of NICT. This paper mainly discuss received optical power, acquisition and tracking performance, bit error rate performance of the downlink and received optical power of the uplink in an optical feeder link.
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