Kiku 2

ETS 2 (Engineering Test Satellite 2) or Kiku 2 was a Japanese engineering technology satellite launched to acquire technologies to launch, track, and control geostationary satellites. It carried out a propagation experiment of millimeter and quasi-millimeter waves. Its weight at launch was 245 kg and was cylindrical, 191 cm high including the antenna, with a diameter of 141 cm. Its expected life was as least 6 months.