Articles and Explanations

Comparative Performance of Current-generation Geolocating Archival Tags
A paper by Kurt M. Schaefer and Daniel W. Fuller evaluating the performance of the Lotek LTD 2310 archival tag.

Migratory shearwaters integrate oceanic resources across the Pacific Ocean in an endless summer
A paper by Scott A. Shaffer et al. published in PNAS in August 2006, with data from LTD 2400 archival tags showing that sooty shearwaters "fly across the entire Pacific Ocean in a figure-eight pattern while traveling 64,037 ± 9,779 km roundtrip, the longest animal migration ever recorded electronically."

An advance in geolocation by light
This paper describes a new threshold-free method of geolocation using sun light levels. The approach promises to offer many advantages over traditional threshold methods used today.

Correcting light at depth
A paper on inferring the surface irradiance from measurements made at depth with Lotek LTD 2000 geolocation archival tags.

Blue twilight in a simple atmosphere
When doing measurements for geolocation, especially in ocean fish, there is good reason to confine one's attention to blue light. This is a paper on the advantages (to guide system design) of strong absorption and scattering of blue light in the atmosphere.

Locating tuna in the open ocean
A paper describing the use of LTD 2000 geolocation archival tags to determine daily latitude and longitude estimations based on observed sunlight levels.

Frequency choice for radio telemetry: the HF vs. VHF conundrum
An overview of the 7 individual components of a radio telemetry system, examining the role played by each in system optimization.