SPACECRAFT COMMUNICATIONS & TRACKING A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site ground track An imaginary line on the Earth’s surface that traces the course of another imaginary line between Earth’s center and an orbiting satellite. Related category    • SPACECRAFT COMMUNICATIONS AND TRACKING Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP