Figure 2: GPS: The Present Imperfect April 22, 2010 By Facebook Twitter Linkedin Return to main article: "GPS: The Present Imperfect" Return to main article: "GPS: The Present Imperfect" Related Posts:GPS: The Present ImperfectESA Inside View on the Present and Future of GNSSGNSS Vulnerability: Present Dangers and Future ThreatsFigure 1: Acoustics & GPS