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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.

HD2455859

Observing log Posted on Oct 24, 2011 05:04PM

Strange ‘dragging’ on at least the VE1 images – and yes, readout drag is up-down, not right-left.

Many frame dropouts. Temp. is between 4 and 5 degrees C.

B and V perform well at this very almost new moon, but VE1 and VE2 seem to need boosting relative to the bluer bands.

Wait, the VE2 is fine – it is the VE1 that is too low, as if it, in particular, wants to stick.

Noting that the external view of the VYSOS-20 position is the best for detecting the coming of Dawn.

VERY little scattered light from the BS tonight – even at very high airmass.



The Sunglint

Links to sites and software Posted on Oct 24, 2011 01:47PM

This IDL code will create a map showing the Earth and the point on the surface where the sunglint travelled, as seen from the Moon, during a specified time interval.

test_sunglint.pro

Look in idl_tools/



Living Planet site

Links to sites and software Posted on Oct 24, 2011 12:02PM

Helps visualize the Earth as seen from the Moon at user-selectable times: http://www.fourmilab.ch/cgi-bin/Earth

We need to learn how to use this site for finding the ‘sunglint’ coordinates on Earth. We also should understand if the site can show the actual cloud cover at a given time.