1. A method of determining an azimuth and elevation of a radiation emission source using a single-axis direction finding system, the method comprising the steps of: receiving a plurality of radiation signals at the single-axis direction finding system, the plurality of radiation signals being emitted from the radiation emission source, each of the plurality of radiation signals being received at one of a plurality of attitudes of the single-axis direction finding system; measuring an angle of arrival of each of the plurality of radiation signals with respect to the single-axis direction finding system; calculating an azimuth angle of each of the plurality of radiation signals with respect to the single-axis direction finding system using the respective measured angle of arrival; calculating a respective vector corresponding to each of the azimuth angles at different elevation angles within a predetermined range; and determining an elevation angle of the radiation emission source with respect to the single-axis direction finding system by determining a conversion point of the vectors.