Viking 1

Viking 1 combined an orbiter and stationary lander; its lander reached Chryse Planitia in 1976 and performed imaging, meteorology, and life-detection experiments.

viking-1 is a mars lander and orbiter focused on Mars; its mission record separates planned measurements from the results actually documented.

For viking-1, the defining design choice was to use a mars lander and orbiter for successful long-duration mars surface operations. That choice determines what the spacecraft can observe, how it moves or operates, and what risks the team must manage.

For viking-1, the cited record places the spacecraft at Mars; the engineering profile keeps its instrument, power, communications, and navigation details separate from the mission narrative.

Documented result: Successful long-duration Mars surface operations. For viking-1, that result is the evidence users can compare with the original objective and source record.

The connected engineering entry for viking-1 explains which hardware produced or supported these measurements.