IRTF data from the 1989 28 Sgr occultation by Saturn's rings.
Citation
French, R.G., P.D. Nicholson, and M.K. Gordon, Radial Profiles of
Saturn's Rings from the IRTF Observations of the 1989
Occultation of 28 Sgr, IRTF-SR-URAC-4- OCC-V1.0,
USA_NASA_PDS_EBROCC_0001, NASA Planetary Data System, 2003.