HELSINKI — China sent six experimental Shiyan series satellites into orbit late Friday Eastern, using its Long March 6A rocket launched from Taiyuan. The Long March 6A rocket lifted off at 6:51 p.m. Eastern (2251 UTC) April 18 from Taiyuan Satellite Launch Center, northern China. The state-owned Shanghai Academy of Spaceflight Technology (SAST) announced launch success, revealing the payloads to be Shiyan-27 (01-06). SAST provided no images nor details of the satellites, instead stating that they are mainly used for space environment detection and related technical tests. This general description is typical of the Shiyan series, which is considered by...