它的星座由66个低地球轨道交联卫星组成，并有多个卫星在轨备用。
Its constellation consists of 66 low earth-orbiting, cross-linked satellites and has multiple in-orbit spares.
铱公司还说，它期望在30天之内用八颗在轨备用卫星中的一颗来替代失去的卫星。
Iridium also said it expected to replace the lost satellite with one of its eight in-orbit spares within 30 days.
应用推荐