An improved calibration of satellite altimetric heights using tide gauge sea levels with adjustment for land motion (pnas.org)
But concerning the ocean heat uptake, have you some confidence in altimetric sea level measurement? (realclimate.org)
Willis et al. (2004) used satellite altimetric height combined with about 900,000 in situ ocean temperature profiles to produce global estimates of upper - ocean (upper 750 m) heat content on interannual timescales from mid-1993 to 2002 (see Figure 4 - 3). (nap.edu)