vshifte arguments
 ioff =  0 nlon = 144 nlat =  72
 lsave =   608 lwork = 21024
 ier =  0
 least squares error 
 err2u =  0.373E-06 err2v =  0.335E-06
 vshifte arguments
 ioff =  1 nlon = 144 nlat =  72
 lsave =   608 lwork = 21024
 ier =  0
 least squares error 
 err2u =  0.548E-06 err2v =  0.445E-06