The XTAR-EUR is a communication satellite developed by Spain and the USA and in order to provide a secure channel over the Indian Ocean. It is operated by XTAR and Hisdesat Its launch short after the Spainsat is part of an effort to strengthen Spain's communication ties with allied countries around the globe, particularly in maters of national security (defense, disaster relief...).
The satellite is based on the Space Systems/Loral LS-1300 model. Consequently it is shaped like a box (5.4 x 2.9 x 2.2 m) with a total weight of 1412 kg (3631 kg at launch). The sides of the box contain two retractable solar panels (providing up to 3.6 kW of power) while the lower base (facing anti-radial direction) holds the communication module. This module operates on the X band (compatible with SATCOM systems employed by NATO) and consists of 12 X-band transponders of 72 MHz broadband each (reserving 4 for usage by the Spanish Ministry of Defense while offering the other 8 for potential partners) and a 2.4 diameter antenna. The system allows both RHCP and LHCP polarization while covering an area of 6,3095 m2 RCS (2 global beams from Eastern Brazil and the Atlantic Ocean, across all of Africa and the Middle East to as far east as Singapore, 1 beam across the Mediterranean Sea and 4 steerable beams with the possibility of overlapping). Additional systems provide 3-axis inflight stability.
Its orbit is geostationary (GEO) 29º East, around 35,800 km high (35,782.6 km of perigee and 35,803.7 km of apogee) with 0º of inclination, a period of 1,436.1 minutes and a semi-major axis of 42,164 km.
It is expected that the satellite will achieve an operational life exceeding 15 years until its planned decommission in 2023.