The main gravity function, geograv::GeoGrav and the definition of the geograv::Coeff class is in include/geograv.hpp
include/EGM96.hpp has the coefficients for the 360x360 egm96 model.
teensy_test is an arduino sketch to run on the teensy.
gravmodelgen.py is a python script to convert text files with coefficients to the c++ header files with coefficients.
main.cpp is a test file for running on desktop.
First install geographiclib: On mac you can just
brew install geographiclib
Then run
/usr/local/sbin/geographiclib-get-gravity all
to install all of the gravity models.
To run the tests,
First open terminal in the geograv directory, then run the following commands:
mkdir build
cd build
cmake ..
make
./TestGeoGrav
To generate new coefficient header files, use gravmodelgen.py, for example:
python gravmodelgen.py -f models/egm96 -n 360 -o include/EGM96.hpp -r 6378137.0 -u 0.3986004418e15
and
python gravmodelgen.py -f models/egm96 -n 20 -o include/EGM96_20.hpp -r 6378137.0 -u 0.3986004418e15