La discussion par Kummer d’une quadrature sur la réfraction astronomique : commentaire historique
In an 1860 memoir, Kummer (1810–1893) discusses analytically the consequences of light rays’ quadrature in a spherically symmetrical medium. This fertile approach is illustrated here by showing its graphical translation using the Young–Kattawar diagram (1998). A detailed classification of occuring p...
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| Format: | Article |
| Language: | English |
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Académie des sciences
2023-02-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.118/ |
| Summary: | In an 1860 memoir, Kummer (1810–1893) discusses analytically the consequences of light rays’ quadrature in a spherically symmetrical medium. This fertile approach is illustrated here by showing its graphical translation using the Young–Kattawar diagram (1998). A detailed classification of occuring phenomena is derived for the case of vision through a steep inversion layer: e.g. hillingar and hafgerdingar effects, multiple horizons. These considerations help discussing the corrections which are essential for an accurate astronomical navigation, including horizon’s depression. |
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| ISSN: | 1878-1535 |