References

Sandwell1987

Sandwell, D. T. (1987). Biharmonic spline interpolation of GEOS-3 and SEASAT altimeter data. Geophysical Research Letters, 14(2), 139–142. https://doi.org/10.1029/GL014i002p00139

SandwellWessel2016

Sandwell, D. T., & Wessel, P. (2016). Interpolation of 2-D vector data using constraints from elasticity. Geophysical Research Letters, 43(20), 2016GL070340. https://doi.org/10.1002/2016GL070340