[doc]-测绘专业外文翻译---现有测绘成果转换到中国大地坐标系-其他专业

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1、附录1英文原文ConversionofexistingmappingresultstotheChinaGeodeticCoordinateSystem2000Chinaisavastareaofthecountry,duetohistoricalreasons,China'sadoptionoftheBeijing54coordinatesystem,suchasXi'an80coordinatesystemcoordinates.Withthemappingtechnologyknownas20

2、00,Chinaestablishedanationalgeodeticcoordinatesystemoftheearthcoordinatesystem.Thiswillbetheextentpossible,onChina'sachievementshavebeenconvertedtothenewmappingcoordinatesavarietyoftheoreticalmethodstobelearningfromindustrypeers.1.DefinitionoftheChina

3、GeodeticCoordinateSystem20001.NationalGeodeticcoordinatesystemisdefinedtoincludetheoriginofcoordinates,threeaxesofdirection,scale,andtheearthellipsoidfourbasicparametersofthedefinition.ChinaGeodeticCoordinateSystemorigintoincludetheoceansandatmosphere

4、wholeEarth'scenterofmass;ChinaGeodeticCoordinateSystemZaxispointingtotheoriginalEpoch2000.0oftheEarth'sdirection,theepochofthepointbytheInternationalBureauoftimeepoch1984.0settheinitialpointfortheprojections,thetimeevolutionoforientationrelativetothec

5、rustdoesnotguaranteetheglobalresidualrotation,X-axispointingtotheoriginalpointofreferenceGreenwichmeridianandtheEarthequatorialplane(epoch2000.0)oftheintersection,Y-axisandZaxis,Xaxistotherighthandorthogonalcoordinatesystem.Withgeneralrelativityinthes

6、enseofscale.ChinaGeodeticCoordinateSystemusedintheearthellipsoidparametersvaluesare:Longaxlea＝6378137mFlatratef=1/298.257222101GravitationalconstantGM＝3.986004418×1014m3s-2Angularvelocityω＝7.292l15×10-5rads-1Otherparametersasfollows:Shortradiusb(m)635

7、6752.31414Polarradiusofcurvaturec(m)6399593.62586Thefirsteccentricitye0.0818191910428Squaredoffirsteccentricitye20.00669438002290SecondEccentricity0.0820944381519SquaredofSecondEccentricity20.006739496775481/4ThelengthofthemeridiancircleQ(m)10001965.7

8、293TheaverageradiusofellipsoidR1(m)6371008.77138ThesamesurfaceareaofthesphereradiusR2(m)6371007.18092ThesamevolumeofradiusR3(m)6371000.78997EllipsoidintheproperpositionU0(m2s-2)62636851.7149DynamicshapefactorJ20.001082629832258Sphericalharmoni