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GERSTOFT, PETER

Geophysicist

Degrees:

• M.S., Technical University of Denmark
• M.S., University of Western Ontario
• Ph.D., Technical University of Denmark

Research Interests:

• Inverse problems in ocean acoustics, seismology, and electromagnetics
• Sequential filtering (particle filters)
• noise and signal processing in seismology and ocean acoustics.
• Seismic imaging with noise.
• Origin of Microseisms.
• Tropospheric electromagnetic propagation and environmental parameter inversions.
• Matched-field processing and full-field inversions for water column and seafloor geoacoustic parameters.

Courses Recently Taught:

• SIO 202B: Fundamentals of Wave Physics
• SIO202B: Fundamentals of Wave Physics

Mentoring:

• Daniel , Tan (Graduate; 2009-2014)
• Michael, Lewis (Post Doc; 2009-2010)
• Menon, Ravishankar (Graduate; 2008-2013)
• Ray, Tim (Graduate; 2008-2013)
• Nick, Harmon (Post Doc; 2007-2008)
• Yardim, Caglar (Post Doc; 2007-2010)
• Zhang , Jian (Post Doc; 2007-2010)
• Brooks, Laura (Graduate; 2006-2008)
• Goh, Yong Han (Graduate; 2006-2007)
• Traer, James (Graduate; 2006-2011)
• Huang, Chenfen (Post Doc; 2005-2007)
• Castor, Kaelig (Post Doc; 2002-2004)
• Yardim, Caglar (Graduate; 2002-2007)
• Battle, David (Post Doc; 2001-2003)
• Huang, Chenfen (Graduate; 2000-2005)
• , (Graduate; -)

Yardim, Caglar, Peter Gerstoft and WS Hodgkiss (2009), Sensitivity analysis and performance estimation of refractivity from clutter, Radio Science, in press.

Brooks, Laura A, Peter Gerstoft, Ocean acoustic interferometry of 20–100 Hz noise from a tropical storm, J Acoust. Soc. Am , submitted.

Yardim, Caglar, Peter Gerstoft and WS Hodgkiss (2009), Tracking of geoacoustic parameters using Kalman and particle filters, J Acoust. Soc. Am, in press.

Gerstoft, P, PM Shearer, N Harmon, and J Zhang, Global P, PP, and PKP wave microseisms observed from distant storms, Geophys. Res. Lett., 35, doi:10.1029/2008GL036111.(movie June 2006)

Harmon, N, P Gerstoft, CA Rychert, GA Abers, M Salas de la Cruz and KM Fischer (2008), Phase velocities from seismic noise using beamforming and cross correlation in Costa Rica and Nicaragua, Geophys. Res. Lett., 35, L19303, doi:10.1029/2008GL035387.

Traer, J, P Gerstoft, PD Bromirski, WS Hodgkiss, and LA Brooks (2008), Shallow-water seismo-acoustic noise generation by Tropical Storms Ernesto and Florence, J Acoust. Soc. Am EL, 124, EL170-176, DOI:10.1121/1.2968296.

Gerstoft, P, WS Hodgkiss, M Siderius, CF Huang, CH Harrison (2008), Passive fathometer processing, J Acoust. Soc. Am, 123, 1297-1305.

Huang, CF, P Gerstoft and WS Hodgkiss (2008), Effect of ocean sound speed uncertainty on matched-field geoacoustic inversion, J Acoust. Soc. Am, EL162-168 (2008).

Brooks, LA, P Gerstoft, and DP Knobles (2008), Multichannel array diagnosis using noise cross-correlation, J Acoust. Soc. Am. EL,124,EL203-EL209, DOI:10.1121/1.2960937.

Jiang, YM, NR Chapman, and P Gerstoft (2008), Short range travel time geoacoustic inversion with vertical line array, J Acoust. Soc. Am EL,124, EL135-140, DOI: 10.1121/1.2963093.

Yardim, Caglar, P Gerstoft and WS Hodgkiss (2008),Tracking refractivity from clutter using Kalman and particle filters, IEEE Transaction Antenna and Propagation, 56, 1058-1066, DOI:10.1109/TAP.2008.919205.

R Douvenot, V Fabbro, P Gerstoft, C Bourlier, and J Saillard (2008), A duct mapping method using least squares support vector machines, Radio Science, doi:10.1029/2008RS003842.

Gerstoft, P, and T Tanimoto (2007), A year of microseisms in southern California, Geophys. Res. Lett., 34, L20304, doi:10.1029/2007GL031091.

Huang, CF, P Gerstoft, and WS Hodgkiss, On the effect error correlation on matched-field geoacoustic inversion, J Acoust. Soc. Am.,121: EL64-EL69, DOI:10.1121/1.2424267, 2007.

