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Table 1 Characteristics of the different gravimeters involved in hybrid gravimetry
Gravimeter | Precision | Stability | Use |
|---|---|---|---|
Superconducting (SG) | <0.1–0.01 μGal | Small drift (1–2 μGal/year) | High-precision continuous monitoring |
Absolute (AG) | 1–2 μGal | No drift | Absolute reference + long-term evolution |
Relative spring (RG) | 5 μGal | Large drift (tens or hundreds of μGal/day) | Prospection + repetition network |