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Calibration of Meteor Cameras
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2024 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Kalibrering av meteorkameror (Swedish)
Abstract [en]

Meteors are caused by particles from space that enter the Earth's atmoshphere with very high speeds. In order to better understand the meteor phenomenon, meteor cameras have been put up around the world in large networks. These cameras continuously monitor the sky in order to capture any meteors on film. To get information about the origin of the particles that cause the meteor phenomenon, these cameras need to be calibrated. With a good calibration we can determine where in the sky the meteor appeared, and its trajectory through the atmosphere. A software library has been developed for performing automatic astrometric calibrations of these cameras. It works by pairing stars in the image with known positions of stars from a star catalogue. The library has integrated various existing calibration methods in order to evaluate and compare them. Three methods were chosen and calibrations were performed on a number of different images from existing camera stations. We provide results and analysis of each method and give a measure of their accuracy and reliability. We found that the calibration method bundled with the camera used for the thesis gave substantial residuals, while the methods in use by the Norwegian Meteor Network, as well as the one in use by the Global Meteor Network gave accurate positions across the tested calibration images.

Abstract [sv]

Meteorer orsakas av partiklar från rymden som i hög hastighet kommer in i jordens atmosfär. För att bättre kunna förstå meteorfenomenet har meteorkameror satts upp i nätverk över hela världen. Dessa kameror övervakar ständigt himlen för att fånga eventuella meteorer på film. För att kunna få ut information om ursprunget av de partiklar som orsakar meteorfenomenet behöver kamerorna kalibreras. Med en god kalibrering kan meteorernas position på himlen tas fram, och i förlängningen deras banor genom atmosfären. I detta projekt har ett mjukvarubibliotek för att automatiskt utföra astrometriska kalibreringar tagits fram. Det fungerar genom att para ihop stjärnor i bilden med kända positioner från en stjärnkatalog. Detta bibliotek integrerar ett antal existerande kalibreringsmetoder för att utvärdera och jämföra dem. Tre metoder valdes ut och kalibreringar utfördes på ett antal bilder från existerande kamerastationer. Resultat och analys av deras precision och stabilitet presenteras. Den metod som finns inbyggd på kamerastationen som har använts i detta projekt visade sig ge stora fel, medan de metoder som används av det Norska Meteornätverket och Global Meteor Network gav precisa positioner på alla testbilder.

Place, publisher, year, edition, pages
2024. , p. 40
Series
FYSAST ; FYSKAND1190
Keywords [en]
astronomy, meteors
Keywords [sv]
astronomi, meteorer
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-534421OAI: oai:DiVA.org:uu-534421DiVA, id: diva2:1881881
Supervisors
Examiners
Available from: 2024-08-08 Created: 2024-07-04 Last updated: 2024-08-08Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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