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Astronomical seeing conditions as determined by turbulence modelling and optical measurement
Dissertation (MSc)--University of Pretoria, 2012.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613445995626496 |
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| access_status_str | Open Access |
| author2 | Djolov, George D. |
| author_browse | Djolov, George D. |
| author_facet | Djolov, George D. |
| collection | Thesis |
| dc_rights_str_mv | © 2012 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria |
| description | Dissertation (MSc)--University of Pretoria, 2012. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/28328 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:14.878Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/28328 Astronomical seeing conditions as determined by turbulence modelling and optical measurement Djolov, George D. marisa@hartrao.ac.za Combrinck, Ludwig Nickola, Marisa Llr Lunar laser ranging Seeing monitor Large eddy simulation Astronomical seeing Optical turbulence UCTD Dissertation (MSc)--University of Pretoria, 2012. Modern space geodetic techniques are required to provide measurements of millimetre-level accuracy. A new fundamental space geodetic observatory for South Africa has been proposed. It will house state-of-the-art equipment in a location that guarantees optimal scientific output. Lunar Laser Ranging (LLR) is one of the space geodetic techniques to be hosted on-site. This technique requires optical (or so-called astronomical) seeing conditions, which allow for the propagation of a laser beam through the atmosphere without excessive beam degradation. The seeing must be at ~ 1 arc second resolution level for LLR to deliver usable ranging data. To establish the LLR system at the most suitable site and most suitable on-site location, site characterisation should include a description of the optical seeing conditions. Atmospheric turbulence in the planetary boundary layer (PBL) contributes significantly to the degradation of optical seeing quality. To evaluate astronomical seeing conditions at a site, a two-sided approach is considered – on the one hand, the use of a turbulence-resolving numerical model, the Large Eddy Simulation NERSC (Nansen Environmental and Remote Sensing Centre) Improved Code (LESNIC) to simulate seeing results, while, on the other hand, obtaining quantitative seeing measurements with a seeing monitor that has been developed in-house. Geography, Geoinformatics and Meteorology MSc Unrestricted 2013-09-07T13:19:35Z 2013-04-25 2013-09-07T13:19:35Z 2013-04-17 2012 2013-02-12 Dissertation Nickola, M 2012, Astronomical seeing conditions as determined by turbulence modelling and optical measurement, MSc Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/28328> C13/4/107/gm http://hdl.handle.net/2263/28328 http://upetd.up.ac.za/thesis/available/etd-02122013-155548/ © 2012 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Llr Lunar laser ranging Seeing monitor Large eddy simulation Astronomical seeing Optical turbulence UCTD Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title | Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title_full | Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title_fullStr | Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title_full_unstemmed | Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title_short | Astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| title_sort | astronomical seeing conditions as determined by turbulence modelling and optical measurement |
| topic | Llr Lunar laser ranging Seeing monitor Large eddy simulation Astronomical seeing Optical turbulence UCTD |
| url | http://hdl.handle.net/2263/28328 http://upetd.up.ac.za/thesis/available/etd-02122013-155548/ |