系统误差

Then it can obviously reduce the frequency and the need of the real time computation of the main station, and the telecommunication between the main station and tracking stations as comparison with the tradition WADGPS.

该系统的特点是降低数据通讯链工作频度和实时性的要求，并通过增设区域性差分基准站来计算卫星相对钟误差和电离层改正，以减少主控站的计算工作量。

As main part of this thesis, the responses of the ionosphere on solar flare radiation are analyzed by means of GPS method, which is the first time in the world to analyze this kind of ionospheric disturbance using GPS method.

本论文在分析GPS系统以及空间环境对其影响的基础上，归纳出了一个简单有效而高精度的利用双频GPS数据进行电离层扰动研究的数据处理方法；分析了该方法的各种误差源及其修正；并利用该方法研究了发生于电离层中的多种背景和扰动形态。

They are differentiated twice with approximate ideal differentiators to obtain the corrected accelerogram.

本文通过对数字强震仪系统使用的力平衡加速度计的仪器响应误差进行分析，提出了一个校正仪器响应失真的处理方法，即对未校正记录做低通滤波后运用近似理想微分器做两次微分得到校正加速度记录。

In order to improve the precision, a new system is presented to measure the optical activity based on the theory of polarization interference. The measurement result for a quartz crystal optical activity shows that the relative error is less than one percent and the precision and effeet is improved a lot than the traditional one.

为了提高测量精度，设计了一种利用偏振光干涉法测量物质旋光率的新系统，并对石英晶体旋光性质进行了测定，测量结果的相对误差小于1%，实验证明其测试精度和使用效果都比传统方法有了明显的提高。

Based on the oversampling of OFDM frequency response, this paper proposes a method called LS+LPF.

利用在OFDM系统中信道的频域响应是过采样的特性，提出了LS+低通滤波器的方法，将其与带低通滤波器的sisin(x/x插值法、cubic插值法和Winner插值法进行了信道估计的均方误差和无编码的误比特率的仿真结果进行了比较。

Based on the study of the system model in different flight conditions, and by use of real-time compensation in inertial guidance, a method is put forward for selecting the error compensation model and the model of compensation evaluation based on the engineering background.

通过研究飞行工作环境变化导致的系统模型差异，结合惯性制导实时补偿方法，提出了基于工程背景的误差补偿和补偿评估模型的选取方法。

The star calibration system, which is one of methods to calibrate precision and adjust tolerance of tracing and measuring devices in fields, has been widely applied to high precision tracing and measuring devices such as photoelectric theodolites, radars , etc.

星体标校系统是实现跟踪测量设备外场精度标校和误差调整的方法之一，广泛应用于光电经纬仪、雷达等高精度跟踪测量设备中。

Then a posteriori robust Kalman filter is proposed, which can guarantee a variance bound of the filtering error.

该算法为一离散验后滤波算法，它能保证区间系统的滤波误差有界。

The uncertainties of the pvT measurements were carefully analyzed.

详细分析了pvT实验系统的测量不确定度及误差传递规律。

The major issues with GPS, namely 2 feet vertical guidance accuracy near the runway threshold and the integrity of the system has not been able to match historical ICAO standards and practices.

gps主要的问题是，跑到末端的垂直导航精确度是2英尺，系统的完整性（就是没有人为因素可以增加导航误差。。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失