double yac_test_one(double lon, double lat)
double yac_test_ana_fcos(double lon, double lat)
double yac_test_func_deg(double lon, double lat)
double yac_test_harmonic(double lon, double lat)
double yac_test_vortex(double lon, double lat)
double yac_test_func(double lon, double lat)
double yac_test_ana_fcossin(double lon, double lat)
double yac_test_gulfstream(double lon, double lat)