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Description: InSAR是一种极具潜力的新型空间大地测量方法，但它也有其固有的限制，特别是受到大气层延迟（对流层延迟、电离层延迟等）、卫星轨道误差、地表状况和时变去相关性等影响，很容易导致InSAR图像解释错误，而InSAR数据本身无法解决所存在的上述问题。而GPS可以精密定位，可以较为精确地确定电离层、对流层参数，是当前应用最广泛的一种空间大地测量手段。-InSAR is a potential new space geodetic methods, but it also has its inherent limitations. in particular by the delay in the atmosphere (troposphere delay, ionospheric delay, etc.), satellite orbit errors, Surface conditions and time-varying correlation to the impact of such very easily lead to wrong interpretation of InSAR image, InSAR data and by itself can not solve the above problems. GPS precision positioning can be more accurately determine the ionosphere, troposphere parameters, is the most widely used as a means of space geodesy.
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Size: 56119 |
Author: 张俊 |
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Description: 根据GPS观测数据，绘制电离层影像图的VC程序，可应用于气象、航天等领域。
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Size: 44986 |
Author: 顾同止 |
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Description: InSAR是一种极具潜力的新型空间大地测量方法，但它也有其固有的限制，特别是受到大气层延迟（对流层延迟、电离层延迟等）、卫星轨道误差、地表状况和时变去相关性等影响，很容易导致InSAR图像解释错误，而InSAR数据本身无法解决所存在的上述问题。而GPS可以精密定位，可以较为精确地确定电离层、对流层参数，是当前应用最广泛的一种空间大地测量手段。-InSAR is a potential new space geodetic methods, but it also has its inherent limitations. in particular by the delay in the atmosphere (troposphere delay, ionospheric delay, etc.), satellite orbit errors, Surface conditions and time-varying correlation to the impact of such very easily lead to wrong interpretation of InSAR image, InSAR data and by itself can not solve the above problems. GPS precision positioning can be more accurately determine the ionosphere, troposphere parameters, is the most widely used as a means of space geodesy.
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Size: 56320 |
Author: 张俊 |
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Description: 根据GPS观测数据，绘制电离层影像图的VC程序，可应用于气象、航天等领域。-According to GPS observation data, mapping ionospheric image of VC procedures, can be applied in meteorology, aerospace and other fields.
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Size: 45056 |
Author: 顾同止 |
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Description: 该代码为fortran代码，用来计算GPS信号的电离层延迟。用Klobuchar Ionospheric Model计算。-The code for the fortran code, used to calculate the GPS signals in the ionosphere delay. Klobuchar Ionospheric Model calculation used.
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Size: 4096 |
Author: yyb_whu |
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Description: gps导航工具包，可用于分析GPS误差，伪距及导航融合算法-This report include the review of
• Principle of Radio Navigation: navigation base on trilateration has been investigated and the over determined Eq. for navigation has been solved.
• GPS Ephemeris Data: for GPS navigation, the position of GPS satellite is very important so the by receiving ephemeris data the position of the satellite is determined.
• GPS Errors: Three different sources of errors in GPS navigation has been investigated (Ionosphere, Troposphere and Satellite clock). Ionospheric Error model is generated base on Parkinson [1] and the Tropospheric Error Model based on Hopfiel model [2].
• Simulation & GPS Toolbox: One of the targets of this work is generating Matlab GPS Toolbox and in one case study the performance of generated toolbox will be verified.
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Size: 1051648 |
Author: guoq |
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Description: 著名的GPS模糊度分解算法LAMBDA的matlab源程序 GPS软件开发必备-Well-known algorithm for GPS ambiguity decomposition in matlab source LAMBDA necessary GPS software development
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Size: 55296 |
Author: 阿发 |
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Description: 处理GPS数据，形成电离层的模型，在C#环境下的控制台。-Processing GPS data, the formation of the ionosphere model, in C# console environment.
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Size: 4096 |
Author: 刘鑫 |
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Description: 实现无线电导航的原理，基于三边测量定位对导航和GPS（全球定位系统）的实现。同时实现了，GPS广播星历参数算法，电离层误差、对流层误差、卫星等仿真-Implement the principle of radio navigation, positioning for navigation based on trilateration and GPS (Global Positioning System) implementation. While achieving, GPS broadcast ephemeris parameter algorithm, the ionosphere error, troposphere error, satellite and other simulation
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Size: 14336 |
Author: 木易 |
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Description: 利用GPS观测文件以及地面站坐标计算电离层中的总电子含量-Files, and ground stations using GPS coordinates calculation observed in the ionosphere total electron content
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Size: 7168 |
Author: 刘鑫 |
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Description: 大气闪烁程序。仿真GPS信号在电离层中传播时受到的相位和幅度的影响，是斯坦福一个教授做的，保证好使。-Scintillation procedures. Simulation of GPS signal propagation in the ionosphere by the impact of the phase and amplitude, is a professor at Stanford, and to ensure that so that.
