NSOAS24 is the global marine gravity anomaly model on a grid of 1′×1′, which is derived based on sea surface slopes from multi-satellite altimetry missions. Its spatial coverage is 80°S-80°N.
SDUST2021GRA is the global marine gravity anomaly model on a grid of 1′×1′, which is established from the altimeter data of Ka-band and Ku-band altimetry satellite including HY-2A. I
