This archive contains the degree 120 time-variable gravity field models over North China (110-130E, 20-50N), determined using the Slepian method and terrestrial-only gravity measurements from multiple campaigns from 2011 to 2013. The file NorthChina_study_area_boundary_lonlat.txt contains the coordinates of the points that define the boundary of the study area.
Taking the model file diff_2013_04-2012_03.txt as an example, it means the gravity differences between the two campaigns in April 2013 and March 2012. The gravity differences are in microgal (10^{-8} m/s^2), and the grid interval is 0.1 degree.
A paper documenting the determination of these models is in press.
Cite this dataset as: Han, J., Chen, S., Lu, H., & Xu, W. (2020). First release of the time-variable gravity model over North China (NC-IGP01T). (Version V1.0.2) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4295746
