Abstract

The formula of van Rhijn, relating the observed airglow intensity at any zenith angle to the zenith airglow intensity and emission altitude, is shown to be valid for observations made from above an airglow layer as well as below it. It is shown that it is sufficiently accurate to neglect the effects of finite photometer field of view, and of finite thickness of the emitting layer, with the limits on these parameters encountered in practice. An orthogonal set of photometers may be used to determine vehicle attitude, or to map out airglow irregularities using an unstabilized satellite.

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