chapter5_bul114继电器参考资料.pdf

Applications The first Envisat image transmitted by Artemis on 13 March 2003, showing Archangel in Northern Russia 50 esa bulletin 114 - may 2003 Artemis Gets to Work! Artemis Finally Gets to Work ! Gotthard Oppenhäuser Aneurin G. Bird After a remarkable recovery operation lasting 18 months, ESA’s latest Artemis Programme Office, telecommunications satellite Artemis finally reached its assigned position in ESA Directorate of Applications, geostationary orbit on 31 January. Launched on problematic Ariane-5 flight 142 on ESTEC, Noordwijk, The Netherlands 12 July 2001, which experienced a malfunction in its upper stage, the satellite was injected into an abnormal, low-energy orbit with an apogee height only half that of the standard geostationary transfer orbit (GTO). For any conventional communications satellite, this would have resulted in the total loss of the mission. Thanks, however, to the combination of technologies onboard Artemis and the innovative control procedures