Also designated Beidou-49, the satellite is part of the IGSO (Inclined) component of the 3rd phase of the Chinese Beidou (Compass) satellite navigation system, using both geostationary satellites and satellites in intermediate orbits. The satellites are based on the DFH-3B Bus. This bus has a payload increased to 450 kg and payload power to 4,000 W. They feature a phased array antenna for navigation signals and a laser retroreflector and additionally deployable S/L-band and C-band antennas. With a launch mass of 4,600 kg, spacecraft dimensions are noted to be 2.25 by 1.0 by 1.22 meters.