|Diameter||4.2 m||Defined by the solar array|
|Total mass at launch||1912 kg||Fuel mass = 385 kg at launch; He mass = 7.7 kg|
|Electrical power demand (avg)||1300 W||Instrument part: 685 W (Begining of Life), 780 W (End of Life)|
|Operational lifetime||18 months||Plus a possible extension of one year|
|Spin rate||1 rpm||0.6 arcmin/sec (changes due to manoeuvers)|
|Stability during inertial pointing rpm/h|
|Max angle of spin axis to Sun||10||To maintain the payload in the shade. Default angle is 7 5.|
|Max angle of spin axis to Earth||15||To allow communication to Earth|
|Angle between spin axis and telescope boresight||85||Max extent of FOV 8|
|On-board data storage capacity||32 Gbit||Two redundant units (only one is operational at any time)|
|Data transmission rate to ground (max)||1.5 Mbps||Within 15 of Earth, using a 35 m ground antenna|
|Daily contact period||3 h||The effective real-time science data acquisition bandwidth is 130 kbps.|
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