nvuint, nvlint

an array containing the number of points at which to uniformly re-sample the upper and lower layer velocities specified in the arrays ivuint and ivlint, respectively; if nvuint=1 or nvlint=1, the average upper or lower layer velocity is calculated; if nvuint or nvlint equals the current number of upper or lower velocity points, no re-sampling is performed (default: none; however, the default is the first element of nvuint and nvlint for all layers if only one value is specified)