"CSIM" can calculate the sensitivity of the collimator, the geometric and penetrating photon ratios, and the 1D and 2D point source response functions (PSF) with the statistical uncertainty for different hole shapes (e.g. square, hexagonal, and cylindrical).
The steering vector is the spatial point source response of the medium (Green's function), thus depending on not only the source location but also the environmental parameters.
We validate our results by using the estimated point spread functions to deblur several images of natural scenes and by direct comparison with a point source response.
Our methodology was applied in a context where there was no practical alternative for estimating the PSF using direct measurement of a point source response.
The idea was to let this ball approximate a "point source" and use its response for a direct estimation of the PSF shape.
Sensor response of an SRM needed for deconvolution can be accurately estimated through repeated measurements of a magnetic point source and prepared as a response file readable by UDECON (see "Acquisition and preparation of magnetometer sensor response" section).
In order to acquire reliable sensor response suitable for deconvolution, high-resolution (e.g., every 1-mm interval) measurements of a magnetic point source over the possible sensor response interval (e.g., 40 cm) along the track are needed (Oda and Xuan 2014).
Traditionally used sources offer either high power and flat frequency response, but limited omnidirectionality, or excellent point source characteristics with very irregular frequency response and limited power.
Risk-benefit analyses are based on an aerosolized, point source, overt attack, for which response can begin almost immediately.
