  The in-orbit results and lessons learned of the first Finnish satellite
Aalto-1 are briefly presented in this paper. Aalto-1, a three-unit CubeSat
which was launched in June 2017, performed AaSI (Aalto Spectral Imager),
Radiation Monitor (RADMON), and Electrostatic Plasma Brake (EPB) missions. The
satellite partly fulfilled its mission objectives and allowed to either perform
or attempt the experiments. Although attitude control was partially functional,
AaSI and RADMON were able to acquire valuable measurements. EPB was
successfully commissioned but the tether deployment was not successful.
