[Laser] Re: Lunar Eclipse #3
F1AVYopto at aol.com
F1AVYopto at aol.com
Sat Mar 1 19:10:27 EST 2008
Hi all
Remember the moon is a very poor albedo reflector.
The IR moon albedo map had been précised by the Clementine space orbiter.
In the visible part of the spectrum the properties are rather the same.
http://www.cmf.nrl.navy.mil/clementine/albedo.html
The best area is the Tycho crater (about 85 Km) and its associated ejectas.
(albedo 0,2)
The seas are very bad with less than 0,05 optical albedo.
To try to detect the street lights from the moon the target must be only the
Thyco crater and its ejectas.
This 200 Km area gives a small phase cancellation by curvature.
The reception has to be made by occular projection so the picture of the
moon is much bigger the photodetector area.
The brightest cities in Europe are not far the ones to the others and the
grids are synchronic.
The North of Europe bright area has also a small curvature.
I am certain theses curvatures combinations do not fully cancel all the 100
Hz components.
73 Yves F1AVY
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