{"id":547667,"date":"2026-03-27T03:21:10","date_gmt":"2026-03-27T03:21:10","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/547667\/"},"modified":"2026-03-27T03:21:10","modified_gmt":"2026-03-27T03:21:10","slug":"u-s-gssap-satellites-execute-geo-handoff-to-monitor-chinas-shijian-29-spacecraft","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/547667\/","title":{"rendered":"U.S. GSSAP satellites execute GEO handoff to monitor China\u2019s Shijian-29 spacecraft"},"content":{"rendered":"

HELSINKI \u2014 Commercial space tracking data shows U.S. satellites coordinating maneuvers to maintain proximity and continuous observation of a pair of Chinese spacecraft in geostationary orbit.<\/p>\n

Observations by commercial space domain awareness provider Comspoc show USA 324 and USA 325, a pair of U.S. Geosynchronous Space Situational Awareness Program (GSSAP) satellites, executing a \u201chandoff\u201d operation between 14\u201318 March while tracking China\u2019s Shiiian-29A and 29B satellites.<\/p>\n

The geostationary orbit (GEO) is a belt 35,786 kilometers above the equator at which satellites\u2019 orbital velocity matches the rotation of the Earth. Raising or lowering an orbit above or below GEO allows them to drift either west or east along the GEO belt respectively, allowing repositioning.<\/p>\n

\u201cFor 4 days from 14-18 March, USA 324 and USA 325 (GSSAP) positioned themselves on opposite sides of China\u2019s Shijian-29A and 29B \u2014 a coordinated \u201cbracket\u201d providing observation angles from both east and west, followed by a handoff for continuous watch on the Chinese pair,\u201d the COMSPOC Operations Team wrote in a post<\/a> on X.<\/p>\n

USA 324 (GSSAP-5) had closed to within roughly 63 km of Shijian-29A by March 19, a relatively close distance in GEO that enables detailed observation while remaining within apparent safety margins. USA 325 (GSSAP-6), which had been tracking the pair since early January, performed a burn to depart the area, around 73 degrees East, March 18, completing the surveillance handover.<\/p>\n

\ud83d\udef0\ufe0f GEO INSPECTION EVENT: US satellites hand off on China’s SJ-29 pair<\/p>\n

For 4 days from 14-18 March, USA 324 and USA 325 (GSSAP) positioned themselves on opposite sides of China’s Shijian-29A & 29B \u2014 a coordinated “bracket” providing observation angles from both east and west,\u2026 pic.twitter.com\/Pogr3u635G<\/a><\/p>\n

\u2014 COMSPOC_OPS (@COMSPOC_OPS) March 26, 2026<\/a><\/p>\n

The Shijian-29 pair, part of a broad, experimental and often classified series of satellites, were launched towards GEO<\/a> in late December 2025 on a Long March 7A rocket. No images of the spacecraft were published, with China\u2019s state-owned main space contractor CASC describing the pair as to be mainly used to \u201cconduct verification tests of new technologies for space target detection.\u201d\u00a0<\/p>\n

This could be interpreted as being for space situational awareness (SSA) purposes, meaning the U.S. and China\u2019s inspector satellites are, as characterized by COMSPOC \u201cinspectors watching inspectors.\u201d However, the capabilities and operational role of Shijian-29A and 29B remain unclear.<\/p>\n

Ground-based observations of Shijian-29A and 29B in January by s2a Systems, a Swiss SSA firm, shed some further light on the pair. It suggests that Shijian-29A, developed by CASC\u2019s Shanghai Academy of Spaceflight Technology (SAST), appears much brighter than Shijian-29B, developed by the Innovation Academy for Microsatellites of the Chinese Academy of Sciences (IAMCAS). It is unclear if this difference in apparent brightness is due to the respective size, shape or even coatings of the spacecraft.<\/p>\n

The episode is the latest in a series of accelerating maneuvers and exchanges in GEO among major spacefaring powers, especially the U.S., China and Russia. These have fielded satellites capable of rendezvous and proximity operations (RPO), raising the question of the line between benign inspection and potential counterspace applications.<\/p>\n

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