Abstract: An attitude determining system based upon the global positioning system is disclosed and provides dynamic, real time three-dimensional attitude, position, and time information on any vehicle in which it is located. The system works at high latitudes, and be immune to magnetic deviations, pressure, temperature, and gravity. The attitude determining system makes use of certain hardware configurations and mathematical algorithms to overcome the limitations of the prior art and eliminate errors related to the motion of the vehicle platform. When used with an integrated laser rangefinder the device is used for target or survey point geolocation.