The utilization of ghost reflections retrieved by seismic interferometry for layer-specific characterization of the shallow subsurface
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Description:

This folder contains five subfolders, each offering essential data and materials related to the research project on The utilization of ghost reflections retrieved by seismic interferometry for layer-specific characterization of the shallow subsurface, which was published on Near Surface Geophysics (https://doi.org/10.1002/nsg.12275)


1. subsurface_models:
all subsurface models as shown in Figure 4(i) in SU format.

2. Common_source_gathers
This folder contains all common source gathers for five subsurface models as shown in Figure 4(i). 

3. AC:
The results of seismic interferometry (SI) by auto-correlation (AC) for all subsurface models: a base subsurface model (S), a lateral change in the velocity of the second layer (L), a gradient change with depth in the velocity of the second layer (G), a thickness change in the second layer (T), and a 10% velocity change in the second layer (V). The notation 1 refers to the modelling with an absorbing boundary at the surface. 

(all) refers to retrieved results of SI by AC applied to active-source gathers
(Mute 2) refers to the SI results retrieved by AC applied to active-source gathers, in which events before the reflections from the bottom of the first layer and after the reflections from the bottom of the third layer are muted for the subsurface models.
(Mute 3) is the same as (Mute 2), but SI by AC is applied to active-source gathers, which we remuted before the reflections from the bottom of the first layer and after the reflection from the bottom of the second layer. 
These results are shown in Figure 4 of the paper

4. CC
Same as AC but for SI by cross-correlation, These results are shown in Figure B1 of the paper. 


5. codes
SI_autoCC.bash: a code for applying seismic interferometry by auto-correlation.
fdelmodc_layer.bash: a code for creating common-source gathers for each subsurface model. 
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Author:
Faezeh Shirmohammadi*
*Delft University of Technology, Faculty of Civil Engineering and Geosciences, Delft, Netherlands
March 2024