SatelliteOribit: # 轨道起算时间
    StartTime:
        Value:
            '2017-09-15 01:55:21.0000'
        format: # 时间格式
            "%Y-%m-%d %H:%M:%S.%f"
    ReferenceSpheroid:
        Re: # 长半轴
            6378137
        Rp: # 短半轴
            6356752.3142451795
        we:
            0.000072292115
GPS: # GPS 轨道节点 LT
    GPSNode_Path:
        ['level1Product','platform','orbit', 'stateVec']
    NodeInfomation_Name: # [时间，x坐标，y坐标，z坐标，x速度，y速度，z速度]
        ['timeUTC', 'posX', 'posY', 'posZ', 'velX', 'velY', 'velZ']
    Time_format:
        "%Y-%m-%dT%H:%M:%S.%f"

imageinfo: # 影像信息
    ImageBox:
        NodePath:
            ['product','imageinfo','orbit', 'stateVec']
        NodeName:
            ['topLeft','topRight','bottomLeft','bottomRight']
        latLon:
            ["latitude","longitude"]
    ImageWidthSpace:
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster','columnSpacing']
    ImageHeightSpace:
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster','rowSpacing']
    ImageWidth: # 影像宽
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster', 'numberOfColumns']
    ImageHeight: # 影像高
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster', 'numberOfRows']
    Groundspace:
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster', 'groundRangeResolution' ]
    Azspace:
        NodePath:
            ['level1Product','productInfo','imageDataInfo', 'imageRaster', 'azimuthResolution' ]
    StartImageTime: # 影像开始时间
        NodePath:
            ['level1Product','productInfo','sceneInfo', 'start', 'timeUTC']
        Format:
            "%Y-%m-%dT%H:%M:%S.%f"
    EndImageTime: # 影像中止时间
        NodePath:
           ['level1Product','productInfo','sceneInfo', 'stop', 'timeUTC']
        Format:
            "%Y-%m-%dT%H:%M:%S.%f"
    CenterImageTime: # 中心像元时间
        NodePath:
            ['product','platform','CenterTime']
        Format:
            "%Y-%m-%d %H:%M:%S"
    CenterFrequency: # 中心频率
        NodePath:
            ['level1Product','instrument','radarParameters', 'centerFrequency']
        Format:
            "%Y-%m-%d %H:%M:%S"
    CenterImagePositon: # 中心像元，可以作为迭代起算点
        NodePath:
            ['product','imageinfo','center']
        Value:
            ['latitude','longitude']      
    NearRange: # 近斜距
        NodePath:
            ['level1Product','productInfo','sceneInfo','rangeTime', 'firstPixel']
    FarRange:
        NodePath:
            ['level1Product','productInfo','sceneInfo','rangeTime', 'lastPixel']
    DopplerCentroidCoefficients: # 多普勒质心常数
            NodePath:
                ['product','processinfo','DopplerCentroidCoefficients']
            DopplerCentroidCoefficients_Name:
                ['d0','d1','d2','d3','d4']
    DopplerParametersReferenceTime:
            NodePath:
                    ['level1Product','processing',"geometry", 'dopplerRate', 'dopplerRatePolynomial', 'referencePoint']
    DopplerRate:
            NodePath:
                    ['level1Product','processing',"geometry", 'dopplerRate', 'dopplerRatePolynomial', 'coefficient']

sensor:
    PRF: # 脉冲重复频率
        NodePath:
            ['level1Product','instrument','settings', 'settingRecord', 'PRF']
    bandWidth: # 信号带宽，计算距离向分辨率 用于距离向分辨率
        NodePath:
            ['product','sensor','waveParams','wave','bandWidth']
    lambda: # 波长
        NodePath:
            ['product','sensor','lamda']
    Fs: # 等效采样频率 eqvFs
        NodePath:
            ['product','imageinfo','eqvFs']
LightSpeed:
    299792458