Since 1989, Aerial Data Service has used Global Positioning System (GPS) technology to accurately and efficiently perform photogrammetric control surveys and establish control networks. Twenty-eight (28) U.S. Department of Defense Navigation Satellite Timing and Ranging (NAVSTAR) satellites transmit time and satellite-position information to ground-based GPS receivers. Baselines are determined between the ground GPS receivers and the satellites, and coordinate positions are then calculated.
Utilizing GPS technology, ADS can determine positions with accuracies up to 1 centimeter + 1ppm. For a listing of GPS projects completed by ADS, visit our "Projects" page.
