Skip to main content

Table 4 Summary of number of locations estimated and distance to average GPS position using two methods of light level location estimation

From: A probabilistic algorithm to process geolocation data

Species and time period

Method

# of locations

Median distance to GPS location [km]

Mean ± sd (min – max) distance to GPS location [km]

black-browed albatross during solstice

- 5.0°

sun elevation

504

226

347 ± 448 (13 – 4170)

 

geographic median particle

482

185

235 ± 218 (5 – 2740)

 

particle cloud

482

19

66 ± 168 (0 – 2380)

wandering albatross during equinox

- 5.8°

sun elevation

79

662

1225 ± 1478 (80 – 5925)

 

geographic median particle

148

145

155 ± 82 (8 – 493)

 

particle cloud

148

17

25 ± 24 (1 – 133)

  1. Geographic median particle refers to the calculated most probable movement track, and particle cloud refers to the minimum distance of the iterated particle cloud from the GPS location (see Methods for details). Black-browed albatrosses were tracked around the solstice and wandering albatrosses around the equinox