BACKSCATTER ULTRAVIOLET (BUV) INSTRUMENT DATA
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This instrument, a spare from the Nimbus 7 program, was only flown
on AE-E. The instrument is described in 

	Extreme solar ultraviolet monitor (esum) for atmosphere
	explorer, Ball Bros. Res. Corp., NASA CR-144766, Boulder, 
	Colorado, April 1976

and results were presented in 

	Heath, D.F., and Gilson, B.R., Relative EUV solar flux
	measured by the ESUM experiment on AE-5, NASA-GSFC,
	CSC/TM-79/6310, Greenbelt, Maryland, December 1979. 

Using a tandem Ebert-Fastie double monochromator and an interference
filter photometer channel, the BUV instrument measured the UV radiation
reflected back from earth to space at 12 wavelengths from 2550 A to 3400 A.
From these measurements the ozone mixing ratios at atmospheric pressure 
levels from 0.4 mB to 30 mB were deduced. The UA file includes 7 BUV
parameters: the ozone mixing ratios at 0.4, 1, 2, 5, 10, and 30 mB, and
the total ozone density (a brief description of the BUV instrument can
be found in the AE_E.TXT file).