sshifte arguments
 ioff =  0 nlon = 144 nlat =  72
 lsave =   608 lwork = 21024
 ier =  0
 least squares error =  0.479E-06
 sshifte arguments
 ioff =  1 nlon = 144 nlat =  72
 lsave =   608 lwork = 21024
 ier =  0
 least squares error =  0.667E-06