Issue 55

China Launches 4th Set of Yaogan-35 Triplets

China launched the fourth Yaogan-35 triplet on 19 August 2022, bringing the constellation to twelve satellites in similar 500km, 35-degree orbits.

19 Aug 2022: Just 2 weeks after launching its third set of YG-35 satellites, China launched its fourth trio of Yaogan 35 (YG-35(04)) military reconnaissance satellites to orbit. Both sets used a Long March 2D rocket and were launched from Xichang Satellite Launch Center. Details from the Chinese government on the individual satellites’ on-orbit operations are sparse. Despite this, spacecraft analysis and comparisons to western missions and previous Chinese launches help build a gradual understanding. Launch Video.

– The new trio joined three sets of Yaogan 35 satellite triplets sent into orbit in Nov 2021, Jun 2022 and Jul 2022. All twelve satellites orbit at roughly 500km altitude with an inclination of 35 degrees, providing repeated passes over areas of interest.

– CASC stated that the satellites would be used for space scientific experiments, monitoring land usage and natural resources, and other scientific purposes.

– The European Space Policy Institute notes in its yearbook that China’s Yaogan series satellites are perceived by analysts to serve both civil and military users.

– As with earlier Yaogan 35 launches, two of the three satellites were developed by Aerospace Dongfanghong Satellite Co., Ltd., with the third provided by the Shanghai Academy of Spaceflight Technology (SAST), both operating under CASC.

– The mission also included a payload adapter with a drag sail designed to help deorbit the roughly 300kg adapter much sooner than otherwise. Drag-sail background.

As of 23 Aug, the three YG-35(04) satellites appeared to be maneuvering toward the one-lead, two-trail configuration exhibited by YG-35(01), YG-35(02) and YG-35(03).

Yaogan-35(01) formation.

Yaogan-35(02) formation.

Yaogan-35(03) formation.

Yaogan-35(04) formation.

YG-35 constellation, Nov 2021.

YG-35 constellation, Aug 2022.

Drag-sail / payload-adapter graphic from the YG-35 mission.