Japan low altitude satellite registered in Guinness World Records

Japan's super low altitude satellite "Tsubame" has been registered by the Guinness World Records as having achieved the "lowest altitude by an Earth observation satellite in orbit," the nation's space agency has announced.The satellite flew at an orbital altitude of 167.4 kilometers from Sept. 23 to 30 as part of its test mission from Dec. 23, 2017, to Oct. 1, 2019, compared with the 600 to 800 km zone where most Earth observation satellites operate.Tsubame maintained the record-low altitude for a period of seven days by using its ion engine system -- cultivated by the Japan Aerospace Explo…READ FULL ARTICLE