Space environment
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The space environment encompasses a very broad and diverse range of subjects, but here we will focus on the environment that artificial satellites and spacecraft are exposed to in relation to space development. [Satellites and the Space Environment] Atmospheric density is an important factor for artificial satellites orbiting the Earth. The atmosphere below an altitude of about 80 km is called the troposphere (up to an altitude of about 10 km), the stratosphere (10 to 50 km), and the mesosphere (50 to 80 km), going from the ground to the upper atmosphere. The density of the atmosphere decreases exponentially with respect to altitude, and the density of the atmosphere at an altitude of about 100 km is about 10 -6 of the density of the atmosphere on the ground. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
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宇宙環境という場合，そこに含まれる範囲は非常に広くかつ多岐にわたるが，ここでは宇宙開発に関連して，人工衛星や宇宙船が受ける環境に焦点を絞って説明する。 ［人工衛星と宇宙環境］ 地球を周回する人工衛星では大気の密度が重要な要素である。高度約80km以下の大気は，地上から上空へいくに従って，対流圏(高度約10kmまで)，成層圏(10～50km)および中間圏(50～80km)と呼ばれている。大気の密度は高度に対して指数関数を近似式とするように減じ，高度約100kmの大気密度は地上の大気密度の約10－6である。 出典 株式会社平凡社世界大百科事典 第２版について 情報 |
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