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Size: 4040704 |
Author: Harry |
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Description: 1. what kind of noise/errors/uncertainties/unmodeled things affect
the GPS precision : AS, SA, orbits, clocks, ionosphere,
troposphere, antenna phase centers, centering (tribrachs), etc...
2. how do we evaluate GPS uncertainties ? (difference between
formal and a posteriori) can we trust them ?
3. difference between precision and accuracy (internal consistency
like repeatability is assertion of precision, comparison with other
method affected by different biases is accuracy)
4. reference frames : how do we map ? with what precision ? What
influence on results ?
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Size: 3089408 |
Author: razibaz |
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Description: 利用差分参考站和用户相对于导航卫星位置不同,引起了电波穿越电离层处的垂直TEC和角度不同是产生这种残差的主要原因,提出了一种改进的伪距差分算法并给出了定位算法。-Using differential reference station and the user with respect to the different navigation satellite position, causing the radio wave through the ionosphere at vertical TEC and angle of different residuals main reason proposed an improved pseudorange differential algorithm and gives positioning algorithm.
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Size: 543744 |
Author: cy1106668 |
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Description: 对于单频 GPS 接收用户,电离层时延是重要的测距误差. Klobuchar模型是一种计算方便、 实用可靠、 能够有
效改正GPS 单频接收机的电离层延时误差的方法. 展示模型的演绎分析和具体解算方法, 对 GPS 单频机解算程
序编写有一定帮助.- For the single frequenc y GPS user, the time delay in ionosphere is important mistake. Klobuc har is a conve-
nient and reliable model , which can recti fy the posi tion measuring delay mis take made by single f requency GPS. Display-
ing the analysis and solut ion of this model, is helpful for wri ting the single frequency GPS programe.
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Size: 129024 |
Author: luchan |
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Description: GPS伪距单点定位，包括导航文件、观测文件、精密钟差和精密星历的读取，对流层Hopfield模型，电离层K8模型，采用最小二乘法，最后通过调用matlab来计算测站坐标。对GPS编程初学者是很好的编程哦。-GPS pseudorange point positioning, including navigation documents, observation files, precision clock bias and precision ephemeris read, Hopfield model troposphere, ionosphere K8 model, using least square method, and finally by calling matlab to calculate station coordinates. The GPS program is a good program for beginners oh.
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Size: 11824128 |
Author: 周明志 |
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Description: GPS 单点定位，高度角随机模型加权，电离层K8模型改正。-GPS single point positioning, elevation weighted random model, ionosphere corrections K8 model.
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Size: 92160 |
Author: 郑黄成 |
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Description: 电离层拟合算法，包含GPS，北斗数据的加载，预处理-Ionosphere fitting algorithms, including GPS, Compass loading data preprocessing etc.
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Size: 3072 |
Author: 李奇 |
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Description: 利用GPS观测和精密星历，采用多项式或球谐函数模型的方法进行建模，能够同时估计接收和卫星DCB，在此基础山计算电离层TEC,为导航单位提供电离层延迟改正-Using GPS observation and precise ephemeris, or methods using spherical harmonic polynomial function model to model, simultaneously estimates the reception and satellite DCB, calculated on the basis of the mountain ionosphere TEC, provide ionospheric corrections for the navigation unit delay
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Size: 406528 |
Author: liulei |
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Description: 读取IGS文件（观测文件*.*o 广播星历*.*n；精密星历*.sp3；修正电离层对流层）。均是matlab函数形式，可直接用于GPS matlab数据处理-reading IGS files (oberservation file*.*o navigation files*.*n precise orbit*.sp3) correct errors of Ionosphere delay and Tropsphere delay
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Size: 10240 |
Author: 吕宏春 |
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Description: Estimate tec (total electron content) by least-sqaure adjustment using GPS
dual-frequency code observables. Ionosphere is approximated as the single-
layer model at the height of 350km with local or global tec model.
Satellite/receiver dcbs (differential code biases) are estimated as well
as tec model coefficients.
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Size: 595968 |
Author: tichysu
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