Use wechat to scan QR code < / P > < p > to share with friends and circle of friends < / P > < p > US space exploration technology company < a target = "_ blank" href=" https://news.163.com/news/search?keyword=SpaceX "> SpaceX < / a > has achieved a new milestone, the United States < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E5%9B%BD%E9%98%B2%E9%83%A8 "> DOD < / a > for the first time allows the company to use recycled < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E7%81%AB%E7%AE%AD%E5%8F%91%E5%B0%84 "> rocket launch < / a > military mission, which will make its national security < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E5%8D%AB%E6%98%9F "> satellite < / a > put into orbit SpaceX will launch GPS III sv05 satellite for space forces from Florida on Thursday EST, using the Falcon 9 rocket recovery booster that launched GPS III sv04 satellite last November. Booster is the largest and most expensive part of Falcon 9 rocket, which can be reused many times to save money < p > US space force space and < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E5%AF%BC%E5%BC%B9 "> Walter Lauderdale, deputy director of missile < / a > Systems Center, said at a press briefing:" in order to prepare for the launch, we work closely with SpaceX to understand the renovation process and believe that the rocket is ready for the next flight. " < p > so far, the US Department of defense has awarded six GPS III satellite launch contracts, five of which have been awarded SpaceX. Only GPS III sv02 has been launched by its competitor, United Launch Alliance (ULA), a rocket manufacturing joint venture between Boeing and Lockheed Martin. The five launch contracts, valued at $469.8 million, initially did not include the Falcon 9 rocket recovered using SpaceX < p > GPS III is a substitute for 31 GPS satellites currently operating in orbit. Last year, the space and missile systems center of the U.S. space force revised the contracts for SpaceX's next two GPS III satellite launches to allow the use of recycled rockets. The military estimates that this will save about $64 million < p > it is worth noting that the US Air Force requires SpaceX to use the same booster as the GPS III sv04 satellite to launch GPS III sv05. However, Lauderdale said that the center has "no other restrictions" on how SpaceX will use Falcon 9 booster in the future, and stressed that the space forces are also open to the use of recovery booster to launch national security payloads in non military missions "We will continue to work with SpaceX and prepare for next year's launch of GPS III sv06," Lauderdale said. We will work closely with them to find out which boosters are available. We are certainly open to using other boosters, not just those that have been recycled. " < p > the move marks another step forward for the U.S. military in supporting SpaceX's re-use of rockets, as the government had previously asked the company to use new rockets and discard boosters in the ocean < p > Lauderdale said that the space and Missile Systems Center has been committed to promoting the use of reusable rocket launch in the past five years, and has put forward new requirements. He pointed out that the center reviewed more than 440 booster improvements and completed more than 380 verification steps before launch. "Overall, our rigorous approach is an important part of the success of each mission," he added（ Small) < / P > < p > <-- EndFragment-->