Issue 10

Li Dereng: China is moving to an integrated PNTRC concept

In a 7 November 2020 interview, Li Dereng described China’s Gaofen capabilities and a three-step integrated PNTRC architecture for increasingly frequent regional and global coverage.

– 7 November 2020: Interview with Li Dereng, Professor at Chinese Academy of Sciences and Engineering.

– Gaofen satellites: “a total of 14 satellites…are what we now call high-resolution earth observation satellites, of which 1-7 are civilian satellites, and 8-14 are military satellites.”

— “These 14 stars can be said to be “military-civilian integration””

– “The spatial resolution of the optical satellite reaches 0.1m~0.5m”

— “The best satellite in the U.S. is Keyhole. Its resolution is 0.1m. Our Gaofen 11 can also meet this standard.”

– “The resolution of the radar satellite reaches 0.5m~1m”

– “The resolution of the two GEO satellites is 50m and 15m respectively”

Li Dereng: China is moving to an integrated PNTRC concept (Position, Navigation, Timing, Remote sensing, Communications), in three steps: first, a local coverage of the Chinese coasts with 20 LEO sats and three GEO relays, to get a revisit every 15 minutes. Then, a regional coverage of China and the Belt & Road countries with 50 optical, 50 radar and 150 communication satellites. Finally, a global coverage every 5 minutes, with 200 EO and 300 comms satellites.

Integrated PNTRC coverage concept described by Li Dereng.