| Terrestrial albedo can be determined from ground-based observations
of Earthshine intensity, and used in climate change studies. The data
describe the mean albedo for a given viewing angle and constitute a
source of information independent to satellite observations. A new
Telescope system has been constructed and tested and we present it
here. The quality of terrestrial albedo data obtainable from such
Earthshine observations depend on the system properties, atmospheric
conditions and our ability to remove scattered light from the images
of the Moon. The system observes in four modes and these have different
characteristics in terms of the amount of scattered light they contain,
and the sensitivity to atmospheric properties. We present first results
that allow an inter-comparison of the four observing modes. |