China's Tianwen-1 mission, featuring an orbiter and rover, successfully entered Mars orbit on February 10. To capture the maximum data from this historic endeavor, authorities constructed a massive dedicated antenna.
The mission targets a landing in May within Utopia Planitia, a vast impact basin. Success would mark China's first Mars landing—following three lunar achievements—and make it only the second nation after the U.S. to softly land on the Red Planet.
While awaiting the rover deployment, the orbiter begins transmitting data, primarily mapping water ice distribution in Martian subsurface and detailing the planet's geological structure.
Key instruments include medium-resolution (MoRIC) and high-resolution (HiRIC) cameras, a Mars orbital subsurface ice and radar (MOSIR), infrared spectrometer (MMS), magnetometer (MOMAG), and particle detectors (MINPA and MEPA).
Relaying this data across 400 million kilometers poses significant challenges.
China's response: a 70-meter diameter antenna in Tianjin, northern China. Under construction since October 2018, this 2,700-ton parabolic dish was officially transferred to the National Astronomical Observatory of China (NAOC) on February 3. It's primed for Tianwen-1 and future deep-space missions.
“The antenna is designed to receive faint signals from Mars exploration over 400 million kilometers,” explains Li Chunlai, deputy chief designer of China's Mars project. “Signal energy attenuates with distance, requiring a large surface area to gather sufficient power,” he adds.
The China National Space Administration (CNSA) recently shortlisted ten names for the rover, drawing from mythology, Confucian ideals, and legendary creatures. A final name will be revealed before landing.
This rover joins NASA's Perseverance—the heaviest and most advanced yet—which targets Jezero Crater on February 18.
