title: Cross-coherent vector sensor processing for spatially distributed glider networks.
abstract: Autonomous underwater gliders fitted with vector sensors can be used as a spatially distributed sensor array to passively locate underwater sources. However, to date, the positional accuracy required for robust array processing (especially coherent processing) is not achievable using dead-reckoning while the gliders remain submerged. To obtain such accuracy, the gliders can be temporarily surfaced to allow for global positioning system contact, but the acoustically active sea surface introduces locally additional sensor noise. This letter demonstrates that cross-coherent array processing, which inherently mitigates the effects of local noise, outperforms traditional incoherent processing source localization methods for this spatially distributed vector sensor network.
authors.affiliation: Department of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, Georgia 30332, USA bnichols8@gatech.edu, karim.sabra@me.gatech.edu.
authors.forename: Brendan
authors.initials: B
authors.lastname: Nichols
authors.affiliation: Department of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, Georgia 30332, USA bnichols8@gatech.edu, karim.sabra@me.gatech.edu.
authors.forename: Karim G
authors.initials: KG
authors.lastname: Sabra