Sökning: "Observatory"

Visar resultat 1 - 5 av 20 uppsatser innehållade ordet Observatory.

1. 1. Photometric Characterization of the Earthshine Telescope

   Master-uppsats, Lunds universitet/Astronomi; Lunds universitet/Institutionen för astronomi och teoretisk fysik

   Författare :Henriette Schwarz; [2012]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : Uncertainties in determination of the Earth’s albedo currently limit our understanding of climate and climate change. A new telescope has been designed and built in collaboration between Danish Meteorological Institute and Lund Observatory to study the ratio between the intensities of earthshine to moonlight. LÄS MER

3. 2. Evaluation of environmental stresses on GNSS-monuments

   H-uppsats, Chalmers tekniska högskola/Institutionen för rymd- och geovetenskap

   Författare :Wolfgang Lehner; [2011]
   Nyckelord :;

   Sammanfattning : The aim of this thesis is to analyze four different constructions of GNSS-antenna monuments with respect to deformations due to solar radiation, temperature variations and wind. It was commissioned by Lantmäteriet, the Swedish mapping, cadastral and land registration authority and realized in cooperation between Vienna University of Technology and Chalmers University of Technology. LÄS MER

4. 3. Design of a beam switch for the mm-wave receiver at Onsala Space Observatory

   M-uppsats, Chalmers tekniska högskola/Institutionen för rymd- och geovetenskap

   Författare :Christian Olsson; [2011]
   Nyckelord :Beam; switch; Onsala; Beamswitch; Blanking; Telescope; Mekatronik; Space; Observatory; Mirror; Subreflector; GARD;

   Sammanfattning : Ground-based astronomical observations at millimetre wavelengths are very challenging due to the strong influence of the rapidly fluctuating water content in the Earth's atmosphere. Calibration to compensate for atmospheric disturbances and also to the receiver’s limited stability is done by switching rapidly between the source under observation and cold space. LÄS MER

5. 4. A 3 m Class Telescope with Active and Adaptive Optics. With special regard to the Iranian National Observatory

   Master-uppsats, Lunds universitet/Astronomi

   Författare :Majid Ale Ebrahim; [2011]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : A 3m ground-based optical telescope, with active and adaptive optics, is a powerful and versatile research tool. This type of telescopes is affordable and manageable also for communities with limited previous telescope experience. LÄS MER

7. 5. Spectral analysis of Ca I

   Kandidat-uppsats, Lunds universitet/Astronomi

   Författare :Ellinor Andersson; [2011]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : In this project spectra of neutral calcium between 2000-30000 cm-1 have been recorded by the Fourier Transform Spectrometer Bruker HR IRFTS at Lund Observatory. Using 204 spectral lines, 78 energy levels in the calcium atom have been derived. Level mixing and self absorption of some transitions are discussed. LÄS MER