ATSA - Acoustic Tracking System for AUV
Array was contracted by DRDC-Atlantic to produce software in IDL and LabVIEW capable of localizing an Autonomous Under Water vehicle (AUV) in real-time by using data provided through hydrophones, GPS, and acoustic modems.
The AUV Acoustic Tracking System was developed for the 2011 Project Cornerstone Arctic field trial and has two main components. First, a transducer is installed on each of the vehicles which generates a hyperbolic frequency modulated (HFM) acoustic signal (or a similar signal with a narrow autocorrelation function) of fixed time duration at predetermined regular time intervals. Second, an above water system is being developed that relies on the existence of a stable ice pan(s), where a Beacon Camp and three Remote Node stations are to be deployed. Each of the Remote Node stations are evenly distributed around the Beacon Camp at approximately a 3 km radius. A Remote Node consists of a hydrophone, an acoustic modem, a GPS, and a FreeWave radio to link the node to the Beacon Camp. All three remote nodes are programmed to regularly transfer their hydrophone data (from the received HFM signals) and the GPS positions to the Beacon Camp for processing. In addition, the Beacon Camp will consist of a Cross-Dipole Hydrophone Array (CDHA), an acoustic modem, and a GPS.
Array developed the IDL and LabVIEW modules that integrate into a framework capable of performing the signal processing, communication, and optimization necessary to effectively localize the AUV.