projects in conjunction with ground surveys (roadway, bridge, highway) Aerial surveys use a measuring camera where the elements of its interior orientation are known, but with much larger focal length and film and specialized lenses. Aerial survey sensors In order to carry out an aerial survey, a sensor needs to be fixed to the interior or the exterior of the airborne platform with line-of-sight to the target it is remotely sensing. With manned aircraft, this is accomplished either through an aperture in the skin of the aircraft or mounted externally on a wing strut. With unmanned aerial vehicles (UAVs), the sensor is typically mounted under or inside. Aerial survey systems are typically operated with the following: Flight navigation software, which directs the pilot to fly in the desired pattern for the survey. GNSS, a combination of GPS and inertial measurement unit (IMU) to provide position and orientation information for the data recorded. Gyro-stabilized mount to counter the effects of aircraft roll, pitch and yaw. Data storage unit to save the data that is recorded. Examples of aerial survey sensors Vexcel UltraCam (Eagle, Falcon, Osprey, Condor) and their calibrations. Leica ADS100 WaldoAir XCAM RIEGL LMS-Q780 Trimble AX80 See also Unmanned aerial photogrammetric survey References External links GIS and remote sensing for archeology PBS Nova—The Sky's Eyes: Remote Sensing in Archaeology Surveying Methods in archaeology Photogrammetry