Abstract
method
~2 and ~ 6 cm in the former and latter cases, respectively. Moreover, we optimized the vertical GNSS-A positioning errors by considering the uncertainty of a reference SSP and other error sources, and the optimization of the vertical GNSS-A positioning errors was more reasonable than the conventional error evaluation. Although this study focused on the uncertainty of a reference SSP, it is important to carefully evaluate various other systematic error sources to precisely detect vertical seafloor motion.