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Jim Lau of Racelogic details the company’s GNSS Simulator and VBOX Speed Sensor IMU while at Unmanned Systems 2015, held May 4-7 in Atlanta. VOBX is a 100Hz dual antenna GPS/GLONASS speed sensor (VBSSISL) that combines signals from an integrated inertial measurement unit (IMU) with those from GPS to provide smoother output data even when satellite reception is interrupted.