Now showing items 1-6 of 6

    • Bispectrum of ship-radiated noise 

      Sullivan, Edward J.; Hinich, M. J.; Marandino, Davide (NATO. SACLANTCEN, 1988/07)
      The bispectrum of ship radiated noise is estimated. The noise was received on a towed array being towed by the same ship that served as the noise source. The array was beamformed such that the forward endfire beam pointed ...
    • Estimators for model-based passive localization 

      Sullivan, Edward J.; Volkmann, W. M.; Bongi, Silvio (NATO. SACLANTCEN, 1988/07)
      A comparative study is made of the performance of four different estimators as used in the matched field technique of passive localization. The study is based on both real and synthesized data. In the synthesized data case, ...
    • Extended towed-array processor by overlapped correlator 

      Stergiopoulos, S.; Sullivan, Edward J. (NATO. SACLANTCEN, 1988/11)
      The development of an algorithm for extended towed-array measurements, which could be used by matched-field estimators to obtain information about depth and range of a source, is studied. This algorithm combines coherently ...
    • Passive localization using propagation models 

      Sullivan, Edward J. (NATO. SACLANTCEN, 1987/06)
      Passive ranging using propagation models can be effected in two different ways: forward modeling
    • Passive ranging with the SNAP model: a performance study 

      Sullivan, Edward J.; Rameau, K. (NATO. SACLANTCEN, 1987/07)
      A passive ranging technique which uses SNAP, the SACLANT Centre's normal-mode model, is studied. An examination is made of the sensitivity of the technique to errors in the assumed sound
    • Wavefront curvature ranging as a passive synthetic aperture problem 

      Sullivan, Edward J. (NATO. SACLANTCEN, 1997)
      A new method of wavefront curvature passive ranging is introduced that is based on a model-based approach. The signal and measurement systems are placed into state-space form, thereby allowing the unknown parameters of the ...