Source type:Seismic airgun arrays
Model output: Seismic airgun signatures
Description: AGORA is a Matlab model to calculate the source signatures of seismic airguns. AGORA solves the set of differential equations based on various branches of physics (Gilmore's equation of motion, incorporating liquid compressibility, mass transfer, thermal effects, and gas pressure laws.), which are calibrated by four calibration coefficients (based on a set of measurements for the different types of airguns). First, AGORA calculates the notional signature of each airgun. Next, the effect of the sea surface and the airguns' interactions in the array are taken into consideration. AGORA's first version is developed during a Ph.D. thesis at the Institute of Biology, Leiden University [1,2]. Then, its improvements for different purposes continued at TU Delft [3]. AGORA was used as a free model at Airgun Source Modelling Workshop in Dublin, 2016 [4]. Its performance is compared with other airgun source models in this workshop. It is a research model; thus, it is not responsible for commercial applications. More details related to this MATLAB model can be found in the references [1-4]. A detailed user-guide can be provided with the software upon request. The earlier versions of AGORA was shared from Ocean Acoustic Library (https://oalib-acoustics.org)
Examples: AGORA user interface helps to visualize array configuration and source signatures of each airgun.
Some screenshots from AGORA are shown.
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References:
[1] H.Ö. Sertlek, Aria of the Dutch North Sea, Ph.D. thesis, University of Leiden, 2016, [CrossRef].
[2] H.Ö. Sertlek, M. A. Ainslie, AGORA: Airgun source signature model: its application of seismic survey maps in the North Sea, UAC 2015, Crete, Greece [CrossRef].
[3] H.Ö. Sertlek, G. Blacquière, Calculation of the airgun source signatures for the rough sea surfaces, IEEE Journal of Ocean Engineering, Volume: 44, Issue: 3, July 2019 [CrossRef].
[1] H.Ö. Sertlek, Aria of the Dutch North Sea, Ph.D. thesis, University of Leiden, 2016, [CrossRef].
[2] H.Ö. Sertlek, M. A. Ainslie, AGORA: Airgun source signature model: its application of seismic survey maps in the North Sea, UAC 2015, Crete, Greece [CrossRef].
[3] H.Ö. Sertlek, G. Blacquière, Calculation of the airgun source signatures for the rough sea surfaces, IEEE Journal of Ocean Engineering, Volume: 44, Issue: 3, July 2019 [CrossRef].