Fastloc® technology, developed by Wildtrack Telemetry Systems Ltd, is ideal for species that only surface briefly. Tags equipped with a Fastloc-GPS receiver provide locations approaching the quality of those obtained from traditional GPS receivers, and can do so even when the tag is only at the surface for a very short period of time. The Fastloc-GPS receiver achieves this by taking a quick (i.e. fraction of a second) snapshot of the radio signals produced by overhead GPS satellites. These signals are processed onboard the tag and compressed into a snapshot containing just the satellite ID numbers, their respective pseudo ranges, and a timestamp. The processing and compression takes just 12 seconds and continues after the animal has dived. Up to 10 GPS satellites can be processed to provide location accuracies from 20 – 75 meters. The results are available to researchers in .CSV and .KMZ formats.
Details on how to process Fastloc location data using the Data Portal can be found in our User Guide.