Gravity : Term description (MIRAI)

Gravity - Term description

Gravity tie
    Ag = Pg + β × HS/100 + (HD - HSG)/100 × (β - 4π•k•ρw)
            (4π•k•ρw = 0.0864)

Ag: The absolute gravity at the shipboard sensor position (mGal)
Pg: The absolute gravity of the portable gravity meter (mGal)
HSG: Height of the shipboard gravity meter from the ship bottom (530cm; R/V MIRAI)
HS: Sea level (cm)
HD: Draft (cm)
β: Free-air gradient 0.3086(mGal/m)
k: Gravitational constant
ρw: Density of sea water