グリーンランドの氷床から異常なレーダーが反響している
まとめ
空中レーダーがグリーンランドを明らかにした.
科学分野:
- 惑星科学は惑星科学である.
- 氷河学 氷河学とは
- リモートセンシング (リモートセンサー)
背景:
- レーダー画像は,惑星の表面を研究する上で極めて重要です.
- 地球上の氷の環境と太陽系外部の天体は,同様のレーダーサインを発揮することができます.
- これらの類似性を理解することは,遠隔感知による解釈に役立ちます.
研究 の 目的:
- グリーンランドの凍った地形と木星のガリレオ衛星のレーダー特性を比較する.
- グリーンランドの浸透地帯からのユニークなレーダーエコーを調査するために.
- レーダー信号における異常な偏振比を分析する.
主な方法:
- グリーンランドの氷床の空中レーダー画像.
- 5.6cmと24cmの波長でのレーダーエコーの分析.
- 氷の衛星からの既存のレーダーデータ (3.5cmと13cmの波長) と比較.
主要な成果:
- グリーンランドの凍った地形は,他の地表と比較してユニークなレーダー特性を発揮しています.
- グリーンランドからのレーダーエコーは,氷のついたガリレオの衛星からのレーダーエコーに似て,非常に強いものです.
- グリーンランドとガリレオの衛星レーダーエコーの両方で異常な円形および線形偏振比が観察されました.
結論:
- グリーンランドの浸透ゾーンのレーダー特性は,木星の氷の月と類似しています.
- 地下層の異質性は,異なる形成プロセス (融解/再凍結対隕石爆撃) により著しく異なる.
- レーダーの遠隔感知は,太陽系全体で多様な氷の環境についての洞察を提供します.
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