Pre-Flight calculation of the orbital parameters of a small satellite

The problem of pre-flight calculation the orbital parameters first nanosatellite Belarusian State University CubeBel-1 before launching from Jiuquan Satellite Launch Center in China has been solved. passes over ground station were predicted based on perturbed circular motion model. initial TLE file was generated and published Internet. This allowed dozens radio amateurs 5 continents successfully to receive telemetry day after launch October 29, 2018 at 00:43:13.576 UTC, decode telemetry. obtained compared with calculations SGP 4 It is shown that absolute errors predicting elevation azimuth did not exceed 2o 3o, respectively, error Doppler frequency shift signals 350 Hz, which, appropriate receiver settings, sufficient for successful reception satellite their decoding.