Free Access

Table 1

Total refracted angles αrefr for rays at 0.55 μm entering the atmosphere with an impact radius rb.

rb − Rß ν λ    =    0.55   μm H atm α refr
[km] [km] [arcsec]

55 2.12  ×  10-4 6.6 3794 3444
60 1.09  ×  10-4 5.6 2048 1852
70 1.82  ×  10-5 5.0 325 328
80 2.56  ×  10-6 4.5 45 48
90 2.65  ×  10-7 3.8 5.1 5.5
100 1.91  ×  10-8 3.8 0.45 0.39
110 1.47  ×  10-9 4.1 0.036 0.029
120 1.26  ×  10-10 4.3 0.0030 0.0024

Notes. For comparison, is the refracted angle for an isothermal atmosphere of refractivity νλ    =    0.55   μm and scale height Hatm (Baum & Code 1953).

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.