Ricker resolution criterion
Ricker's resolution criterion (1953) states that a bed, represented by two reflection co-efficients of equal sign and magnitude, reaches the limit of resolvability when its thickness approaches an interval where the composite waveform has a zero curvature (flat spot) at its central maximum.
This limit is also referred to as temporal resolution and can be obtained by differentiating the convolving source wavelet twice. For Ricker wavelets, the resolution limit can be approximated by the wavelength lambda of the pre-dominant frequency: λ/4.62.
In contrast to the Rayleigh criterion, the Ricker criterion is based on a reflector model and requires the reflection co-efficients to be isolated.
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