Abstract: A method of positioning an instrument by an unmanned aircraft for measurement purposes relating to a target surface is provided. The method includes coupling the instrument to the unmanned aircraft and moving the unmanned aircraft to position the instrument away from the target surface. The method further includes stabilizing the unmanned aircraft to maintain a constant altitude and a level attitude relative to the target surface and orientating the instrument perpendicular to the target surface. A measurement is conducted by the instrument while the instrument is orientated perpendicular to the target surface. The method also includes transmitting the measurement to a receiver.