Space reconnaissance and mapping are essential elements of strategic missions. Space reconnaissance camera and mapping camera are payloads of earth observation satellites.

航天侦察和测绘是战略武装必不可少的组成部分，航天侦察和测绘相机是对地观测卫星的有效载荷。

youdao

When we realized that everything we do, every operation, every communication, satellites for observation, for surveillance and reconnaissance, everything revolves around space.

就是那时我们才意识到我们做的每件事、每个行动、每次交流、用于观测监视勘察的卫星——所有的一切都要绕着太空打转。

youdao

When we realized that everything we do, every operation, every communication, satellites for observation, for surveillance and reconnaissance, everything revolves around space.

当我们意识到我们所做的每件事，每个操作，每次通讯，众多用于侦察或估测的观察卫星，每件事都紧密围绕着航空。

youdao

Arguably, the Blackbird has greater survivability than most U.S. space-based reconnaissance systems.

CENTERFORSECURITYPOLICY: Center for Security Policy | Congress Must Preserve A Vital Strategic Reconnaissance Capability �� The SR-71

Our experience tells us that the contribution made to U.S. national security in the future by space-based reconnaissance, communications, navigation and other systems will only continue to grow.

CENTERFORSECURITYPOLICY: AN OPEN LETTER TO PRESIDENT CLINTON

The SR-71 has proven its value as a complementary system to U.S. space-based reconnaissance assets during the prolonged period from 1985 to 1987 when the United States was unable to place new satellites in orbit.

CENTERFORSECURITYPOLICY: Center for Security Policy | Congress Must Preserve A Vital Strategic Reconnaissance Capability �� The SR-71