A.COSPASS-SARSAT衛(wèi)星+1.6GHz信標(biāo)+地面段 B.COSPASS-SARSAT衛(wèi)星+406MHz信標(biāo)+地面段 C.Inmarsat衛(wèi)星+406MHz信標(biāo)+地面段 D.Inmarsat衛(wèi)星+1.6GHz信標(biāo)+地面段
A.LUT B.MCC C.RCC D.CES
A.4GHz B.6GHz C.1.6GHz D.9GHz