Applying double-difference methods for fine-scale acoustic tracking of controlled sources and sperm whales using a small aperture vertical array

2016 ◽  
Vol 139 (4) ◽  
pp. 2172-2172
Author(s):  
Ludovic Tenorio-Hallé ◽  
Aaron M. Thode ◽  
Jit Sarkar ◽  
Chris Verlinden ◽  
Jeffrey D. Tippmann ◽  
...  
Keyword(s):  
Double Difference ◽  
Fine Scale ◽  
Sperm Whales ◽  
Vertical Array ◽  
Acoustic Tracking ◽  
Small Aperture ◽  
Difference Methods

Applying double-difference methods for fine-scale acoustic tracking using a short aperture vertical array

2016 ◽  
Vol 140 (4) ◽  
pp. 2950-2950
Author(s):  
Ludovic Tenorio-Hallé ◽  
Aaron M. Thode ◽  
Jit Sarkar ◽  
Chris Verlinden ◽  
Jeffrey Tippmann ◽  
...  
Keyword(s):  
Double Difference ◽  
Fine Scale ◽  
Vertical Array ◽  
Acoustic Tracking ◽  
Difference Methods

scholarly journals Acoustic tracking of sperm whales in the Gulf of Alaska using a two-element vertical array and tags

2013 ◽  
Vol 134 (3) ◽  
pp. 2446-2461 ◽  
Author(s):  
Delphine Mathias ◽  
Aaron M. Thode ◽  
Jan Straley ◽  
Russel D. Andrews
Keyword(s):  
Gulf Of Alaska ◽  
Sperm Whales ◽  
Vertical Array ◽  
Acoustic Tracking

A double-difference method for high-resolution acoustic tracking using a deep-water vertical array

2017 ◽  
Vol 142 (6) ◽  
pp. 3474-3485
Author(s):  
Ludovic Tenorio-Hallé ◽  
Aaron M. Thode ◽  
Jit Sarkar ◽  
Christopher Verlinden ◽  
Jeffrey Tippmann ◽  
...  
Keyword(s):  
High Resolution ◽  
Deep Water ◽  
Difference Method ◽  
Double Difference ◽  
Vertical Array ◽  
Acoustic Tracking

scholarly journals Sentinel-3 Microwave Radiometers: Instrument Description, Calibration and Geophysical Products Performances

2020 ◽  
Vol 12 (16) ◽  
pp. 2590 ◽  
Author(s):  
Marie-Laure Frery ◽  
Mathilde Siméon ◽  
Christophe Goldstein ◽  
Pierre Féménias ◽  
Franck Borde ◽  
...  
Keyword(s):  
Microwave Radiometer ◽  
Instrument Design ◽  
Sea Surface ◽  
Double Difference ◽  
Path Delay ◽  
Vicarious Calibration ◽  
Difference Methods ◽  
Two Parameters ◽  
Microwave Radiometers ◽  
Single Instrument

Copernicus Sentinel-3 Surface Topography Mission embarks a two-channel microwave radiometer combined with the altimeter in order to correct the altimeter range for the excess path delay resulting from the presence of water vapour in the troposphere. The in-flight calibration of a single instrument is the critical point to achieve the expected performances. In the context of a constellation, the inter-calibration is even more important. After a presentation of the instrument design, we present the diagnoses used for the calibration of Sentinel-3A, using vicarious calibration over specific areas and double difference methods. The inter-calibration of Sentinel-3B with Sentinel-3A is performed during the tandem phase, using the residual differences of co-located measurements. Finally performances are assessed at crossover points with two parameters, first the wet troposphere correction by comparison with Jason-3; secondly on the Sea Surface Height by difference of variance. Analysis results have shown that Sentinel-3A is well calibrated, consistent with other instruments, and that Sentinel-3B is calibrated within 0.4 K with Sentinel-3A as a reference. Performances and stability fulfill the requirements for both missions.

Fine-scale Relocation of Aftershocks of the 22 February Mw 6.2 Christchurch Earthquake using Double-difference Tomography

2011 ◽  
Vol 82 (6) ◽  
pp. 839-845 ◽  
Author(s):  
S. Bannister ◽  
B. Fry ◽  
M. Reyners ◽  
J. Ristau ◽  
H. Zhang
Keyword(s):  
Double Difference ◽  
Fine Scale

Experimental Result of AUV-based Acoustic Tracking System of Sperm Whales

2006 ◽  
Author(s):  
Tamaki Ura ◽  
Junichi Kojima ◽  
Tsuyoshi Nakano ◽  
Harumi Sugimatus ◽  
Kyoichi Mori ◽  
...  
Keyword(s):  
Tracking System ◽  
Experimental Result ◽  
Sperm Whales ◽  
Acoustic Tracking

Fine‐scale habitat use of foraging sperm whales is driven by seafloor topography and water column structure

2021 ◽  
Author(s):  
Marta Guerra ◽  
Stephen M. Dawson ◽  
Tamlyn R. Somerford ◽  
Elizabeth Slooten ◽  
William J. Rayment
Keyword(s):  
Habitat Use ◽  
Water Column ◽  
Fine Scale ◽  
Sperm Whales ◽  
Seafloor Topography ◽  
Column Structure

Picking versus stacking in a modern microearthquake location: Comparison of results from a surface passive seismic monitoring array in Oklahoma

Geophysics ◽  
2014 ◽  
Vol 79 (6) ◽  
pp. KS61-KS68 ◽  
Author(s):  
Jeremy D. Pesicek ◽  
Duncan Child ◽  
Brad Artman ◽  
Konrad Cieślik
Keyword(s):  
Monitoring Network ◽  
Seismic Monitoring ◽  
Precise Determination ◽  
Double Difference ◽  
Spatial And Temporal Patterns ◽  
Small Aperture ◽  
Event Location ◽  
Passive Seismic ◽  
Velocity Information ◽  
Favorable Conditions

We present location results for a group of [Formula: see text] microearthquakes that occurred in 2012 in a region of Oklahoma hosting ongoing exploration activities. Using a local passive surface seismic monitoring network of 15 broadband stations, we applied two modern location techniques that use fundamentally different approaches. The first is a pick-based double-difference relocation method with waveform crosscorrelation. Multiple-event location techniques such as these are generally regarded as the best approach for obtaining high-precision locations from pick data. The second approach is an automated waveform migration stacking method. These types of methods are becoming increasingly common due to increasing network station density and computer power. The results from the two methods show excellent agreement and provide similar results for the interpreter. Both methods reveal spatial and temporal patterns in the locations that are not visible in results obtained using a more traditional pick-based approach. We performed two statistical uncertainty tests to assess the effects of data quality and quantity on the two methods. We show that the uncertainties for both methods are comparable, but that the stack-based locations are less sensitive to station geometry, likely due to the different treatment of outliers and the beneficial inclusion of noisier data. Finally, we discuss the favorable conditions in which to apply each method and argue that for small aperture surface arrays where accurate velocity information exists, such as in this study, the stack-based method is preferable due to the higher degree of automation. Under these conditions, stack-based methods better allow for rapid and precise determination of microearthquake locations, facilitating improved interpretations of seismogenic processes.

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