How GPS and GLONASS Got Together-and Other Recent Events

摘要

October 18, 1989, the Queen Elizabeth Auditorium in London, around 8:30 am. Unknown to me, two 60-minute periods were about to imprint themselves indelibly on my memory. 1 walked up the stairs to the exhibition booth of my company, Ashtech, at The Royal Institute of Navigation conference. My good friend, the late Ann Beatty, met me and asked, "Any news from home?" I thought it was just a casual customary question, and replied: "Thanks, all OK." She had a strange look on her face. She continued: "Are all your family really OK?" I replied again: "Thanks, all good." She then realized that 1 had no clue about the cataclysmic event that had hit the San Francisco Bay area. She abruptly said, "Don't you know? The big one came! The big earthquake hit San Francisco!"