| DclInitSHT (SHTINT) | Initialize. | 
| DclDeallocSHT (----) | A workspace is released. | 
| DclGetSpectrumNumber (SHTNML) | Get housing location of spectrum data. | 
| DclOperateLaplacian (SHTLAP) | Laplacian is computed to spectrum data. | 
| DclSpectrumToGrid (SHTS2G) | Transform from spectrum data to grid data. | 
| DclGridToSpectrum (SHTG2W) | Transform from grid data to spectrum data. | 
| D clSpectrumToGridForWave (SHTWGM, SHTSGM, SHTSWM) | Transform from spectrum data to grid data. (Wave number designation) | 
| Dc lSpectrumToGridForZonal (SHTWGZ, SHTSGZ, SHTSWZ) | Transform from spectrum data to grid data. (A band state component) | 
| DclSp ectrumToGridForLatitude (SHTSGJ, SHTSWJ, SHTGJ) | Transform from spectrum data to grid data. (Latitude circle designation) | 
| DclGetLegendreFunctions (SHTFUN) | The calculation of associated Legendre function. | 
| DclLegendreTransform_F (SHTLFW) | Legendre positive conversion. | 
| DclLegendreTransform_B (SHTLBW) | Legendre Backward transformation. | 
*The corresponding f77 interface name in parentheses.