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ID:27553581
大小:249.50 KB
页数:5页
时间:2018-12-03
《bmp与noaa卫星的数据结构》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、1.BMP文件BMP文件的数据结构typedefstructtagBITMAPFILEHEADER{WORDbfType;DWORDbfSize;WORDbfReservedl;WORDbflteervediiDWORDbfOffBits;BII¥APFILEHEADERyFAR'LPBITMAPFILEHEADER,W1TMAPFILEHEADER;typedefstructtagBITMAPINFOHEADER{DWORDbiSize;LONGbiWidth;LONGbiHeight;WORDbiPlanes;WORDbiBitCount;DWORDbiCompression;DWO
2、RDbiSizelmage;LONGbiXPelsPerMeter;LONGbiYPelsPerMeter;DWORDbiClrUsed;DWORDbiClrlmportant;}BITMAP1NF0HEADER,FAR^LPBITMAPINFOHEADER,*PBITMAPINFOHEADER;typedefstructtagRGBQUAD{BYTErgbBlue;BYTErgbGreen;BYTErgbRed;BYTErgbReserved;}RGBQUAD;BMP文件的显示方法原始大小,不用拉仲:用SetDIBitsToDevice()函数非原始大小,拉伸:用StretchDIBi
3、ts函数请熟悉:CDC与CPalette类BMP文件的读写应注意两点:1.每一行的字节数必须是4的整倍数,如果不是,则需要补齐。这在前面介绍biSizelmage时Li经提到了。2.—般来说,BMP文件的数据是从下到上、从左到右的。即从文件中最先读到的是图像最下面一行的左边第一个像素,然后是左边第二个像素...接下来是倒数第二行左边第一个像素,左边第二个像素...依次类推,最后得到的是最上面一行的最右一个像素。一、NOAA卫星数据的读取与显示NOAA的HRPT的数据结构FunctionNo.ofWordsWordPositionBitNo.PlusWordCode&12345678910
4、MeaningFrameSync6110100001002010110111131101011100(SeeNote1.)401100111015100000111160010010101ID(AVHRR)27Bit1:0=InternalSync;1=AVHRRSyncBits2&3;00=Notused;01=MinorFrame林1;10=MinorFrame林2;ll=MinorFrame#3Bits4~7;SpacecraftAddresses;Bit4=MSB,Bit7=LSBBit8;0=FrameStable;l=FrameresyncoccurredBits9-10;s
5、pare;bit9=0,bit10=18Spareword;bitsymbolsundefinedTimeCode49Bits1~9;Binaryclaycount;Bit1=MSB;Bit9=LSBBit10;0;spare10Bits1-3;allzeroes;spare1,0,1Bits4-10;Partofbinarymsecofdaycount;Bit4=MSBofmseccount11Bits1-10;Partofbinarymsecofdaycount;12Bitsl~10;Remainderofbinarymsecofdaycount;Bit10二LSBofmseccou
6、ntTelemetry(AVHRR)1013RampCalibrationAVHRRChannel#114RampCalibrationAHVRRChannel#215RampCalibrationAHVRRChannel#316RampCalibrationAHVRRChannel#417RampCalibrationAHVRRChannel#518PRTReading119PRTReading2(SeeNote2.)20PRTReading321AVHRRPatchTemperature220000000001SparcInternalTargetData302310wordsofi
7、nternaltargetdatafromeachAVHRRchannel3,4and5.Thesedataaretimemultiplexedaschan3(word1),(AVHRR)chan4(word1),chan5(word1),chan3(word2),chan4(word2),chan5(word2),etc.SpaceData(AVHRR)5053thru10210wordsofspacescandatafromea
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