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Influence analysis of gaseous absorption on “HY—1A” CZI data processing Simulation and correction for Rayleigh scattering

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Acta Oceanologica Sinica 2008年第6期27卷 102-114页

作者： SUN Ling ZHANG Jie guo maohua National Satellite Meteorological Center China Meteorological Administration Beijing 100081 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China National Satellite Ocean Application Service National Marine Environmental Forecasting Center State Oceanic Administration Beijing 100081 China

Besides ozone, oxygen and water vapour should be considered for their absorptive effects on ＂HY--1A＂ CZI data processing. First ,gaseous transmittances under various conditions are computed and analyzed for the band settings of this sensor. Second, transmittances under six standard atmospheres are approximated as functions of zenith angle, the water vapour transmittance is approximated as a function of water vapour content and zenith angle, and the ozone transmittance is approximated as a function of ozone content and zenith angle. Finally, taking Rayleigh scattering as an example, the influence of ignoring gaseous absorption when calculating TOA reflectance is analyzed, and the effect of applying the presented transmittance approximations to gaseous absorption correction for Rayleigh scattering in ＂HY--1A＂ CZI data processing is evaluated.

关键词： "HY--1A" CZI gaseous absorption transmittance 6S

The study on an Antarctic sea ice identification algorithm of the HY-2A microwave scatterometer data

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Acta Oceanologica Sinica 2016年第9期35卷 74-79页

作者： ZOU Juhong ZENG Tao guo maohua CUI Songxue National Satellite Ocean Application Service State Oceanic Administration

An Antarctic sea ice identification algorithm on the HY-2A scatterometer（HSCAT） employs backscattering coefficient（σ0） and active polarization ratio（APR） for a preliminary sea ice *** standard deviation（STD） filtering and space filtering are carried ***,it is used to identify sea ice.A process uses a σ0,STD threshold and an APR as sea ice *** sea ice identification results are verified using the sea ice distribution data of the ASMR2 released by the National Snow and Ice Data Center as a *** results show very good consistence of sea ice development trends,seasonal changes,area distribution,and sea ice edge distribution of the sea ice identification results obtained by this algorithm relative to the ASMR2 sea ice *** accuracy of a sea ice coverage is 90.8% versus the ASMR2 sea ice *** indicates that this algorithm is reliable.

关键词： HY-2A scatterometer sea ice identification Antarctic

FY-3A/MERSI, ocean color algorithm, products and demonstrative applications

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Acta Oceanologica Sinica 2013年第5期32卷 75-81页

作者： SUN Ling guo maohua ZHU Jianhua HU Xiuqing SONG Qingjun Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration (LRCVES/CMA) National Satellite Meteorological Centre China Meteorological Administration National Satellite Ocean Application Service State Oceanic Administration National Ocean Technology Centre State Oceanic Administration

A medium resolution spectral imager （MERSI） on-board the first spacecraft of the second generation of Chinas polar-orbit meteorological satellites FY-3A, is a MODIS-like sensor with 20 bands covering visible to thermal infrared spectral region. FY-3A/MERSI is capable of making continuous global observations, and ocean color application is one of its main targets. The objective is to provide information about the ocean color products of FY-3A/MERSI, including sensor calibration, ocean color algorithms, ocean color prod- ucts validation and applications. Although there is a visible on-board calibration device, it cannot realize the on-board absolute radiometric calibration in the reflective solar bands. A multisite vicarious calibration method is developed, and used for monitoring the in-flight response change and providing post-launch cal- ibration coefficients updating. FY-3A/MERSI ocean color products consist of the water-leaving reflectance retrieved from an atmospheric correction algorithm, a chlorophyll a concentration （CHL1） and a pigment concentration （PIG1） from global empirical models, the chlorophyll a concentration （CHL2）, a total sus- pended mater concentration （TSM） and the absorption coefficient of CDOM and NAP （YS443） from Chi- na＇s regional empirical models. The atmospheric correction algorithm based on lookup tables and ocean color components concentration estimation models are described. By comparison with in situ data, the FY-3A/MERSI ocean color products have been validated and preliminary results are presented. Some suc- cessful ocean color applications such as algae bloom monitoring and coastal suspended sediment variation have demonstrated the usefulness of FY-3A/MERSI ocean color products.

