board map

... as well as an important tool for map-making, and land surveying. GPS also ... airspace, killing all 269 people on board, Ronald Reagan announced that the GPS ... an Interagency GPS Executive Board to manage it as a national asset. In ... the national policy, replacing the board with the National Space-Based ... synchronize the atomic clocks on board each satellite to within one ... for this, the frequency standard on-board the satellites runs slightly slower