Presentation of Errors

Since both latitude and day of year will have a profound effect on the accuracy of the latitude determination, it is important that positions generated from observed dawn/dusk times be provided with error estimates. Ideally, all locations should be plotted on a map using rectangles that indicate the limits of the animal's position to a given level of certainty. It should be noted that the center of such rectangles will not necessarily represent the likeliest location of the animal.

Fig. 12.7
Example of analysis program's graphical output. The light-level curve is shown with
markers for derived dawn/dusk times and the calculated position range.