关键词： FY-3A/MERSI ocean color multisite calibration atmospheric correction China's regional model

A routine operational backscattering coefficient regrouping algorithm for a HY-2A scatterometer

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Acta Oceanologica Sinica 2018年第3期37卷 111-116页

作者： ZOU Juhong LIN Mingsen ZOU Bin guo maohua ZHANG Yi Key Laboratory of Space Ocean Remote Sensing and Application State Oceanic Administration National Satellite Ocean Application Sevice State Oceanic Administration

The routine operational sigma0 regrouping method is proposed for a HY-2 A scatterometer（HSCAT） that maps time-ordered sigma0 s and related parameters into a subtrack aligned grid of wind vector cells（WVCs）. The regrouping method consists of two critical steps： ground grid generation and sigma0 resampling. The HSCAT uses subtrack swath coordinates, in which the nadir track of the satellite represents the center and the designated positions are specified in terms of a pair of along-track and cross-track coordinates. To calculate the subtrack coordinates for each sigma0, a ＂triangle marking＂ resampling method is developed. Three points, including the point of intersection, the center of a pulse footprint, and the origin of the subtrack coordinate system, form a right triangle; the length of the two right-angled sides is used to represent the cross-track and the along-track coordinates in the subtrack coordinate system. In addition, a nadir point interpolation correction is used to ensure the operation of the regrouping algorithm when the nadir point positional information is missing. To illustrate the ability of the proposed regrouping algorithm, the distribution of the WVC positions and wind vector retrieval results are analyzed, which show that the proposed regrouping algorithm meets the requirements for high-quality sea surface wind field retrieval.

关键词： regrouping HY-2A scatterometer backscattering coefficient

Ocean color products retrieval and validation around China coast with MODIS

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Acta Oceanologica Sinica 2010年第4期29卷 21-27页

作者： SUN Lingt guo maohua WANG Xiaomei Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration （LRCVES/CMA） National Satellite Meteorological Center China Meteorological Administration Beijing 100081 China National Satellite Ocean Application Service State Oceanic Administration Beijing 100081 China

Waters along China coast are very turbid with high concentrations of suspended sediment nearly all the time,especially at the Hangzhou Bay,the Changjiang （Yangtze） River Estuary and the shoal along Jiangsu *** these turbid and optically complex waters,the standard MODIS ocean color products tend to have invalid *** the water-leaving radiances in the near-infrared （NIR） are significant resulting from the strong scattering of suspended particles,the standard MODIS atmospheric correction algorithm often gets no results or produces significant *** because of the complex water optical properties,the OC3 model used in the standard MODIS data processing tends to get extremely high chlorophyll-a （Chl-a） *** this paper,we present an atmospheric correction approach using MODIS short wave infrared （SWIR） bands based on the fact that water-leaving radiances are negligible in the SWIR region because of the extreme strong absorption of water even in turbid waters.A regional Chl-a concentration estimation model is also constructed for MODIS from in situ *** algorithms are applied to MODIS Aqua data processing in the China coastal *** situ data collected in the Yellow Sea and the East China Sea in spring and autumn,2003 are used to validate the *** good results have been *** is noted that water-leaving reflectance in the NIR bands are significant in waters along the China coast with high sediment *** satellite derived and in-situ reflectance spectra can match in the turbid waters along China coast,and there is relatively good linear relationship between satellite derived and in-situ *** RMSE value of Rrs（λ） is 0.0031 sr ？1 for all the nine ocean color bands （412 to 869 nm）.The satellite-derived Chl-a value is in the reasonable range and the root mean square percentage difference is 46.1%.

