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Table 6

Mean abundances ӯi and associated uncertainty factors F(ӯi) for the main atmospheric species.

Species Altitude [km] ӯi F (ӯi)
N2 1026 7.8 × 10−1 1.02
CH4 237 7.6× 10−12 23.59
N(4S) 31 3.0 × 10−9 33.07
N(2D) 127 5.5 × 10−12 36.35
H2 903 1.1 × 10−3 1.17
H 0 1.2 × 10−10 2.97
CO 1026 1.0× 10−4 1.15
C 51 6.9× 10−13 4.69
O(3P) 36 1.4× 10−19 37.85
C2H2 76 5.6× 10−11 7.19
C2H4 66 4.0× 10−10 6.02
C2H6 174 2.0× 10−11 3.71
HCN 1026 1.3× 10−10 4.35
C+ 181 1.6× 10−10 3.60
N+ 810 1.4× 10−15 1.68
1026 7.4× 10−7 1.94
H+ 196 5.5× 10−12 5.92
e 212 1.0× 10−8 3.15

Notes. These values are computed at the altitude level where the uncertainty on the abundance of the considered species is maximum. F(ÿ) gives the interval at 1σ.

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