TGF

The RTM technique is the main method to convert fine DEM into gravity field information, which relies on the numerical integration method in the airspace. The traditional airspace method has low computational efficiency and cannot meet the demand of fine DEM conversion. For this reason, we have developed an airspace method terrain gravity field solution system, TGF.

The TGF software system is a new MATLAB-based software suitable for solving the orthogonal model of the airspace method gravity field. It is able to compute 1) 10 gravity field functions generated by some arbitrarily shaped 3D geometries and mass density distributions, 2) different spectral information options including high frequency gravity modeling (also called residual terrain modeling or RTM) and full band terrain gravity field modeling, and 3) a combination of different ensemble models, i.e., polyhedra, prisms, tesseroids, and point masses. working models, an interactive mode with GUI interface and a batch mode without GUI interface. the TGF software achieves a computational efficiency of 10 points per second while guaranteeing mGal level accuracy. The software has important applications in the fields of fine gravity field solving, DD launch position all-weather, fast plumb deviation solving, etc.

Software download link: https://www.asg.ed.tum.de/iapg/forschung/schwerefeld/tgf/
 

Application examples of the high-frequency gravity field solver TGF in Switzerland and Slovakia

Related published results：
Yang M., Hirt C., Wu B., Deng X.L., Tsoulis D., Feng W.*, Wang C.Q., Zhong M.* (2022) Residual Terrain Modelling: The Harmonic Correction for Geoid Heights. Surveys in Geophysics, https://doi.org/10.1007/s10712-022-09694-4
Yang M., Hirt C., Pail R. (2020) TGF: A New MATLAB-based Software for Terrain Gravity Field Calculation. Remote Sensing, 12(7).
Hirt C., Yang M., Kuhn M., Bucha B., Kurzmann A., Pail R. et al. (2019) SRTM2gravity: an ultra-high resolution global model of gravimetric terrain corrections. Geophysical Research Letters, 46(9).
Bucha B., Hirt C., Yang M., Kuhn M., Rexer M. (2019) Residual terrain modelling (RTM) in terms of the cap-modified spectral technique: RTM from a new perspective. Journal of Geodesy, 93(2089-2108).