Advanced

The Earthshine Telescope Project

Owner-Petersen, Mette LU ; Andersen, Torben LU ; Thejll, P.; Gleisner, H.; Ardeberg, Arne LU and Ulla, A. (2010) In Thalassas 26(2). p.119-128
Abstract
The Earthshine telescope project is a collaborative effort between Lund Observatory (LO) in Sweden and the Danish Meteorological Institute (DMI) with the purpose of constructing one or more robotic telescopes to record the albedo of the Earth over a long time. The objective is to measure long-term development of the global cloud cover and reflectivity for climate modeling. A 1% change in the Earth's albedo results in an average temperature change of 0.5 K which calls for high precision in the albedo measurements. This poses strict demands on the telescope design, in particular with respect to suppression of straylight. The paper describes our proposed optical and mechanical design of the Earthshine telescope, and presents a preliminary... (More)
The Earthshine telescope project is a collaborative effort between Lund Observatory (LO) in Sweden and the Danish Meteorological Institute (DMI) with the purpose of constructing one or more robotic telescopes to record the albedo of the Earth over a long time. The objective is to measure long-term development of the global cloud cover and reflectivity for climate modeling. A 1% change in the Earth's albedo results in an average temperature change of 0.5 K which calls for high precision in the albedo measurements. This poses strict demands on the telescope design, in particular with respect to suppression of straylight. The paper describes our proposed optical and mechanical design of the Earthshine telescope, and presents a preliminary straylight analysis of the design as well as first steps towards an 'error budget' for the system. Polarisation due to light-path folding could be an issue for the design being studied. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Earthshine, Telescopes, Climate
in
Thalassas
volume
26
issue
2
pages
119 - 128
publisher
University of Vigo
external identifiers
  • wos:000277922300009
  • scopus:77957075229
ISSN
0212-5919
language
English
LU publication?
yes
id
b998101e-bbc4-434e-9e02-1231117084a1 (old id 1617174)
alternative location
http://webs.uvigo.es/thalassas/thalassas_marco%20principal.htm
date added to LUP
2010-06-23 11:31:12
date last changed
2018-05-29 11:34:49
@article{b998101e-bbc4-434e-9e02-1231117084a1,
  abstract     = {The Earthshine telescope project is a collaborative effort between Lund Observatory (LO) in Sweden and the Danish Meteorological Institute (DMI) with the purpose of constructing one or more robotic telescopes to record the albedo of the Earth over a long time. The objective is to measure long-term development of the global cloud cover and reflectivity for climate modeling. A 1% change in the Earth's albedo results in an average temperature change of 0.5 K which calls for high precision in the albedo measurements. This poses strict demands on the telescope design, in particular with respect to suppression of straylight. The paper describes our proposed optical and mechanical design of the Earthshine telescope, and presents a preliminary straylight analysis of the design as well as first steps towards an 'error budget' for the system. Polarisation due to light-path folding could be an issue for the design being studied.},
  author       = {Owner-Petersen, Mette and Andersen, Torben and Thejll, P. and Gleisner, H. and Ardeberg, Arne and Ulla, A.},
  issn         = {0212-5919},
  keyword      = {Earthshine,Telescopes,Climate},
  language     = {eng},
  number       = {2},
  pages        = {119--128},
  publisher    = {University of Vigo},
  series       = {Thalassas},
  title        = {The Earthshine Telescope Project},
  volume       = {26},
  year         = {2010},
}