Table 4
Fit coefficients for the distance-dependent single lognormal function, based on Eq. (4) combined with (10) from the combined Helios data.
| Parameter | Median | Mean | Exponent | Balance | Seasonal variation | |
|---|---|---|---|---|---|---|
 |
 |
e′ | c′ | Δd [%] | ||
| Magnetic field [nT] | 5.358(25) | 5.705(28) | -1.662(11) | – | 2.8 | |
| Density [cm−3] | 5.424(33) | 6.845(47) | -2.114(20) | – | 3.6 | |
| Temperature [104 K] | 6.357(64) | 10.72(14) | -1.100(20) | – | 1.9 | |
| Velocity |  |
3.707(13) | 3.748(16) | 0.0990(51) | 0.557(45) | 0.17 |
| [102 km s−1] |  |
5.26(13) | 5.42(11) | |||
 |
4.13(13)a | 4.47(11)a | – | – | – | |
Notes. Regarding the velocity, the double lognormal function (5) is used instead. The numbers in parentheses are the errors on the corresponding last digits of the quoted value. They are calculated from the estimated standard deviations of the fit parameters. The seasonal variations are calculated from Earth’s orbital solar distance variation and the derived exponents.
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