Comparison of the two popular ranging-based 3DMA GNSS methods
| Criteria | Skymask 3DMA | Likelihood-based ranging GNSS |
|---|---|---|
| Input parameters | Satellite position Positioning candidate position and its enhanced skymask | Pseudorange difference |
| Correction-based | Geometry | Statistical |
| Available correction | Reflection delay | Reflection delay and some noise |
| Uncertainty | Building model accuracy | The healthiness of the selected reference satellite |