TesserACT helps users design 3D seismic surveys that deliver the desired spatial sampling. In areas of complex geology, many users want to go further, and confirm that their survey design achieves specific imaging objectives.

TesserACT operational analysis delivers information about the cost of each source and receiver. This information can be combined with the results of an illumination study to estimate the value of information of every source and receiver on the survey, ensuring that your investment in seismic data delivers the maximum return on investment.

- Wave equation modeling in the space-frequency domain is the basis for computations of illumination cubes, which can be used to extract source illumination amplitudes along any given horizon in the x,y,z space of the velocity-depth model.
- A given cube is calculated for a
*single frequency*with sources on a surface grid spanning the survey area. At any given x,y,z location in the output cube, the illumination amplitude is estimated as a sum of amplitude contributions from all the shots arriving at that point. An illumination amplitude is therefore an average of energy contributions from all individual shots, weighted by their respective distances. Normal incidence paths get the biggest weight. - A given frequency illumination cube provides therefore information about the geometrical focusing and defocusing effects of the velocity-depth model only, on distribution of energy at that frequency from a grid of sources at the surface.