椭球模型 meaning in Chinese
ellipsoidal model
Examples
- The sixth chapter discusses the method for space transformation , which considers the curvature of the earth surface . the author first demonstrates that it is necessary to use ellipsoidal model for the system and educes the transform formula
第六章讨论了考虑到地球曲率情况下的精确空间对齐问题。这一章中首先论证了应用大地椭球模型的必要性,然后推导出椭球面上的局部坐标间的坐标转换公式。 - The conventional sphere model of earth and circle model of orbit are discarded , and the ellipsoid model and the ellipse model are selected for further research , which achieves a method to determine the target position through the antenna pointing direction . and the spaceborne sar system design and simulation software is brought forth . this software accomplishes sar system coefficients design for antenna area , pulse repetition frequency , signal bandwidth , downlink data rate , radar transmitter power and satellite platform yaw steering
本文从星载雷达的星地几何关系入手，舍弃传统星载合成孔径雷达研究中的球地球模型和圆轨道模型，研究了在地球椭球模型和椭圆轨道模型下由雷达天线确定目标坐标的方法，并在此基础上研制了星载合成孔径雷达系统设计与模拟软件，完成雷达系统天线尺寸、脉冲重复频率、信号带宽、雷达信号数据率、雷达发射功率、卫星平台的偏航牵引等几个方面的系统参数设计以及雷达多普勒特性、雷达系统模糊、雷达定位及精度的分析，最后完成雷达回波信号的模拟。 - This dissertation adopts the modularization programming method to develop the spaceborne sar system design and simulation software , which obtains the windows common interface and logical integrated structure , convenient for usage , maintenance and function extension . 2 . as for the earth model and orbit model , according to the properties of spaceborne sar operation , in this dissertation , we reject the sphere earth model and circle orbit model and present a novel way to solve spaceborne geometry relations between radar and target by three ellipses , and achieve the way to determine the target position by antenna pointing direction
在地球模型和轨道模型方面，论文根据星载合成孔径雷达工作的特点，摒弃了球地球和圆轨道的传统模型，创新性的采用三个椭圆解决了星载雷达的星地几何关系问题，得到了在地球椭球模型和椭圆轨道模型下由雷达天线指向确定目标坐标的方法，为星载合成孔径雷达系统设计与模拟提供了更为精确的几何基础。