ANOMALOUS DIFFRACTION APPROXIMATION LIMITS

It has been reported in a recent article [Liu, C., Jonas, P.R., Saunde rs, C.P.R., 1996. Accuracy of the anomalous diffraction approximation to light scattering by column-like ice crystals. Atmos. Res., 41, pp. 63-69] that the anomalous diffraction approximation (ADA) accuracy doe s not depend on particle refractive index, but instead is dependent on the particle size parameter. Since this is at odds with previous rese arch, we thought these results warranted further discussion. (C) 1998 Elsevier Science B.V. All rights reserved.