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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.


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.

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:

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.