How different are the Liège and Hamburg atlases of the solar spectrum?

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Table 1

Summary of the basic atlas properties.

Parameter	Liège	Hamburg

Observatory	Jungfraujoch	Kitt Peak NSO
(Altitude)	(3580 m)	(2096 m)
Instrument	double-pass grating	FTS
Year span	1973–1988	≥1977, ≤1983
Wavel. range	3000–10 000 Å	3290–12 510 Å
λ/δλ	>500 000 (~216 000*)	up to 520 000
S/N at 630 nm	~6000*	~3000*
Avg. area	400′′ slit	circular, 5′′ ^a
Comments	very dry site	abs. intensities

Notes. Values are as given by the authors of the atlases. Values marked with an asterisk were determined in this work.

^(a)

Assumed in this work, actual value unknown, but ≤10′′.

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