I had no idea this was a technique! From a British Antarctic Survey report on these devices[1]: Accuracy In field trials at Bird Island, South Georgia

I had no idea this was a technique! From a British Antarctic Survey report on these devices[1]: Accuracy In field trials at Bird Island, South Georgia, the mean error (great-circle distance) in position estimation of static devices was 85 km, with standard deviations in latitudinal and longitudinal errors of 0.61° and 0.99°, respectively (BAS, unpublished data). [1] http://polaris.nipr.ac.jp/~penguin/oogataHP/pdfarticles/23p227-233.pdf http://polaris.nipr.ac.jp/~penguin/oogataHP/pdfarticles/23p2...