Website: https://www.navtechgps.com/departments/equipment/antennas/l1l2_gps/ Address: 5501 Backlick Road Suite 230, Springfield, VA 22151 Phone: 703-256-8900 NavtechGPS is a reseller of hundreds of GPS antennas from Antcom, Garmin, Hemisphere GNSS, navXperience, NovAtel, PCTel, Septentrio, Tallysman Wireless and Trimble Navigation. We value opportunities to help educate our partners and customers about GPS antennas and so Navtech also leads the way in GPS and GNSS training, offering a comprehensive list of courses taught by world-class instructors. We specialize in bringing any of our courses on-site to your location to save you time and money. For more information on our GPS antennas please contact us today.