There was a bug that caused the reference to be one range coordinate
smaller than the actual result.
The cause was that the csv file for `actual` had a header
but the file for `reference` doesn't.
This difference needs to be taken into account when reading the files.
Before this commit, the first row of data is interpreted as the
column names for the reference, thus reducing the data content by one
row.

Reflectivity Maps for multiple bounce are not yet generated.