The paper presents the results of testing acceleration measurement data obtained by the accelerometer TAS3 onboard the spacecraft Foton M-3 during its uncontrolled orbital flight in September, 2007. Testing was carried out in two ways. The first way consisted in comparison of the low-frequency component in the measurement data with the acceleration calculated along the reconstruction of spacecraft attitude motion, the reconstruction being found by processing onboard measurements of the Earth magnetic field. The second way used the low-frequency component in the acceleration measurement data as a source information for the alternative reconstruction of the spacecraft attitude motion. Then both reconstructions were compared with each other. Both ways took into account the correction of the acceleration data for the influence of magnetic field and some other corrections. The results, obtained in both ways, confirm the sufficiently high accuracy of the accelerometer TAS3 in the frequency range 0.0002 – 0.002 Hz.

Theoretical and applied problems of mechanics