It came to our attention that in the paper of Tygel et al. (1996), formula (A-5) is incorrect. First, it is different from the cited equation (17) of Tygel et al. (1995). Second, the derivation of formula (17) in Appendix A of Tygel et al. (1995) is invalid for the purposes of Tygel et al., (1996) because in the 1995 paper, a rotation is treated, whereas in Tygel et al. (1996), a projection matrix is needed. Further investigation of the subject was needed to resolve these inconsistencies.