Fig. 9

Speed calibration curves for deployment mn200312-58. Plots result from cell 11 in MainCATSprhTool.m. “Speed” in all cases is the estimated speed from orientation-corrected depth rate (OCDR). Steep descents or ascents are necessary to have accurate estimations of speed using this method. A OCDR vs amplitude of tag vibrations as measured by the accelerometer (tag jiggle), colored by animal pitch and animal depth using the default restrictions (|pitch|> 40°, depth > 5 m). B User interface allows for clicking on the color bar to increase the restriction to exclude points, where OCDR is less accurate as a metric. In this panel, restrictions were updated to |pitch|> 60°, 5 m < depth < 251 m. Lower panel shows the separation of the data into two distinct calibration sections that result from different orientations of the tag on the whale (thus different turbulent flow regimes causing different relationships with speed). C Final check that plots speed derived from a regression with tag jiggle as well as speed derived from a regression with flow noise against individual OCDR-derived speed estimates as a time series. Bottom panel shows the regression and correlation coefficients for the regression on just this section’s data (pink line and blue dots) as well as if all data from the deployment are used (green line and dots)