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April 1975
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462 Reads
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1,304 Citations
Survey Review
This paper gives compact formulae for the direct and inverse solutions of geodesics of any length. Existing formulae have been recast for efficient programming to conserve space and reduce execution time. The main feature of the new formulae is the use of nested equations for elliptic terms. Both solutions are iterative.
... Gaussian distribution was used for the variable departure date and Gamma distribution was used for the variable stopover duration. We defined migration distance as the distance between the point of departure from the breeding site and point of arrival at the wintering site and calculated the great circle distance using Vincenty's formulae in the R package geosphere (Vincenty 1975;Hijmans 2022). We tested if migration distance or stopover duration was correlated with number of stopovers using Spearman's rank correlation. ...
April 1975
Survey Review
