Install ftools-pow by entering the following commands in the terminal:
sudo apt update sudo apt install ftools-pow
Description:
Curve plotting and image display interface tool
POW is a curve plotting and image display interface tool written and distributed by the HEASARC at NASA/GSFC. . POW features a very flexible developer's interface and a "friendly" end user GUI interface. POW is a Tcl/Tk extension and can be called from standard C or FORTRAN main programs.
Homepage: https://heasarc.gsfc.nasa.gov/docs/software/lheasoft/ftools/fv/
Version: 5.4+dfsg-4
Section: universe/science