Scattered Light Perpendicular to
	  the Dispersion in the FOS

A. Uomoto, W. P. flair, and A. F. Davidsen

Tue JOhfl8 Hopkins Uniuersiiy

Instrument Science Report eAL/Fos059
March 1989


ABSTRACT

Measurements of scattered light perpendicular to the FOS dispersion
axis are presented. The data were obtained through a variety of
apertures using many of the FOS dispersers during a March 1988
calibration session at Lockheed. The fraction of scattered ligbt
present l5OOj~& from the spectrum is always less than or about
0.3%. These results are nearly identica.l to a calibration report
presented by Lindler and Bohlin four years ago [1].