Brooks, LA and P Gerstoft (2007), Ocean acoustic interferometry, J. Acoust. Soc. Am., 121, 3377-3385, doi:10.1121/1.2723650.

Goh, YH, P Gerstoft, WS. Hodgkiss, CF Huang, Statistical estimation of transmission loss from geoacoustic inversion using a towed array, J. Acoust. Soc. Am,122, 2571-2579, 2007.

Vasudevan, S, RH Anderson, S Kraut, P Gerstoft, LT. Rogers, and JL. Krolik (2007), Recursive Bayesian electromagnetic refractivity estimation from radar sea clutter, Radio Sci., 42, RS2014, doi:10.1029/2005RS003423.

Yardim, Caglar, P. Gerstoft, and W. S. Hodgkiss (2007), Statistical maritime radar duct estimation using hybrid genetic algorithm-Markov chain Monte Carlo method, Radio Sci., 42, RS3014, doi:10.1029/2006RS003561.

Westward Migration, Editors' Choice, Science, 29 September 2006 Hurricane Katrina's waves felt in California, New Scientist, 23 September 2006

Gerstoft, P., MC Fehler, and KG Sabra, When Katrina hit California, Geophys. Res. Lett., 33, L17308, doi:10.1029/2006GL027270, 2006.

Curtis, A, P Gerstoft, H Sato, R Snieder, K Wapenaar. Seismic interferometry - turning noise into Signal. The Leading Edge, Vol 25, 1082-1092, 2006. Received "Honorable Mention" for best paper in TLE.

Gerstoft, P, KG Sabra, P Roux, WA Kuperman, and MC Fehler, Green’s functions extraction and surface wave tomography from microseisms in Southern California, Geophysics, 71, SI23-SI31, 2006.

Sabra, KG, P Roux, P Gerstoft, WA Kuperman, and MC Fehler, Extracting coherent coda arrivals from cross-correlations of long period seismic waves during the Mount St. Helens 2004 eruption, Geophys. Res. Lett., 33, L06313, doi:10.1029/2005GL025563, 2006.

Yardim, Caglar, P Gerstoft, and WS Hodgkiss, Estimation of radio refractivity from radar clutter using Bayesian Monte Carlo analysis, IEEE Transaction Antenna and Propagation, 54,1318- 1327, doi: 10.1109/TAP.2006.872673, 2006.

Huang, CF, P Gerstoft, and WS Hodgkiss, Validation of statistical estimation of transmission loss in the presence of geoacoustic inversion uncertainty, J. Acoust. Soc. Am, 120, 1932-1941, 2006.

Thode, A, P Gerstoft, WC Burgess, K Sabra, M Guerra, D Stokes, M Noad, and DC Cato, A portable matched field processing system using passive acoustic time synchronization, IEEE Oceanic Engineering, 31(3), 696-710 July 2006.

Gerstoft, P, CF Huang, and WS Hodgkiss, Estimation of transmission loss in the presence of geoacoustic inversion uncertainty, IEEE Oceanic Engineering, 31, 299-307, April 2006.

Huang, CF, P Gerstoft, and WS Hodgkiss, Uncertainty analysis in matched-field geoacoustic inversion, J. Acoust. Soc. Am, 119, 197-207, 2006.

Seismic noise can yield maps of Earth's crust, article in Science News 11 June 2005.

Roux, P, KG Sabra, P Gerstoft, WA Kuperman, and MC Fehler, P-waves from cross correlation of seismic noise, AGU Geophysical Research Letters, 32, L19303, doi:10.1029/2005GL023803, 2005.

Sabra, KG, P Gerstoft, P Roux, WA. Kuperman, and MC. Fehler, Surface wave tomography from microseisms in Southern California, AGU Geophysical Research Letters, 32, L14311, doi:10.1029/2005GL023155, 2005.

Sabra, KG, P Gerstoft, P Roux, WA Kuperman, and MC Fehler, Extracting time-domain Green's function estimates from ambient seismic noise, AGU Geophysical Research Letters, 32, L03310, doi:10.1029/2004GL021862, 2005.

Rogers, LT, M Jablecki, and P Gerstoft, Posterior distribution of a statistic of propagation loss estimated from radar sea clutter, Radar Science, Vol. 40, RS6005, doi:10.1029/2004RS003112, 2005.

Park, C, W Seong, and P Gerstoft, Geoacoustic inversion in time domain using ship of opportunity noise recorded on a horizontal array, J. Acoust. Soc . Am, 117, pp 1933-1941, 2005.

Gerstoft, P, WS Hodgkiss LT Rogers and M Jablecki, Probability distribution of low altitude propagation loss from radar sea-clutter data, Radio Science, 39, RS6006, doi:10.1029/2004/RS003077, 2004.

