A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert Bernecky
Date: 2017 May 15, 05:49 -0700
You can try Octave (duplicates Matlab functionality)
Octave/Matlab is a scientific programming language, and takes time to master.
The idea would be to enter the data, use polyfit to fit a least-squares parabola through the data, (and polyval to generate the points on the curve). See the attached for what it might look like.