Automated Observations of the Earthshine

Goode, Philip R.; Shoumko, S.; Πάλλη, Ε.; Montañés-Rodŕıguez, P.

doi:10.1155/2010/963650

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…In 2005, a small dome dedicated to earthshine work was constructed near the main dome and a new, smaller semi-automated earthshine telescope was constructed, installed, and tested (Goode et al, 2010). The two telescopes were run simultaneously for calibration purposes from September 2006 through January 2007.…”

Section: Earthshine Observationsmentioning

confidence: 99%

Earth's Albedo 1998–2017 as Measured From Earthshine

Goode

Πάλλη

Shoumko

et al. 2021

Geophysical Research Letters

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The Earth's albedo (or reflectance) is the fraction of shortwave solar radiation that it reflects back to space. It is an essential determinant of the earth's climate, since, in the broadest sense, changes in climate arise from the simultaneous evolution of the solar intensity, the Earth's albedo, and greenhouse insulation.In the mid-1990's, the changing albedo was (and probably still is) the least understood of the three parameters (Houghton, 2000;IPCC, 2013). That uncertainty motivated our effort to measure of the earth's albedo continuously throughout at least one full solar cycle (two decades). The long data series would also help explore any correlations that might exist between varying solar activity and terrestrial reflectance (Gray et al.

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Section: Earthshine Observationsmentioning

confidence: 99%

Earth's Albedo 1998–2017 as Measured From Earthshine

Goode

Πάλλη

Shoumko

et al. 2021

Geophysical Research Letters

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“…Earthshine telescopes currently in use are strongly motivated by the design made at Big Bear Solar Observatory (Goode et al 2001(Goode et al , 2010 and collaborators. Telescopes of this type are currently operating from Tenerife and the Crimea.…”

Section: Introductionmentioning

confidence: 99%

The colour of the dark side of the Moon

Thejll¹,

Flynn

Gleisner³

et al. 2014

A&A

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Aims. "Earthshine" is the dim light seen on the otherwise dark side of the Moon, particularly when it is close to new. "Earthlight", or reflected sunlight from the Earth, is the source of Earthshine. Using B and V band CCD images of both the dark and bright sides of the Moon, we aim to estimate the Johnson photometry B − V colour of the Earthshine for the first time since the late 1960s. From these measurements we are also able to quantify the colour of Earthlight. Methods. We present images of the Moon taken with a small refractor in Hawaii, in B and V bands and taken under favourable conditions so that scattered light in both bands almost completely cancels, yielding a map of the surface in B − V colour. Co-addition of 100 such images taken in rapid succession substantially improves the signal-to-noise ratio, and several sources of photometric bias are eliminated by use of relative methods. Results. The earthlit dark side of the Moon is observed to be 0.150 ± 0.005 mag bluer in B − V than the sunlit bright side, in good agreement with the only known previous measurement of this quantity from 1967. Arguing on the basis of the change in B − V for sunlight reflected once off the Moon, we derive a colour for earthlight of B−V = 0.44±0.02 mag (without applying a small, uncertain, phase-dependent reddening correction). The absence of a colour-gradient in the B − V image implies that the scattering properties of the atmosphere+optical system are almost exactly matched in the two wavelength bands, the consequences of which are discussed.

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New Designs and Procedures in the Construction of Robotic Astronomical Observatories

Espartero¹

2020

SSRG-IJEEE

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Automated Observations of the Earthshine

Cited by 3 publications

References 10 publications

Earth's Albedo 1998–2017 as Measured From Earthshine

Earth's Albedo 1998–2017 as Measured From Earthshine

The colour of the dark side of the Moon

New Designs and Procedures in the Construction of Robotic Astronomical Observatories

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