In September of 2017, the latest version of the Quantum Satellite Communication Simulator (QSCS) was released,
which was developed directly to analyze satellite-based quantum communication channels by various scenarios, taking into account the atmospheric factors of the Earth.
This is a freeware Java application, which was developed by the Department of Networked Systems and Services, Budapest University of Technology and Economics and the Institute of Informatics and Economics, University of Sopron.
The aim of the silumator is the determination of QBER in different channel types (Earth-space, space-space, space-Earth), examination the used formulas, and simulation a quantum channel based network.
The program has two main modes: Sensitivity Analysis and Simulation. In the Sensitivity Analysis the application can use the following formulas: beam widening in vacuum, dynamic loss, total scattering, quantum efficiency of the detector,
QBER of the following protocols: BB84, B92, S09, Gisin.
In the Simulation mode the application can calculate the performance characteristics of the Earth-space, space-Earth, space-space channels by the following parameters:
aperture diameter, wavelength, targeting angular error, mirror diameter, probability of polarization measurement error, quantum efficiency of the detector (expose, flux, detector conversion efficiency, detector area, readout noise variance,
dark noise variance), mean photon number of the signal, number of detectors, total noise, efficiency of quantum operations by the receiver, frequency of laser firing, season, climate, weather, turbulence, height above sea level, zenith angle.