Improved the Accuracy of Seafloor Topography from Altimetry-Derived Gravity by the Topography Constraint Factor Weight Optimization Method

Gravity geologic method is one of the important to derive seafloor topography by using altimetry-gravity, and its committed step gridding regional gravity anomaly. Hence, we proposed a constraint factor weight optimization (TCFWO) based on ordinary kriging method. This fully considers influence factors construction grid besides horizontal distance. The results anomaly models constructed in Markus-Wake seamount area show that TCFWO better than Then, above two were applied invert topography. accuracy derived topographic was evaluated shipborne depth data existing models, including ETOPO1 V19.1 model. experimental ST_TCFWO (seafloor model inverted method) ST_KR Compared with ST_KR, has improved about 26%. In addition, affected variation depth, distribution control points type terrain. different layers, advantages ST_KR. sparse measurements area, V19.1, Moreover, compared other performs flat submarine plain or rugged area.