|   | 3.2.3 | 
| Data Fields | |
| int | N_total | 
| Total number of Fourier coefficients. | |
| int | M_total | 
| Total number of samples. | |
| fftwf_complex * | f_hat | 
| Vector of Fourier coefficients, size is N_total * sizeof( fftwf_complex ) | |
| fftwf_complex * | f | 
| Vector of samples, size is M_total * sizeof( fftwf_complex ) | |
| void(* | mv_trafo )(void *) | 
| Pointer to the own transform. | |
| void(* | mv_adjoint )(void *) | 
| Pointer to the own adjoint. | |
| int | N | 
| the bandwidth   | |
| float * | x | 
| the nodes ![$\mathbf{x}(m) = \left(x_1,x_2\right) \in [-\frac{1}{2},\frac{1}{2}) \times [0,\frac{1}{2}]$](form_6.png) for  ,   | |
| int | t | 
| the logarithm of NPT with respect to the basis 2 | |
| unsigned int | flags | 
| the planner flags | |
| nfftf_plan | plan_nfft | 
| the internal NFFT plan | |
| fftwf_complex * | f_hat_intern | 
| Internally used pointer to spherical Fourier coefficients. | |
| double | MEASURE_TIME_t [3] | 
| Measured time for each step if MEASURE_TIME is set. | |