地球曲率

最后，考虑到地球曲率对远距离目标探测会对高度估计产生不可避免的偏差，通过分析偏差大小给出高度估计的修正值。

Considering the inevitable estimated bias , due to curvature of the earth for long distance target detection , a measurement of the correction is supplied .

GPS辅助光束法平差中的地球曲率改正

Correction of Earth Curvature in GPS supported Bundle Block Adjustment

测量中地球曲率改正的严密计算方法

Accurate Method to Calculate Curvature Correction of the Earth in Survey

机载雷达功能仿真中地球曲率的影响

Influence of the Earth Curvature in the Airborne Radar 's Function Simulation

也谈三角高程测量中地球曲率的改正

Talking about Earth - Curvature Correction in Trigonometric Leveling

WILD-A10仪地球曲率校正应补充的一项

An Item of Earth Curvature Rectification That Should Be Replenished of Wild A10

关于地球曲率对低频电波电离层反射系数计算的影响

Influence of earth 's curvature on Calculation of ionosphere reflection at LF and VLF bands

在仿真实验的基础上，分析了地球曲率对目标回波和面杂波功率的影响。

Based on the simulation , the earth curvature 's influence to target echo and surface clutter power was analyzed quantitatively .

它充分利用地形遮蔽和地球曲率对敌方雷达等探测系统影响的特点，减小飞行器遭到打击的机会，提高突防飞行器的生存概率。

It makes full use of the terrain shelter and the characteristic of the earth 's curvatures to improve viability of aircrafts .

后者充分考虑地球曲率以及大气折射的特性，通过增加地球半径来估算目标的高度。

The latter first research the properties of earth curvature and atmospheric refraction , then estimate the altitude by increasing the radius of the earth .

为了能够尽量真实地描述地面反射路径效应，目标-地面-雷达的途经路径则加入了地球曲率的影响。

To describe the ground reflection effects as much as they are , the paths of target-ground-radar in consideration of the effects of earth curvature .

分析了“测量中地球曲率改正的严密计算方法”一文的严密计算公式，从光电测距和坐标反算两方面讨论了水平距离的计算，提出了曲率改正的实用计算方法。

The geologic curvature used in this paper is a new kind of curvaturecalculating method for geologic layers , which processes strictness in mathematics and practical significance in geology .

在综合考虑地球曲率、高度、气象条件、大气特性等条件的基础上，建立了红外传输的空间大气透过率计算模型；

Taking into account of telluric curvature , altitude , meteorologic condition , atmosphere characteristic and so on , the three dimensional atmospheric transmittance model of infrared transfer was set up ;

在长基线测向交叉被动定位系统中，由于各被动接收站的站间距比较大（几十公里），所以必须考虑地球曲率对利用各站角度测量数据定位算法精度的影响。

In the long baseline DOA ( directing of arrival ) passive location system , the influence of the ablateness of the earth on the location algorithm accuracy must be taken into consideration .

WILD-A10仪带地球曲率自动改正装置的77点方格网量测精度有时很低，达不到0.05‰。其原因是地球曲率自动改正装置机械部分有故障。

The measure precision of 77 grid points of automatic rectification device of earth curvature of WILD A10 is sometimes very slow and can 't achieve 0.05 ‰ because of its mechanism obstacle .

仿真计算表明，天基观测由于不受地球曲率影响，且观测几何拉开，太阳相位角、观测距离变化范围较大，因此目标卫星视星等变化范围较大。

Theoretical calculation shows that the sun phase angle , observation distance and the brightness magnitude of the targeted satellite change significantly because of no earth curvature effect and large separation distance in position .

在考虑到地球曲率、大气无线电折射率垂直梯度、地表反射系数和地面粗糙度等因素对无线电波传播影响的条件下，推演了计算雷达波束内能量分布和气象目标物回波功率的表达式。

The equations for calculating the echo power and the energy distribution within radar beam were derived , with taking earth curvature , atmospheric refractivity gradient , reflective factor and roughness of the surface into consideration .

高频超视距雷达工作在高频段，能够突破地球曲率的限制，对视距之外的机动目标进行有效检测。

High Frequency Over The Horizon Radar ( HF OTH ) which works in high frequency band , is able to break through the earth curvature restrictions on the horizon to detect targets outside the sight .

从工程实际出发，系统研究雷达天线到目标间的电磁信号，受地形和地球曲率等因素影响而产生的多径传播问题。

The electromagnetic signal existing between the radar antenna and targets , will produce multi - path propagation problem by landform and earth curvature . This paper systematically studies the problem from the aspect of engineering practice .

此时电磁波传播的能量衰减很小，且可克服地球曲率的影响，传播距离远大于视在距离，因此可实现雷达超视距探测。

At the point the energy of electromagnetic wave propagation attenuation is very small , and it can propagate to a larger distance than the apparent range of target , that is it can reach over-the-horizon radar detection .

讨论了激光推进发动机性能参数，飞行器在无大气阻力并忽略地球曲率和自转条件下发射与入轨所要求的最佳比冲，激光平均功率与电网能量消耗等问题。

In this paper the main performance parameters of laser propulsion engine was analyzed . Such problems as the optimum specific impulse , the average laser power and the energy consumption of electric current for launching in 2D plane without air drag were addressed .

由于地球的曲率，它的传播距离大体上说只限于视线所能及的范围。

Because of the earth 's curvature . the range is , broadly speaking , limited to the visual horizon .

地球表面曲率产生的误差是收敛的，显然，在自由空间没有类似的情况。

The convergence of error brought about by the curvature of earth 's surface obviously has no counterpart in free space .

这位年近71岁的老人和他的维珍银河太空旅游公司的五名机组人员上升至新墨西哥州沙漠上空约88公里的高度，这一高度足以体验三到四分钟的失重状态，并见证地球的曲率。

The nearly 71-year-old and five crewmates from his Virgin Galactic space-tourism company reached an altitude of about 88 kilometers over the New Mexico desert - enough to experience three to four minutes of weightlessness and witness the curvature of the Earth .

与机载合成孔径雷达相比，星载合成孔径雷达由于其复杂的空间几何关系、地球自转及地球曲率等因素的影响，使得星载SAR/GMTI的实现更为复杂。

Compared with airborne SAR , such factors as complicated spaceborne SAR spatial geometric relationship , earth rotation and earth surface curvature etc. make the realization of spaceborne SAR / GMTI complicated .

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。

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 .