Battle, D, P Gerstoft, WS Hodgkiss, WA Kuperman, and PL Nielsen, Bayesian model selection applied to self-noise geoacoustic inversion, J. Acoust. Soc . Am, 116, pp 2043-2056, 2004.

Castor, K, P Gerstoft, P Roux, WA Kuperman, and BE McDonald Long range propagation of finite amplitude acoustic waves in an ocean waveguide, J. Acoust. Soc . Am, 116, pp 2004-2010, 2004.

Gerstoft, P, LT Rogers, WS Hodgkiss, and JL Krolik, Inversion for refractivity parameters from radar sea clutter, Radio Science, Vol 38(3), 8053, doi:10.1029/2002RS002640, 2003.

Gerstoft, P, LT Rogers, WS Hodgkiss, and LJ Wagner, Refractivity estimation using multiple elevation angles, IEEE J Oceanic Engineering, 28 (3), 513-525, 2003.

Gerstoft, P, WS Hodgkiss, WA Kuperman and HC Song, Phenomenological and global optimization inversion, IEEE J Oceanic Engineering, 28 (3), 342-354, July 2003.

Park, C, W Seong, P Gerstoft, and M Siderius, Timedomain geoacoustic inversion of high frequency chirps using a towed system, IEEE J Oceanic Engineering, 28 (3),468-478, July 2003.

Battle, D, P Gerstoft, WA Kuperman, WS Hodgkiss, and M Siderius, Geoacoustic inversion of tow-ship noise via near-field-matched-field processing, IEEE J. Oceanic Engineering, 28(3) , 456-467, 2003.

Nielsen, PL, M Siderius, and P Gerstoft, Range-dependent geoacoustic inversion: Results from the inversion techniques workshop, IEEE J Oceanic Engineering, 28 (3), 414-423, July 2003.

Siderius, M, PL Nielsen, and P Gerstoft, Performance comparison between vertical and horizontal arrays for geoacoustic inversion, IEEE J Oceanic Engineering (3), 424-431, July 2003.

Song, HC, WA Kuperman, WS Hodgkiss, P Gerstoft, and JS Kim, Null Broadening with Snapshot-deficient Covariance Matrices, IEEE J Oceanic Engineering, 28, 2003.

Gerstoft, P, WS Hodgkiss, WA Kuperman, HC Song, M Siderius, and PL Nielsen, Adaptive beamforming of a towed array during a turn, IEEE J Oceanic Engineering, 28, 44-54, Jan 2003.

Siderius, M, P Nielsen and P Gerstoft, Range-dependent seabed characterization by inversion of acoustic data from a towed receiver array," J. Acoust. Soc. Am., 112, pp. 1523-1535, 2002.

D'Spain,GL, GL Rovner, P Gerstoft, WA Kuperman, and WS Hodgkiss, Determination of waveguide invariance in general environments, U.S. Navy J. Underwater Acoustics 51(1), 123-142, 2002.

Gerstoft, P, GL D'Spain, WA Kuperman, and WS Hodgkiss, Calculating the waveguide invariant by ray-theoretic approaches, TM-468, Marine Physical Laboratory, University of California San Diego, 2001.

CF Mecklenbrauker and P Gerstoft, Objective functions for ocean acoustic inversion derived by likelihood methods, Journal of Computational Acoustics, 48(2), 259-270, 2000.

P Gerstoft, DF Gingras, LT Rogers and WS Hodgkiss, Estimation of radio refractivity structure using matched field array processing, IEEE J Antenna and Propagation 48, 345-356, 2000.

P Gerstoft, Assessment of Hydroacoustic Processing in the CTBT Release One Monitoring Software, International Data Center, Comprehensive Nuclear-Test-Ban Treaty Organization, Vienna, Austria, PTS/IDC-10 2000.

CF Mecklenbrauker, P Gerstoft, P.J. Chung, J.F. Bohme, Hypothesis testing for acoustic environmental models using likelihood ratio, J. Acoust. Soc. Am. 105, 1738--1748, 1999.

P Gerstoft and CF Mecklenbrauker, Ocean acoustic inversion with estimation of a posteriori probability distributions, J. Acoust. Soc. Am. 104, 808--819, 1998.

M Siderius, P Gerstoft and P Nielsen, Broadband geo-acoustic inversion from sparse data using genetic algorithms, Journal of Computational Acoustics 6, 117-134, Oct 1998.

P Ratilal, P Gerstoft and JT Goh, Subspace approach to inversion by genetic algorithms involving multiple frequencies, Journal of Computational Acoustics 6, 99-115 Oct 1998.

P Ratilal, P Gerstoft, YK Pong and JT Goh, Inversion of pressure data on a vertical array for seafloor geoacoustic properties, Journal of Computational Acoustics, 269-289, Oct 1998.