Validity of anomalous diffraction approximation in myx domain

w In a recent paper, Liu et al. Liu, C., Jonas, P.R., Saunders, C.P.R., 1996. Accuracy of the anomalous diffraction approximation to the light scattering by column-like ice crystals. Atmos. x Ž . Res. 41, 63–69 reported that the anomalous diffraction approximation ADA accuracy is not < < sensitive to van de Hulst’s condition my1 1, but is dependent on the size parameter x . w Videen and Chylek Videen, G., Chylek, P., 1998. Anomalous diffraction approximation limits. ́ ́ x Atmos. Res., this issue pointed out that this result is at odds with previous research, and their < < results indicated that the accuracy of ADA is much dependent on the condition of my1 1. Some calculated results are presented here to provide further discussion of the ADA validity in the calculation of particle extinction and absorption efficiencies. q 1998 Elsevier Science B.V. All rights reserved.