精化大地水准面
precise determination of geoid
precisely determined geoid
1°×1°厘米级全球大地水准面
1°×1° global geoid with centimeter-level
大地水准面差距
Geoid-spheroid separation
difference between ellipsoidal and normal height
geoid distance
大地水准面差距偏导数
partial differential coefficient of the geoid difference