Open Access
Table 2.
Centre-to-limb variation at different altitudes.
| Altitude (H) | α/2 | γ | μ at α/2 |
|---|---|---|---|
| (km) | (deg) | (deg) | (cos γ) |
| 2000 | 42.83° | 42.98° | 0.732 |
| 5000 | 41.58° | 41.94° | 0.744 |
| 10 000 | 40.17° | 40.87° | 0.756 |
| 20 000 | 38.21° | 39.52° | 0.771 |
| 30 000 | 36.73° | 38.60° | 0.782 |
| 50 000 | 34.45° | 37.33° | 0.795 |
| 100 000 | 30.48° | 35.46° | 0.814 |
| 300 000 | 22.16° | 32.68° | 0.842 |
| 1RSun | 15.0° | 31.17° | 0.856 |
| 1 AU | 30.0° | 0.866 |
Notes. For a given altitude, we list the angle α/2 and the values of the angle γ and its cosine (μ) corresponding to the angle α/2.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.