每次任务都发射一枚具备从火星轨道拍摄火星表面能力的人造卫星，同时充当与海盗登陆者进行联络的中间站。

Each mission had a satellite designed to photograph the surface of Mars from orbit, and to act as a communication relay for the Viking lander that each mission carried.

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每次任务都发射一枚具备从火星轨道拍摄火星表面能力的人造卫星，同时充当与海盗登陆者进行联络的中间站。

Each mission had a satellite designed to photograph the surface of Mars from orbit, and to act as a communication relay for the Viking lander that each mission carried.

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