简介：结合Gyromat2000陀螺经纬仪工作原理,对其测量过程和影响测量精度的主要因素进行分析讨论.并通过实验得出有益的结论.

简介：Inthisstudy,about220satelliteimagesbetween2000and2012wereobtainedfromFY-series,MODIS,CBERS,HJ-1AandHJ-1BtoestimatetheimpactofduststormsontheSouthYellowSea(SYS),whichserveasanimportantsourceofparticlesthere.Theanalyzingresultsfromtheimagessupportatotaloccurrenceof88duststorms(includingthelocally-generateddustyweather)thataffectedtheSYSduring2000–2012.Theannualoccurrencewasabout4–10times(10timesin2000and2004;fourtimesin2009and2012),predominantlyinMarch(29%),April(33%)andMay(22%).Bymappingthedistributionoftheirfrequency,theduststormsinfluencingtheSYSwerefoundprimarilymovingfromthenorthwest(39times,44.3%)andwest(37times,42%)tothestudyregionwithonly11duststorms(12.5%)comingfromthenorthand1duststorm(1%)fromthesouthwest.Weestimatedthatanannualamountof0.5–3.5milliontonsofsedimentparticleswasbroughttotheSYSbytheduststormsduring2000–2012.

简介：基于格网的坐标转换，其过程可分为建立格网和格网内插两部分。建立格网过程中生成的格网文件是格网内插的前提，为了使格网文件便于解释和应用，需要制订合理的格网文件格式。目前，有NADCON和NTv2两种格式可供参考。通过这两种格式的比较分析，认为NTv2格式更优，并将其作为参考，研究了面向CGCS2000的格网坐标转换中所使用的格网文件的具体格式，并以1954北京坐标系（BJS54）到2000国家大地坐标系（CGCS2000）的转换为例，提供了设计样本。