Geolocation estimation of marine species using a high resolution light tag

An assessment of the migratory routes of marine species in the ocean without affecting their normal behaviour has long been a challenging problem both for marine biologists and engineers. The estimation of sunrise and sunset events helps in the computation of geolocation of the tagged species. The times of sunrise and sunset can be measured by using a light tag, comprising of a light sensor and a microcontroller. This paper presents the design and development of a light tag, capable of measuring light intensity levels even to the lowest values of 0.015 lux. Geolocation estimates have been computed and are found to be in perfect agreement, within the limits of experimental errors and variations in environmental conditions.