Planetary Space Weather
Open Access
Research Article

Table 1

Coefficients for the MoMo model to predict the vTEC in the Mars’ ionosphere. These coefficients are given for different ranges of solar longitude (Ls) and the two hemispheres. The number of data per range of SZA and the associated RMS of the differences between the vTEC predicted by the model and the observed vTEC are reported in the last columns.

Mean(α 1)
β 1
β 2
#Data
RMS (TECu)
10−2 10−1 10−2 SZA < 75° SZA ≥ 75° SZA < 75° SZA ≥ 75°
North 45° ≤ Ls < 225° 3.284 2.624 1.564 159,997 983,540 0.10 0.05
Hem. 225° ≤ Ls < 45° 3.004 2.950 1.439 258,079 1,070,191 0.12 0.05
South 45° ≤ Ls < 225° 2.473 5.521 0.964 217,032 1,280,671 0.09 0.05
Hem. 225° ≤ Ls < 45° 3.577 −0.222 2.287 220,611 1,118,474 0.11 0.05

MoMo, model of Mars ionosphere; RMS, root mean square; SZA, solar Zenith angle; TECu, total electron content units; vTEC, vertical total electron content.