A.差分解B.固定解C.浮點(diǎn)解D.單點(diǎn)解
A.1B.2C.3D.4
A.衛(wèi)星時(shí)鐘誤差B.大氣對(duì)流層折射C.衛(wèi)星軌道誤差D.信號(hào)的多路徑效應(yīng)