关键词： ocean color atmospheric correction chlorophyll-a MODIS China coastal region validation

云南白锡腊碱性钛铁质辉长岩类与铁氧化物铜金型矿床关系研究

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大地构造与成矿学 2013年第2期37卷 242-261页

作者：方维萱杨新雨郭茂华柳玉龙中色地科矿产勘查股份有限公司北京100012 昆明中色地科矿产勘查有限责任公司云南昆明650224

云南东川白锡腊铁铜矿段深部碱性钛铁质辉长岩类具有明显的岩相学分带,最新发现的铁氧化物铜金型(IOCG)矿体受碱性钛铁质辉长岩类与隐爆角砾岩相带控制。地球化学研究显示本区碱性钛铁质辉长岩-碱性钛铁质闪长岩具有贫硅、富碱、高磷、... 详细信息

云南东川白锡腊铁铜矿段深部碱性钛铁质辉长岩类具有明显的岩相学分带,最新发现的铁氧化物铜金型(IOCG)矿体受碱性钛铁质辉长岩类与隐爆角砾岩相带控制。地球化学研究显示本区碱性钛铁质辉长岩-碱性钛铁质闪长岩具有贫硅、富碱、高磷、富钛铁特征,富集大离子亲石元素(LILE)、稀土元素(REE)及高场强元素(HFSE),与洋岛玄武岩(OIB)类特点一致,具有富铁地幔源区特征。锆石SHRIMP U-Pb年龄揭示它们形成时代为1067±20 Ma^1047±15 Ma,揭示了本区碱性钛铁质辉长岩类和铁氧化物铜金型矿床形成时代为中元古代末期,属于格林威尔同造山期形成的产物。推测这种碱性钛铁质辉长岩类的岩浆源区属板内洋岛玄武岩(OIB),地幔流体交代作用导致上涌侵位,这种富铁地幔源区为区域上大规模铁铜金属超量聚集,提供了良好的成矿动力学条件和丰富成矿物质,不但有利于大型-超大型铁氧化物铜金型矿床形成,而且有利于钛铁矿和铜硫化物(铂钯)富集成矿。

关键词：云南白锡腊矿段碱性钛铁质辉长岩铁氧化物铜金型(IOCG)矿床板内洋岛玄武岩富铁地幔源区

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海洋二号卫星微波散射计面元匹配

遥感学报 2017年第6期21卷 825-834页

作者：邹巨洪林明森张毅穆博郭茂华崔松雪国家卫星海洋应用中心北京100081 国家海洋局空间海洋遥感与应用研究重点实验室北京100081

面元匹配是散射计海面风场反演的重要预处理步骤。为保障海洋二号卫星散射计(HSCAT)业务化海面风场反演,提出了一种可业务化运行的HSCAT面元匹配算法。HSCAT面元匹配算法包括地面网格划分和后向散射系数观测结果重采样两个关键部分。为... 详细信息

面元匹配是散射计海面风场反演的重要预处理步骤。为保障海洋二号卫星散射计(HSCAT)业务化海面风场反演,提出了一种可业务化运行的HSCAT面元匹配算法。HSCAT面元匹配算法包括地面网格划分和后向散射系数观测结果重采样两个关键部分。为简化计算,HSCAT采用以星下点轨迹为中心,以顺轨向及交轨向为坐标轴,分辨率为25 km×25 km的网格划分方式。重采样利用卫星星下点经纬度数据,对每个后向散射系数观测结果,以后向散射系数与各星下点球面距离的最小值为依据进行交轨向重采样,并以取得距离最小值所对应的星下点与该轨数据星下点起始位置的距离为依据进行顺轨向重采样,实现对后向散射系数观测结果的面元匹配。实验和对比结果表明,提出的面元匹配算法可对后向散射系数进行有效的重采样,风矢量面元的位置分布均匀,每个风矢量面元均有足够数量的独立观测后向散射系数,可在全球范围内满足高质量海面风场反演的要求。

关键词：面元匹配海洋二号 HSCAT 风矢量面元地面网格

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MODIS水色产品在黄东海域的真实性检验

湖泊科学 2009年第2期21卷 298-306页

作者：孙凌王晓梅郭茂华唐军武中国气象局国家卫星气象中心北京100081 国家海洋局国家卫星海洋应用中心．北京100081

水色产品的真实性检验无论对于算法的改进还是后续应用的可靠性保障来说都是十分重要的.中国近海是世界上最为浑浊的海域之一,NASA标准MODIS水色产品在该海域的精度十分有限.然而,局限于高质量海上实测数据的获取,相关的检验工作并未得... 详细信息

