University of Tehran Press Journal of the Earth and Space Physics 2538-371X 33 1 2007 04 21 - - 18540 FA Journal Article This paper deals with the one-dimensional discrete wavelet transform (1D DWT) of four scaling coefficients are computed numerically by designing a convolutive operator. The near-zone contribution of the integral is calculated through wavelet transform and for the far-zone contribution the classic expansion of the spherical harmonics applied. Finally the geoidal heights are determined over a territory in Canada. This paper deals with the one-dimensional discrete wavelet transform (1D DWT) of four scaling coefficients are computed numerically by designing a convolutive operator. The near-zone contribution of the integral is calculated through wavelet transform and for the far-zone contribution the classic expansion of the spherical harmonics applied. Finally the geoidal heights are determined over a territory in Canada. https://jesphys.ut.ac.ir/article_18540_3308c5f83a73a5b9effdc8caffa4afcc.pdf