电离层

This research process the ionosphere-free triple-differenced carrier phase observation which consist of double frequency GPS observations from the GPS receiver carried on the CHAMP and 40 IGS tracking stations. Besides, the tropospheric correction model, solid earth tide correction, mass center correction of the satellite, earth rotation correction and antenna phase center correction are incorporated. Finally, determine the satellite short-arc orbit with the pure geometry, kinematic, method.

本研究利用CHAMP卫星上装载之GPS接收器所接收之双频观测量与地面上40个IGS追踪站组成三次差分无电离层观测量，并改正观测量中之对流层误差、固体潮误差、质量中心改正、地球自转、天线相位中心偏差等误差量，以纯几何之动态法求定低轨卫星之短弧轨道位置。

However, a 1990 government document indicates that the radio-frequency power zap will drive the ionosphere to unnatural activities.

但是，一份1990年的政府文件表明无线电射频能量攻击将使得电离层发生非自然活动。

Starting from ray equation, the ray parameters can be solved by using the Runge\|Kutta method.

从射线的矢量微分方程出发，采用龙格-库塔方法求解射线参数方程，实现了电离层中的射线追踪。

It is shown that under the action of the shock, the region I current moves towards the midnight, accompanied by a successive occurrence of two FAC structures: an anomalous FAC pair of opposite direction to the region I current and a new region I current of the same direction.

模拟结果表明，在激波的作用下，电离层Ⅰ区电流系统向子夜方向运动，在向阳侧相继出现与原Ⅰ区电流反向的异常场向电流对和同向的新生Ⅰ区电流对。

A sky wave that is reflected by the ionosphere.

通过电离层反射回来的天波。

Based on the current continuity equation, using spherical harmonic function expansion, where lower boundary condition is the surface atmospheric electric potential, upper boundary condition is the electric potential of the bottom of the ionosphere, and non-homogeneous current source function of the vertical dipole assumptions is used for the charging of thunderstorms, the state analytical solution of global atmospheric electricity model in lower atmosphere is gotten.

本文从电流连续方程出发，采用球谐函数展开法，边界条件采用下边界为地表大气电势，上边界为电离层底部电势，非齐次电流源函数项采用垂直偶极子假设。

S. standard atmosphere, we find that the heterogeneity appeared at the height of 350km above the ground.

理论计算表明，该不均匀体发生在电离层扩展F区，高度在350km左右。

Standard atmosphere, we find that the heterogeneity appeared at the height of 350km above the ground.

理论计算表明，该不均匀体发生在电离层扩展F区，高度在350km左右。

Ionosphere is a non-linear response system. Different kinds of input will trigger different final perturbations.

电离层是一个非线性响应系统，不同触发因素作用后生成的输出扰动不同，因此对电波传播的影响也不同。

Several usual models for troposphere delay and ionosphere delay are discussed and their influences to different time transfer methods are analyzed.

本文讨论了几种常用的对流层延迟和电离层延迟模型，分析了它们对各种时间比对方法的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。