地球の質量中心の変動を追跡、季節による水の分布変化が影響
季節による水の分布の変化により、地球の質量中心が幾何学的中心に対して数インチのずれで変動する。NASAの科学者らはこの振動を追跡しており、地球の質量中心は衛星航法と標高測定の重要な基準点だからだ。
出典：NASA ／ 自動翻訳のため訳文が不正確な場合があります
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