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DSLWP A1, A2 (Longjiang 1, 2)


DSLWP A1 and A2 (Discovering the Sky at Longest Wavelengths Pathfinder) or Longjiang 1 and 2 are two identical Chinese lunar microsatellites mission to perform ultra long-wave astronomical observations developped at the Harbin Institute of Technology (HIT).

The 45 kg micro-satellites are to be launched piggy-back with Queqiao (Chang'e 4 Relay, but are to insert them by themselves into a 200 km × 9000 km lunar orbits. The satellites are three-axis stabilized and carry a radio-astronomy payload featuring two linear polarization antennas mounted along and normal to the flight direction, which uses the moon as a shield to avoid radio emmanations from earth. Additionally, the satellites carry a King Abdulaziz City for Science and Technology (KACST) developed micro-optical camera and a amateur radio communications system.

The mission was be launched in May 2018 on a CZ-4C rocket about 6 month in advance of the Chang'e 4 lander and rover.

Longjiang 1 apparently apparently had issues on 21 May and remained initially in earth orbit.

Longjiang 2 successfully entered lunar orbit.

Nation: China
Type / Application: Lunar Orbiter
Operator: Harbin Institute of Technology
Contractors: Harbin Institute of Technology
Propulsion: ?
Power: Solar array, batteries
Mass: 45 kg
Orbit: 200 km × 9000 km lunar orbit
Satellite COSPAR Date LS Launch Vehicle Remarks
DSWLP A1 (Longjiang 1) 2018-045B 20.05.2018 Xi LC-3 CZ-4C with Queqiao (Chang'e 4 Relay), DSWLP A2
DSWLP A2 (Longjiang 2) 2018-045C 20.05.2018 Xi LC-3 CZ-4C with Queqiao (Chang'e 4 Relay), DSWLP A1