查询词典 GPS

The second part of this paper discusses the theory of SAR spacecraft autonomous orbit determination using on-board GPS.

论文的第二部分讨论了SAR卫星采用GPS技术进行自主定轨的基本原理和方法。

And the progress of kinematic orbit determination of low orbit satellites based on GPS and studies related are discussed.

在运动学定轨中，有效的卫星跟踪个数和好的GPS数据质量是很重要的。由于周跳和粗差可以大大的降低最终轨道的精度，因而周跳探测和粗差处理是运动学定轨处理中一项非

According to the mathematical models of GPS positioning and orbit determination, some programs were compiled for data testing.

基于GPS 定轨定位原理及数学模型，编制了相应的仿真程序。

Algorithms of on-board GPS real-time single point positioning and dynamic orbit determination using positioning solutions are mainly studied.

本文重点研究星载GPS单点实时定位和基于单点定位结果的动力学定轨方法。

GPS ; broadcast ephemeris ; satellite coordinates ; orthogonal polynomial ; curve-fitting

GPS ；广播星历；卫星坐标；正交多项式；拟合

It consists of 10 subsystems, 122 alarm received and disposed system, Traffic Signal Control System, Municipal Road monitor system, traffic management system, Communication and transition System, Electronic Police System, traffic accident statistic and analysis software, GIS/GPS System, visual detection system to monitor traffic flow, and traffic peccancy system.

它包含10个子系统，即：122接处警系统、交通信号控制系统、城市道路监控系统、交通业务管理系统、通信与传输系统、电子警察系统、事故黑点排查系统、 GIS/GPS 系统、视频交通流量检测系统、交通违章管理系统。

A new method to decide GPS satellite position using the broadcast ephemeris is presented, the way to checkup the precision is also given, and some research are made to analysis the error feature of the position which is calculated hy the broadcast ephemeris as well, the results show the error is periodic.

GPS卫星高度角、方位角计算方法众多，但精度低；针对这点，提出了一种利用广播星历计算卫星高度角、方位角的方法，对该方法能够达到的精度提出了鉴定的途径，并分析了利用广播星历计算卫星高度角以及方位角的误差特点，结果表明利用广播星历计算的卫星高度角、方位角呈现出周期性变化的规律。

An algorithm that performs velocity measurement with partial GPS signals based on Periodogram Spectral Analysis method was proposed.

考虑在瞬时信号情况下GPS的测速问题，针对片段信号的特点提出了基于经典谱估计方法测量载体速度的方法。

The next point to be staked is a common issue in the GPS RTK staking. It is proposed in this paper that the coordinate of a certain point be used to determine its direction and perpendicular distance from the road center.

在GPS RTK道路中线测设时，常遇到下一个点在何处的问题，做法是随测一个点的坐标，反算出该点趋向道路中线的方向与垂距，在行进之中，实现导向与导距。

The pharos is controlled by reliable program. Working status data is collected in real time. A two-stage amplifier is used to sense the current signal. VHF transmitter-receiver is used as the means of communication, which is working at 233. 3MHZ. GPS data is collected to calculate the latitude and longitude valued of the pharos. Sleep mode is used to reduce the energy consumption. Auto alarm function and watch dog function are integrated to maintain its stability and reliability.

在用高性能8位处理器68HC908SR12设计的新型遥控遥测航标灯中，充分利用了处理器的功能，实现了对灯器的程序化控制，实时进行数据采集，采用了两级放大器对电流信号进行放大，采用VHF电台进行远程通信，对GPS定位数据进行采集和处理，为了降低功耗实现了定时和睡眠控制，为保证工作稳定性和可靠性，启动了故障处理、自动报警功能，以及看门狗功能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。