摘要: If an airplane crashes, emergency locator transmitter (ELT) is activated. The crash site can then be located by taking bearings on the ELT signal. statistical problem consists of estimating a two-dimensional location parameter, where data consist directional observed, with some error, from several known positions. We develop methods for variations basic problem: unidirectional and bidirectional observations, biased finally, techniques that are insensitive to outliers. These easily implemented portable microcomputer, seem perform quite well when applied actual data.