- Presented geopotential solutions were obtained by inversion of precise GPS positions, for details see References.
- Maximum degree/order of the harmonic coefficients is 40; time-variable gravity field signal was identified to be significant up to degree/order 15 (for details please see below the paper Bezděk et al., 2016, and its supplementary material)
- These data are free for scientific use, please cite the references.
- Provided spherical harmonic coefficients are in the ICGEM format.
- To easily produce 2D/3D images and animations, see our free tool: MATLAB script for 3D visualizing geodata on a rotating globe
- Acronym "ASU" comes from "Astronomický ústav AV ČR" ("Astronomical Institute, Czech Academy of Sciences").
Updated monthly GPS gravity fields up to degree 40
Monthly GPS gravity fields for the 2016 paper
You can download GPS-based gravity fields that were used to produce Figures 1–3 in the following manuscript:
- Bezděk A, Sebera J, Encarnação J, Klokočník J, 2016. Time-variable gravity fields derived from GPS tracking of Swarm. Geophys. J. Int. 205, 1665–1669. http://dx.doi.org/10.1093/gji/ggw094
Monthly GPS gravity fields up to degree 40 (shown in Figure 1):
Monthly GPS gravity fields up to degree 15 (source data for Figures 2–3):
References
- Bezděk A, Sebera J, Klokočník J, Kostelecký J, 2014. Gravity field models from kinematic orbits of CHAMP, GRACE and GOCE satellites. Advances in Space Research 53, 412–429. http://dx.doi.org/10.1016/j.asr.2013.11.031
Pre-print available for download at Researchgate
- Bezděk A, Sebera J, Encarnação J, Klokočník J, 2016. Time-variable gravity fields derived from GPS tracking of Swarm. Geophys. J. Int. 205, 1665–1669. http://dx.doi.org/10.1093/gji/ggw094
Paper+supplementary material available for download at Researchgate