One Gigasample Per Second Data Acquisition Using Available Gate Array Technology Ken Wagner NASA GSFC A new NASA instrument forced demanding requirements upon its altimeter digitizer system. Eight-bit data would be generated at a rate of one billion samples per second. NASA had never before attempted the feat of capturing such high-speed data in the radiation, low-power, no-convective-cooling, limited-board-area environment of space. This presentation describes how the gate array technology available at the time of the design was used implement this one gigasample per second data acquisition system.