NPD 7120.4E - main - NASA

nasa 4dNASA worked with 4D Vision Technology- later acquired by Tucson, Arizona-based 4D Technology Corporation- to develop interferometers that could test large space mirrors. 4DNASA Ames Research Center, Moffett Field, CA 94035 ... heavily on the exchange of 4D trajectory information to achieve hher levels of automation for conflict detection