Fig. 2
Estimation of PSAT pop-up location using a tag’s drift path (target-tag method, a, b) or the drift path of a proxy tag (proxy-tag method, c, d). Yellow circles are the estimated pop-up location (P0), teal circles are the first high-quality Argos location estimate (P1), and red circles are the next Argos drift location estimate that satisfies requisite time and quality criteria (P2). Orange and pink circles are a spatiotemporally adjacent set of Argos drift location estimates from a proxy tag that satisfy requisite time and quality criteria (P1* and P2*). Dark-blue dots are Argos drift locations and corresponding light-blue ellipses are Argos-estimated 63% error ellipses. Purple ellipses are composite 95% error ellipses based on all Argos-estimated error ellipses associated with drift locations used to estimate pop-up location