China builds large commercial radar satellite constellation

The large-scale application of a Chinese commercial radar remote sensing constellation composed of 12 satellites began on Monday, according to PIESAT, a Beijing-based satellite firm. The announcement came after four PIESAT-2 satellites, which were launched into a 528-kilometer sun-synchronous orbit last week, were calibrated and successfully transmitted high-resolution images and data back to Earth. More

(Source: Space Daily - Dec 28)