An advance in geolocation by light

By P. Ekstrom. 2004

243 citations recorded by the source corpus.

View Paper: https://www.semanticscholar.org/paper/4f088db4afb9f5d0c05976b537134413b6df7564

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

1. S. Teo
2. R. Phillips
3. B. Block
4. A. Boustany
5. K. Weng
6. Eldar Rakhimberdiev
7. K. Schaefer
8. Daniel P. Costa

Citations in the corpus

• Oceanographic preferences of Atlantic bluefin tuna, Thunnus thynnus, on their Gulf of Mexico breeding grounds (2007, methodology): “The LTD 2310 and NMT archival tags had onboard software that processed the light level and pressure data, corrected for light attenuation, and logged the estimated longitude into the ‘day log’ (Ekstrom 2004).”
• GeoLight – processing and analysing light‐based geolocator data in R (2012, methodology): “…are constrained to record a restricted range of light levels because of their limited data storage and enabling the use of more precise positioning methods (e.g. template fit, see the study by Ekstrom 2004) and sophisticated analysing tools (Sumner, Wotherspoon & Hindell 2009; Pedersen et al. 2011).”
• Annual migrations, diving behavior, and thermal biology of Atlantic bluefin tuna, Thunnus thynnus, on their Gulf of Mexico breeding grounds (2007, methodology): “The longitude was estimated from the time of local noon or midnight, using standard astronomical algorithms (Hill 1994; Ekstrom 2004).”
• Comparing inferences of solar geolocation data against high-precision GPS data: annual movements of a double-tagged black-tailed godwit (2016, methodology): “They also differ considerably from each other in a number of important respects (see Rakhimberdiev et al. 2015 for a more complete review): for example, GeoLight uses a more traditional ‘threshold method’ (Hill and Braun 2001), while FLightR uses a ‘template fit’ (Ekstrom 2004, 2007).”
• Geolocation by light: accuracy and precision affected by environmental factors (2012, methodology): “Finally, the ‘Hill–Ekstrom calibration’ is developed after the basic idea from the studies of Hill & Braun (2001) and Ekstrom (2004) and allows the calibration during stationary periods at unknown latitudinal positions.”
• Bio-logging science: sensing beyond the boundaries (2004, unknown): “…1990; Ferraroli et al., 2003; Hays et al., 2001), pop-up tags (Block et al., 1998), geolocators (Hill, 1994; Wilson et al., 1992; Afanasyev, 2004; Ekstrom, 2004) and technologies using the Global Positioning System (GPS, Steiner et al., 2000; Weimerskirch et al., 2002; Fukuda et al., 2004;…”
• Short-term effects of data-loggers on Cory’s shearwater (Calonectris diomedea) (2005, background): “Once recovered, it allows analysis of a bird’s movements with about 180 km accuracy, as each location has a unique combination of time of sunrise and photoperiod length (Hill 1994; Ekstrom 2004; Phillips et al. 2004; Afanasyev 2004).”
• Multicolony tracking reveals the winter distribution of a pelagic seabird on an ocean basin scale (2012, unknown): “Data from Lotek loggers were processed in LAT Viewer Studio (Lotek Wireless) using the template fit option (Ekstrom, 2004) and a filtering process as above, with equinox data removed for 18 September–4 October and 1 March–24 March.”
• Movements of the reef manta ray (Manta alfredi) in the Red Sea using satellite and acoustic telemetry (2015, methodology): “Thus, it avoids at least some of the problems associated with threshold algorithms (Ekstrom 2004; Nielsen and Sibert 2007), including those used by manufacturer software (Hill and Braun 2001).”
• The European eel (Anguilla anguilla, Linnaeus), its Lifecycle, Evolution and Reproduction: A Literature Review (2005, methodology): “Temperature and pressure sensors provide information about the vertical movements of the fish in relation to the thermal structure of the water column and horizontal movements can be reconstructed using lightbased geolocation techniques (e.g. Hill 1994; Arnold and Dewar 2001; Ekstrom 2004; Stokesbur”
• The Use of Electronic Tags in Fish Research - An Overview of Fish Telemetry Methods (2013, methodology): “However, these geolocation methods have some limitations (Ekstrom, 2004; Teo et al., 2004; Chittenden et al., 2013b).”
• Movements, behavior, and habitat utilization of yellowfin tuna (Thunnus albacares) in the northeastern Pacific Ocean, ascertained through archival tag data (2007, methodology): “The light data can be processed using astronomical algorithms to provide daily estimates of longitudes and latitudes (Hill 1994; Hill and Braun 2001; Ekstrom 2004), and daily sea-surface temperatures (SSTs) recorded by the tags matched to SSTs from remote sensing can be used to significantly…”
• Validation of geolocation estimates based on light level and sea surface temperature from electronic tags (2004, methodology): “Multiple pairwise bootstrap hypothesis tests (1000 bootstrap samples) were used to detect any differences in the root mean square (rms) error of the various geolocation estimates (Efron & Tibshirani 1993).”
• Tracking migratory songbirds: accuracy of light‐level loggers (geolocators) in forest habitats (2012, background): “Uncertainties in archived light values are known to cause smaller errors in longitude than latitude, regardless of the season (Ekstrom 2004).”
• Trans-equatorial migration and habitat use by sooty shearwaters Puffinus griseus from the South Atlantic during the nonbreeding season (2012, methodology): “Light data recorded by Lotek LAT 2500 geolocators is processed internally using template fitting software, producing a single location per day (Ekstrom 2004).”