Earth radius

Application of effective earth radius and methods to derive it are discussed .

对有效地球半径的推导方法和应用进行了讨论。

The Earth Radius Calculating Method in Radiowave Refractive Correction for Low Altitude Targets

低空目标电波折射修正中地球半径计算方法

Based on conversion of radar measurement parameters from geodetic coordinates to space coordinates , a method is presented for calculating earth radius corresponding to any point on radar wave .

本文通过雷达测量参数和大地坐标与空间坐标的转换，给出了计算雷达电波射线上任意一点对应地球半径的方法。

It is indicated in this paper that effective earth radius can be introduced by using median value approximation of integration , which is also an effective technique to obtain accurate solution of atmospheric effects on radio wave propagation .

该文指出，使用中值近似是获取大气折射精确解的一种途径，而且通过积分中值近似可导出有效地球半径。

On the Concept and Definition of the Effective Earth 's Radius

关于等效地球半径的概念和定义问题

Elevation differences is small compared with the earth 's radius , this is proportional to the height above sea level .

高程差与地球半径相比显得很小，它与海洋面以上的高度成正比。

In track simulation , the corresponding earth equivalent radius of a track in a specific range is approximate to the earth curvature radius of the latitudinal location of the target .

介绍了在航迹模拟中，一条航迹在一定范围内对应的地球等效半径，可以近似为目标所在的纬度的地球曲率半径。

Results show that the current 4 / 3 effective earth 's radius model has the lowest accuracy and can be used only below the height of 1 kilometer over the surface to guarantee sounding accuracy while the modified effective earth 's radius model has the greatest accuracy .

计算结果表明：目前使用的4/3地球半径模式精度较差，只能在离地面1km高度以下使用，才能保证精度；改进等效地球半径模式的精度最高；

Problems in earth 's equivalent radius method application

等效地球半径法应用中的问题

If M is the mass of the Earth , the radius of the event horizon is one centimeter .

视界的半径，是1厘米，若M是太阳的质量。

The theory of plate tectonics motion claims that superficial area of earth ( or radius of earth ) has no clear increase or reduction .

板块构造学说主张，地球表面积（或地球半径）并未发生过显著的增加或减小。

Now , of course , if the Earth had a radius which is this big , then , of course , this curve does not exist , B it stops right here .

如果地球有半径，半径非常大，那么这条曲线不存在，它会停在这里，如果从A移到。

Moreover , in the phase transition process it was found that the size and assembling degree of the product decreased with the increase of rare earth ions concentration or radius .

而且在相变的过程中，导致产物形貌组装程度及粒径均随着稀土离子半径的增大或浓度的增加而显著降低。

So here 's the earth * rotating with angular velocity omega and here is the equator , and the earth has a certain radius .

地球旋转，角速度记为ω，赤道的半径，是定值。