This paper is about adding a further layer of correction to earthshine measurements and therefore albedo determination by terrestrial based observations.
Influence of celestial light on lunar surface brightness determinations: Application to earthshine studies
P. Thejll, H. Gleisner, C. Flynn
A&A 573 A131 (2015)
(open access with registration)
Aims. We consider the influence of celestial-sphere brightness on determinations of terrestrial albedo from earthshine intensity
measurements. In particular, the contributions from zodiacal light and starlight are considered.
Results. We find that celestial-sphere surface brightness can be so large that a considerable and unacceptable error level would have
an impact on half of typical earthshine-based albedo-determinations if left unaccounted for. Considering the empirical uncertainty on
ZL, we show that almost all our earthshine data can be used if a sky correction is made. In real observations we find up to a 1% effect
on albedo results of correcting for the celestial brightness.