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Earthshine blog

"Earthshine blog"

A blog about a telescopic system at the Mauna Loa Observatory on Hawaii to determine terrestrial albedo by earthshine observations. Feasible thanks to sheer determination.

JD2455857

Observing log Posted on Oct 22, 2011 05:01PM

Getting multi-band images of crescent Moon. Bands of thin clouds rolling past – vissible mainly as increased halo around Moon and in the eq. diff. images. T between 6 and 7 degrees C. Not very many failed frames.

Dawn started 5:45. by 5:55 sky-level was 445 – normally 397.

Time Level
6:00 505
6:02 530
6:04 930 – bias pattern starts to be seen
6:11 Earthshine side weaker than patterns in bias. Stopped.



JD2455856

Observing log Posted on Oct 22, 2011 10:37AM

Sky flats in the morning. Stopped when trailed stars were seen. VE1 flats ‘blotchy’ and strange.