The effects of the downward continuation approaches and the filtering amount on the precise local airborne geoid determination are discussed in detail.

The experiments proved: Several obvious advantages can be discovered,such as designing is more flexible,the approximate error is smaller and the design of zero moments under the same length of scaling filter is more flexible.

This paper completely gives parameterization for the scaling filter which was used by Belogay and Wang in the paper of Arbitrarily smooth orthogonal nonseparable wavelets in R2 to construct orthogonal nonseparable wavelets in R2.

This paper discusses the basic theory about 2-D sampling and2-D wavelet,on the basis of the sampling matrix D=111- ,We have obtained the parametric formula of non-separable compact-support orthognal scaling filter,using the property of low-pass and one -order vanishing moment.

As the codeword discriminability varies between different property parameters,we get the discrimination distribution upon different filter scales through a multi-run training phase,and modified the codebook content proportion for codeword at different filter scales,according to corresponding statistical distributions of discriminability.