There are three files of supplementary material consisting of edited fit files 
which were generated by SPFIT. One file has as basis ab initio energies of H2D+, 
one file experimental rotational data of H2D+, and one experimental rotational 
data of D2H+.

Each file has some introductory notes, the title line of the fit with the data, 
characteristics of the fit and one line with abbreviated information.

Followed by the lines: 
number: J', Ka', Kc', J'', Ka'', Kc'';
after several blanks, experimental and calculated frequencies follow with residuals, 
uncertainties, and 0.0000000.

J'' = -1 signals the information refers to an energy.
frequencies and uncertainties are in megahertz or in incers centimeters; 
the latter is indicated by a negative uncertainty.

The determined parameters follow next; for each line: 
number, parameter identifier, meaning of the parameter in a Watson-type Hamiltonian, 
value with uncertainty (1sigma) in megahertz units, and change in this iteration 
(none or essentially none signals convergence).

The first four parameters are the Euler coefficients, which are adjusted separately 
from the usual fitting procedure.

Parameter identifiers 90ij00 refer to X_ij, 92ij00 refer to Y_ij.

MW and IR average deviations and absolute rms values along with the rms error follow.

Correlation matrix follows and finally the title line again.