Attitude dynamics analysis of the first Russian nanosatellite TNS-0 using flight test results

The first Russian nanosatellite TNS-0 was manually launched from the International space station in March, 2005. The satellite was equipped with the passive magnetic attitude control system. To obtain the information on satellite attitude motion a several elementary sun sensors were installed. A few download sessions with the satellite were executed. Sun sensor measurements during certain time intervals were transmitted through GLOBALSTAR network. In the paper parameters of attitude motion are determined using the measurements. Analysis of the measurements showed that the satellite has probably achieved the following motion. The satellite rotates fast; the magnet direction averaged over precession period tracks the intensity vector of the geomagnetic field; the angle between the magnet direction and the intensity vector of the geomagnetic field is not small. Analytical research of the attitude motion is carried out.