:: Generate a prism model from a tesseroid model.
:: Prisms will have the same mass as the tesseroids and
:: associated spherical coordinates of the center of
:: the top of the tesseroid.

tess2prism.exe < tess-model.txt > prism-model.txt

:: Generate a regular grid in spherical coordinates,
:: pipe the grid to the computation programs,
:: and dump the result on output.txt
:: prismpots calculates the potential in spherical
:: coordinates, prismgs calculates the full
:: gravity vector, and prismggts calculates the full
:: gravity gradient tensor.

tessgrd -r-160/0/-80/0 -b100/100 -z250e03 | ^
prismpots prism-model.txt | ^
prismgs prism-model.txt | ^
prismggts prism-model.txt -v > output.txt