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ジオイド

8 件の記事

This marker indicating sea level is situated between Jerusalem and the Dead Sea.

平均海面(MSL)の定義と地球規模の変動メカニズム

平均海面MSL海面変動ジオイド
City of Chicago Datum Benchmark

測地基準系(ジオデティック・データム)の仕組みと現代の座標系

測地基準系ジオデティック・データムWGS 84楕円体
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
Earth's gravity measured by NASA GRACE mission, showing deviations from the theoretical gravity of an idealized, smooth Earth ellipsoid. The deviations toward stronger gravity are colored red; deviations toward weaker gravity are colored blue.[1][2]

地球の重力場所や高度で変化する物理的メカニズム

地球の重力重力加速度標準重力遠心力
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
Earth model with circles of latitude in black and indications of the North Pole, Equator, and the northern and southern hemispheres.

緯度と経度の仕組み地球の形状と測地学的な座標系

緯度経度測地学WGS84
Image of globe combining color with topography.

地球物理学の基礎惑星地球を形作る物理現象と観測手法

地球物理学地磁気逆転プレートテクトニクスジオイド
This marker indicating sea level is situated between Jerusalem and the Dead Sea.

平均海面(MSL)の定義と地球規模の変動メカニズム

平均海面MSL海面上昇ジオイド