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地球の形状

3 件の記事

Map of the undulation of the geoid in meters (based on the EGM96 gravity model and the WGS84 reference ellipsoid).[1]

ジオイドとは何か地球の真の姿と重力の関係を解説

ジオイド地球楕円体重力異常測地学
2026年8月11日続きを読む →
The assignment of semi-axes on a spheroid. It is oblate if c < a (left) and prolate if c > a (right).

回転楕円体（スフェロイド）の基礎知識扁平楕円体と長球の正体

回転楕円体扁平楕円体長球地球の形状
2026年8月11日続きを読む →
A scale diagram of the oblateness of the 2003 IERS reference ellipsoid, with north at the top. The light blue region is a circle. The outer edge of the dark blue line is an ellipse with the same minor axis as the circle and the same eccentricity as the Earth. The red line represents the Karman line 100 km (62 mi) above sea level, while the yellow area denotes the altitude range of the ISS in low Earth orbit.

地球の半径形状の科学と測地学的定義

地球の半径赤道半径極半径WGS84
2026年8月11日続きを読む →