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5万年。“未来考古鸟”究竟能否承受如此漫长的岁月风霜?KEO卫星,计划在一个距离地面1800公里、与赤道倾角为57度的轨道上运行。由于卫星必须是在5万年后自然返回(它的能量随着运行时间的增加而逐渐损耗,自动降低高度,最后以螺旋型路线返回地球),轨道的高度必须经过严密计算。根据发起人法国科学家菲利浦的介绍,“未来考古鸟”轨道的设计和测算,目前是由法国军方的相关部门在进行。
50,000 years Whether the future archeological bird can withstand such a long period of weather-frightening KEO satellite, it is planned to run on an orbit 1800 km above the ground with an inclination of 57 degrees to the equator. Since the satellite must return spontaneously 50,000 years later (its energy is gradually depleted with increasing operating hours, the altitude is reduced automatically, and finally the Earth is returned in a spiral), the altitude of the orbit must be carefully calculated. According to the introduction by the French scientist Philip, the sponsor, the design and calculation of the “Future Archeology Bird” track are currently being carried out by the relevant departments of the French military.