Ballistic calculation drives electronic computing

She used satellite observations and numerical computation to refine an oblate, irregular model of the planet.

Orbit calculations, error correction and large datasets were essential long before a navigation device could report a position.

West's contribution remained little known publicly for decades, illustrating how technical teamwork can hide key individuals.

The large electronic computer demonstrated that many numerical procedures could be executed at unprecedented speed.

Six women translated mathematical problems into switch settings, cable connections and operation sequences, yet were long omitted from accounts.

ENIAC required decomposition of equations, planning of data flow, testing and debugging before stored-program languages existed.

The lunar module reached the Moon after a mission dependent on trajectory design, numerical simulation, navigation and real-time calculation.

Johnson calculated and checked trajectories and helped design procedures for synchronizing spacecraft in lunar orbit.

Mainframes, onboard guidance, ground teams and hand-prepared backup charts formed one distributed calculating system.

Its mathematics produced a historic achievement while relying on immense state spending, military technology and geopolitical competition.