Table 1
Fit statistics for best-fit models C, D, and E, and the two unfitted versions of F.
| Solution | Weighting | χ2 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| λQ |  |
λR | λNGA | R | Q | Tz | NGAr | NGAt | NGAn | Obj | |
| C | 1 | 1 | 0 | 1 | 34.1 | 4.53 | 1.36 | 1.18 | 1.32 | 0.44 | 1.20 |
| D | 1 | 1 | 0.02 | 0 | 88.8 | 3.60 | 1.10 | 2.00 | 1.60 | 0.90 | 2.35 |
| E | 1 | 1 | 0.02 | 0 | 83.4 | 3.75 | 0.77 | 1.78 | 1.58 | 0.89 | 2.22 |
| F dust SH | – | – | – | – | 324.5 | 4.62 | 2.09 | 4.12 | 1.71 | 1.01 | – |
| F ice SH | – | – | – | – | 459.2 | 5.64 | 3.02 | 2.22 | 1.63 | 1.00 | – |
Notes. Model E is highlighted as the preferred solution. The model outputs (water production rate, z component of NGT, and the three components of NGA) are compared to the observations, producing the χ2 statistics, which are then weighted according to the λ values and combined in the objective function (Eqs. (9) and (10) in Attree et al. 2019) to produce the combined fit statistic Obj. All values are dimensionless, although the range values R correspond one-to-one to kilometers.
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