Long March 2D • QUESS

Institute for Quantum Optics and Quantum Information from Vienna and Chinese Academy of Science (CAS) work simultaneously on quantum communication since 2001. After successful attempt of utilizing quantum properties of the laser's photons to send information to detector placed 16 kilometers away, it was clear that new era in communication started. Also due the limitations of using fiber optics, satellites will be necessary part of any serious quantum communication. Austrian scientists reached distance of 143 km and started to serious considering operation with ESA for designing satellite for further tests. Unfortunately ESA was not seriously interested in participating in such venture, so Institute for Quantum Optics and Quantum Information started to look for an ally in current competitor. CAS was naturally interested in cooperation, what gave the result in joining the project of China National Space Administration. Quantum Experiments satellite will be injected into the sun-synchronous orbit (altitude of 600 kilometers and inclination angle of 97.79°). It will remain on orbit for two years. Onboard instruments for research will consist: quantum key communicator, quantum entangled transmitter, quantum entangled photon source and quantum control processor. Designated launch vehicle is Long March 2D rocket. It consist two stages powered by liquid fueled engines. First stage is equipped with four YF-21C engines generating 2961.6 kN of thrust, second stage is powered by one central YF-24C (742.04 kN of thrust) and four YF-23C for stabilization (47.1 kN thrust each). Rocket length is 41 m, diameter is 3.35 m and weight is 232250 kg. Payload for SSO missions is up to 1300 kg.