2022, 14, x. https://doi.org/10.3390/xxxxx Academic Editor: Firstname Last- name Received: date Accepted: date Published: date Publisher’s Note: MDPI stays neu- tral with regard to jurisdictional claims in published maps and institu- tional affiliations.
What is the main difference (except of the terrestrial data over China) to other combined GFMs, such as XGM2016 or XGM2019? What is the main methodological difference and advantage of your method? Please comment on that question quantitatifely and qualitatively.