In 1973, the U.S. Department of Defense started the global positioning system project to enable worldwide geolocation with pinpoint accuracy. The first GPS prototype spacecraft launched in 1978, and the full original constellation of 24 satellites became operational in 1993. At first, just the U.S. military used GPS, but by the end of the 20th century, regular citizens — you and I — had access, too.
Dead reckoning: thoughts on 2020
Dead reckoning: thoughts on 2020
Dead reckoning: thoughts on 2020
In 1973, the U.S. Department of Defense started the global positioning system project to enable worldwide geolocation with pinpoint accuracy. The first GPS prototype spacecraft launched in 1978, and the full original constellation of 24 satellites became operational in 1993. At first, just the U.S. military used GPS, but by the end of the 20th century, regular citizens — you and I — had access, too.