User Information E-mail address: Password: I Forgot My Password New User Registration		catalog • electronics • radar and gps   select a product 502875 RVSII Radar Dickey-john radar with 4-pin AMP connector. Measures true ground speed, regardless of wheel slip, under actual field conditions. 10 ft. cable. Includes mounting brackets and instructions. 502808 Velo/GS™ GPS Sensor Ground speed sensor with 4-pin round connection. 502805 ISpeed Ground Sensor Dickey-john ISpeed™ ground speed sensor with 4-pin round connection. 20Hz GPS receiver with WAAS correction (no subscription required). Fast update times, equivalent to radar.