The LGM-35A Sentinel will replace the Air Force's Minuteman III fleet, in service since 1970, with the first of the new missiles due to become operational in the early 2030s. But it will take longer than that to build and activate the full complement of Sentinel missiles and the 450 hardened underground silos to house them.
One reason for routinely launching GPS satellites is simply "constellation replenishment," said Col. Andrew Menschner, deputy commander of the Space Force's Space Systems Command. Old satellites degrade and die, and new ones need to go up and replace them. At least 24 GPS satellites are needed for global coverage, and having additional satellites in the fleet can improve navigation precision. Today, there are 31 GPS satellites in operational service, flying more than 12,000 miles (20,000 kilometers) above the Earth.，推荐阅读91视频获取更多信息
政策端则打出“补贴激励+基建下沉”的组合拳。。业内人士推荐夫子作为进阶阅读
Nature, Published online: 24 February 2026; doi:10.1038/d41586-026-00530-y，这一点在WPS下载最新地址中也有详细论述