Reading.py module mis-calculates ordinates from absolutes and baselines
The method get_ordinates() in
/geomagio/residual/Reading.py
mis-calculates e_ord and h_ord. Here is what they should be:
e_ord = h_abs * np.sin(np.radians(d_ord))
h_ord = np.sqrt(h_abs**2 - e_ord**2) - h_bas
This small change will break several unit tests in adjusted_tests.py, so update these as well.