水色产品的真实性检验无论对于算法的改进还是后续应用的可靠性保障来说都是十分重要的.中国近海是世界上最为浑浊的海域之一,NASA标准MODIS水色产品在该海域的精度十分有限.然而,局限于高质量海上实测数据的获取,相关的检验工作并未得到有效开展.利用2003年春季和秋季黄东海航次的实测数据对MODISAqua标准水色产品中的归一化离水辐亮度LwN(λ)(转换成遥感反射率Rrs(λ))和叶绿素a浓度(Chl.a)进行了真实性检验分析.采用3×3像元和±3h作为时空匹配窗口,并根据空间均匀性判识准则进行了数据剔除.基于验证数据(中低混浊水体)的分析,得到初步结论:(1)MODIS的Rrs(λ)反演结果具有一定精度,但是不能满足10%的误差期盼,且412nm波段的结果明显较差.反演值与实测值之间具有良好线性相关关系,对于所有6个波段,均方根偏差约为0.0030sr-1,相对偏差绝对值的中值约为25%.MODIS反演的Rrs(λ)与实测光谱的形状基本相似,数值多数偏低,特别是在高值区,另外,412和667nm波段在低值区大多数偏低,甚至出现负值,主要是大气修正过程中近红外波段离水辐射和气溶胶类型不适当造成的.(2)MODIS的Chl.a精度很差.反演值整体偏高,且与实测值之间不具有明显的线性相关关系,两者的均方根偏差约为1.56mg/m3,相对偏差绝对值的中值约为103.25%,主要是OC3M模型(系数)的不适用性造成的.

关键词：真实性检验黄东海 MODIS 遥感反射率叶绿素a浓度

陕川丁家林-太阳坪-董家院金矿带的矿田构造-岩相学研究

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大地构造与成矿学 2014年第4期38卷 787-801页

作者：付于真方维萱刘家军范玉须郭茂华蒋加燥中国地质大学(北京)地球科学与资源学院北京100083 中色地科矿产勘查股份有限公司北京100012

陕西丁家林-四川太阳坪-四川董家院北东向金矿带位于后龙门山陆内造山带,构造动力学背景为陆-陆板块碰撞而形成的逆冲推覆造山带,金矿带内发育一系列与陆内造山作用密切有关的北东向递进脆-韧性剪切带。本文以构造-岩相学新方法为指导,... 详细信息

陕西丁家林-四川太阳坪-四川董家院北东向金矿带位于后龙门山陆内造山带,构造动力学背景为陆-陆板块碰撞而形成的逆冲推覆造山带,金矿带内发育一系列与陆内造山作用密切有关的北东向递进脆-韧性剪切带。本文以构造-岩相学新方法为指导,在矿田构造-岩相学层次上,通过实测构造-岩相学剖面和岩石地球化学研究,对该金矿带物质学和运动学特征研究表明,赋矿地层志留系黄坪组(S1-2hn)区域性岩相学特征整体为陆棚相。黄坪组中部层间流体活动强烈,地壳浅部富Fe-Mg-CO32–型构造流体活动形成了斑点状铁碳酸盐千枚岩相;随构造变形层次加深,强应变带发育构造片岩相和初糜棱岩相,富Si O2型流体排泄的构造分异成岩作用形成了流变状糜棱岩相。强烈的构造成岩作用及造山带流体的大规模排泄形成了糜棱岩相,同位发育密集的流变状糜棱岩相和蚀变菱铁矿铁白云石网脉相。构造流体成岩成矿作用集中于强应变带形成蚀变糜棱岩相,后期脆性蚀变碎裂岩相叠加时,金矿化(体)发育。早期韧性剪切和脆韧性剪切变形并叠加有后期脆性变形构造,富集Au-Cu-Sb-W-Bi等元素组合。本区缺少或未见早三叠世以后形成的岩浆活动。大规模富Fe-Mg碳酸盐型流体及同构造期造山带流体活动与龙门山陆内造山带密切相关,表明丁家林-太阳坪-董家院金矿为造山型金矿。

关键词：陕西四川脆韧性剪切带构造-岩相学造山型金矿