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陸地生態系炭素監視衛星（TECIS）全波形レーザーレーダーによる森林冠高の反転精度分析: カナダケベック温帯針広混交林を例に

  • role： First author第一作者
  • Affiliation：

    Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing, 100048, China

  • Email：chenjy@lasac.cn
  • Introduction：陈继溢，研究方向为卫星激光测高数据处理与应用。E-mail： chenjy@lasac.cn
CHEN Jiyi1,  
  • role： Corresponding author通信作者
  • Affiliation：

    Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing, 100048, China

    Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China

  • Email：ligy_lasac@foxmail.com
  • Introduction：李国元，研究方向为卫星激光测高、卫星遥感水资源调查监测。E-mail： ligy_lasac@foxmail.com
LI Guoyuan12*,  
  • Affiliation：

    Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing, 100048, China

    Shandong University of Science and Technology, Qingdao 266590, China

PENG Jun13,  
  • Affiliation：

    Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing, 100048, China

LIU Zhao1,  
  • Affiliation：

    Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing, 100048, China

    Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China

ZHOU Xiaoqing12

サマリー

陸地生態系の炭素監視衛星であるTECIS（Terrestrial Ecosystem Carbon Inventory Satellite）は中国初の高精度で、陸地生態系の炭素貯蔵量、森林資源および森林生産力をモニタリングするリモートセンシング衛星です。この衛星は、国の「二重炭素」戦略、全国的な重要な生態系保護および修復の大規模なプロジェクトの監視評価に役立ちます。本稿では、フルウェーブエネルギー分布を使用して相対高さ（RH：Relative Height）指標を計算し、陸地生態系炭素監視衛星のフルウェーブレーザーラド データを使用して、森林冠高の能力を詳細に評価しました。また、固定ゲインと可変ゲインの森林キャノピー検出能力の違いを比較し、坂を高くしたキャノピー高の反転について分析しました。カナダケベックの6軌道データを選んで実験分析し、結果は次のとおりです。キャノピーの高さの基準の選択は反転精度に著しい影響を与えます。低いRH指標を使用するとキャノピーの高さを過大評価し、高いRH指標はキャノピーの高さを低く評価します。背景ノイズの閾値もキャノピー高の反転精度に一定の影響を与えます。選択した実験領域では、適切な基準と背景ノイズの閾値を使用して少数以上の異常レーザーポイントを削除してから、森林冠高の反転精度のRMSEは3.58mに達し、MEは1.0mよりも優れ、MAEは2.48mに達します。最後の波形分解の位置と比較して、RH5はキャノピーの高さの基準として効果が最適であり、地形の勾配が反転精度に対する影響が小さいことがわかります。陸地生態系の炭素監視衛星の全波形レーザー レーダーの可変ゲインと固定ゲインのデータは森林地域データの利用率向上に役立っています。総じて、本稿の陸地生態系炭素監視衛星全波形レーザーレーダーのキャノピーの高さの基準、背景ノイズの閾値、全波形固定ゲインと可変ゲインの結論は森林キャノピーの高さの地図作成および生物量推定における応用を支援する有益なものです。

キーワード

陸地生態系炭素監視衛星;全波形レーザーレーダー;森林冠高;相対高さ指標;背景ノイズの閾値;地形の勾配

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