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satellite images of flooding in China July 2020

CNSA

using SAR( synthetic aperture radar) in Gaofeng 3, with resolution up to 1 m, can penetrate clouds to take photos


2017年11月15日2點35分,在我國太原衛星發射中心,風雲三號D星在長征四號丙運載火箭的托舉下順利升空,發射成功!

「風雲三號D」衛星的發射,在氣象和科技領域刷新了國際國內多項記錄。

「風雲三號D」衛星是目前中國光譜測量通道最多的衛星,測量通道近7000個。經過大幅升級改進的核心儀器中解析度光譜成像儀,可媲美美國最新發射的聯合極軌氣象衛星的成像儀器,成為國際上最先進的寬幅成像遙感儀器之一。



此次D星搭載的4台遙感儀器為全新研製、首次上星搭載,紅外高光譜大氣探測儀採用了目前國際上最先進的傅立葉干涉探測技術;近紅外高光譜溫室氣體監測儀是首次從風雲衛星上搭載的監測全球溫室氣體濃度的遙感儀器;廣角極光成像儀是全球首台從空間大範圍獲取極光圖像的遙感儀器,在世界處於領先地位;繼美國後成為全球第二個搭載電離層光學儀器的衛星。

此外,該星還能對氣溶膠和二氧化碳等溫室氣體進行更有效的監測,將為全球碳循環研究提供重要數據,增強中國在全球碳排放等問題上的話語權。

「風雲三號」D衛星交付使用後,將使全球數值天氣預報的更新時效從6小時進一步縮短到4小時。

2021年6月3日,風雲四號B星搭乘長征三號乙運載火箭在西昌衛星發射中心成功發射。作為我國新一代靜止軌道氣象衛星風雲四號系列衛星的首發業務星,風雲四號B星將與在軌運行的風雲四號A星組網協同工作。

除提高頻率外,風雲四號B星將提供比A星更高的探測靈敏度和探測精度。它可在36000千米距離精確感知到地球大氣0.05攝氏度的溫度變化,其溫度探測結果與真實值的偏差在0.5攝氏度以內,相比A星提高1倍。

“高分专项”7颗卫星将于2020年前发射并使用“高分专项”是一个非常庞大的遥感技术项目,包含至少7颗卫星和其他观测平台,分别编号为“高分一号”到“高分七号”,它们都将在2020年前发射并投入使用。“高分一号”为光学成像遥感卫星;“高分二号”也是光学遥感卫星,但全色和多光谱分辨率都提高一倍,分别达到了1米全色和4米多光谱;

“高分三号”为1米分辨率;“高分四号”为地球同步轨道上的光学卫星,全色分辨率为50米;“高分五号”不仅装有高光谱相机,而且拥有多部大气环境和成分探测设备,如可以间接测定pm2.5的气溶胶探测仪;

“高分六号”的载荷性能与“高分一号”相似;“高分七号”则属于高分辨率空间立体测绘卫星。“高分”系列卫星覆盖了从全色、多光谱到高光谱,从光学到雷达,从太阳同步轨道到地球同步轨道等多种类型,构成了一个具有高空间分辨率、高时间分辨率和高光谱分辨率能力的对地观测系统。

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