Characteristics of a reliable track.

• Main Authors: William S. D. Wilcock (3749737), Rose S. Hilmo (4537330)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Biological Sciences not elsewhere classified; Mathematical Sciences not elsewhere classified; Physical Sciences not elsewhere classified; studying marine mammals; passive acoustic monitoring; ocean bottom seismometers; many spurious solutions; increasing sampling rates; future experiments might; div >< p; balaenoptera musculus </; widely spaced network; false positives must; obtain tracks using; least 20 locations; earliest arrival time; different b calls; true positives; large network; b call; vocalize extensively; smooth paths; seismic frequencies; requiring groups; pacific northwest; obtained iteratively; minimize changes; localize calls; including constraints; important tool; follow within; first harmonic; feasible time; distance window; detecting harmonics; describe methods; calls identified; approaches lead; 15 hz; Pacific; Balaenoptera musculus
• Online Access: https://doi.org/10.1371/journal.pone.0260273.g011

Some characteristics of an example track that is considered reliable, comprising 33 locations on December 14 between 1334 and 1519 UT. (a) Locations of calls in the track (red pluses) and seismic stations (black triangles). (b) Locations of stations that contribute detections to the localization of each call in the track plotted relative to the call location and color coded by the estimated probability that the detection is a true positive. Open circles indicate stations that are missing from the localization but that were recording detections as evidenced by the presence of at least one detection within a time window extending from 60 s before the first detection in the localization to 120 s afterwards. (c). Cumulative count of detections contributing to the call localizations as a function of the range to the location (black solid line) and of stations for which detections are missing in the localization but for which at least one detections is available at the station from 60 s before the first detection to 120 s afterwards (red dashed line). Also shown is the ratio of these two counts (dot-dashed blue line). (d) Histogram showing the time between of successive locations in the track.