File names are in the form:
observation date followed by serial number, followed by file extension
.fits, as in
YYMMDD.NNN.fits prior to the year 2000 and
The following files are échelle spectra of Mars with the 8th aperture centered around 8700 Angstroms. The resolving power is R = 50,000 rather than the usual 26,000 for these spectra.
Right click on link to download desired file.
Below are two sample files.
The following compressed files contain all 98 Ritter spectra of Mars.