Abstract
Data from the August 2003 experiment conducted by the Scripps Institution of Oceanography in the Southern California Offshore Range (SCORE) are used to track marine mammals. SCORE is a naval training area near the island of San Clemente located in relatively shallow water. The water depth where the experiment was conducted is around 360 meters. Data were recorded on a 100-m, eight-element vertical line array (VLA) deployed from the floating instrument platform (FLIP) and four bottom-mounted hydrophones deployed in an area covering approximately 3 square kilometers. During the course of the 7-day experiment continuous recording of the ocean environment was made. The recordings contain calls from various marine mammals, particularly blue and fin whales. Data recorded on the bottom-mounted hydrophones and the VLA are used to track singing marine mammals using two entirely different model-based tracking techniques: The animals are tracked by comparing the predicted (using a propagation model) and measured time difference of arrival recorded in pairs of bottom-mounted hydrophones. Additionally, matched-field processing on the VLA data is used to estimate the range and depth of the animals.
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