全球定位系统

2017 Vol. 42, No. 1

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The Time and Spatial Characteristics Analysis for Beidou Navigation and Positioning Service Performance

CHE Zhanwu, CHANG Zhiqiao, FAN Meijun, WANG Qiang

2017, 42(1): 1-5. doi: 10.13442/j.gnss.1008-9268.2017.01.001

[Abstract](466) [PDF 612KB](158)

Abstract:
In order to make a comprehensive assessment of service performance for Beidou Satellite Navigation System since the service in operation formally, four positioning models which are B3 singlefrequency positioning, B1／B3 dualfrequency positioning, B3 singlefrequency differential positioning and B1／B3 dualfrequency differential positioning are given in this paper firstly, and then positioning strategy is designed to take into account IODE／IODC ephemeris and clock age, and last the time and the spatial characteristics of 4 kinds of positioning model are analyzed and evaluated using the continuous monitoring network data in the Chinese region. The continuous three year results of Beijing area,Hainan and Xinjiang area is presented.

Application of Adaptive Strong Tracking Kalman Filter Based on Fuzzy Logic to GPS Positioning

HU Hui, YAN Yujun, OU Minhui, PENG Xiongming

2017, 42(1): 6-11. doi: 10.13442/j.gnss.1008-9268.2017.01.002

[Abstract](457) [PDF 687KB](96)

Abstract:
When the velocity of carrier frequently was mutated, Kalman filter have strong dependence of system model and poor robustness in GPS positioning computation. A new improved strong tracking Kalman filter based on fuzzy logic adaptive controller is presented. By monitoring the residual mean, the fuzzy logic adaptive controller of this method dynamically adjusts the softening factor according to fuzzy rules. For this reason, this method modifies the fading adaptively and achieve the inhibition of carrier mutation. The results of simulation indicate that this new approach has a better accuracy than the extended Kalman filter and strong tracking Kalman filter in the field of maneuvering target tracking in carrier mutation, its stability are also improved.

Discussion on the Coordinate Maintenance of BDS Monitoring Station

CAO Jiefang, BI Zaikuan, DONG Haijing, NIE Guoxing, HAN Xuefeng

2017, 42(1): 12-15. doi: 10.13442/j.gnss.1008-9268.2017.01.003

[Abstract](381) [PDF 548KB](85)

Abstract:
The monitoring stations of BeiDou 2nd generation navigation satellite system are built based on the 1st generation system, for the convenience of management, monitoring antennas are installed on the roof of the monitoring station. So their stability are not enough. At the same time, the coordinate system of BeiDou 2nd generation navigation satellite system is 2000 China Geodetic Coordinate System (CGCS2000) at present and the calculation error is out of range. According to these problems, the effect of timevarying and ground subsidence are analyzed in this paper, and the error order of magnitude processed by methods of time varying effect is also pointed out at present. We discuss the initial implementation and refinement realizations of the World Geodetic System 1984(WGS84) frame, which used as the terrestrial reference system for GPS. Finally, for the situation of BDS monitoring stations, we propose to set up coordinate time series through Global Navigation Satellite System (GNSS) continuous observation to maintenance the coordinate of monitoring station. Some suggestions are put forward for the monitoring station construction, data processing etc

A Study on Antenna Relative Phase Center Variation

DENG Ke, HAO Jinming, CHEN Yilun, YANG Dongsen

2017, 42(1): 16-21. doi: doi:10.13442/j.gnss.1008-9268.2017.01.004

[Abstract](416) [PDF 613KB](136)

Abstract:
In high precise positioning, GNSS receiver antenna phase center variation is an error must be corrected. For normal users, they have no experimental equipment for the calibration technique in anechoic chamber or the filed calibration technique with robot. Compared with above calibration techniques, the relative calibration technique are easy and operability. This paper used this calibration technique to calibrate the GNSS receiver antenna PCV. The results showed that the accuracies of this technique is 3mm, so this technique could be used for calibrating another GNSS receiver antenna and BDS receiver antenna. We analysis the influence factors for detection precision, and present some useful conclusions.

′The Belt and Road′ Surrounding Areas BDS Dynamic Positioning Performance Analysis

XU Wei, GENG Jiawei, WANG Tao, LU Li, DU Wenxuan

2017, 42(1): 22-27+38. doi: 10.13442/j.gnss.1008-9268.2017.01.005

[Abstract](347) [PDF 806KB](103)

Abstract:
In this paper, uses STK software for BDS global network constellation structure to sign the current structure of the simulation, the dynamic changes of the areas along “The Belt and Road” minimum visible satellite number, GDOP value, and the positioning precision of the positioning performance. The results show that, BDS has been able to cover most areas of “The Belt and Road”, China, Southeast Asia, South Asia and other regions of the positioning accuracy is better than 13meter,but the accuracy of positioning in small parts of Northern Europe, Eastern Europe and West Asia has yet to be improved. The GEO satellite over the GEO／IGSO satellite of “The Belt and Road” surrounding areas along the role to the improvement of the positioning accuracy. In addition, with the increase of the number of visible satellites, the GDOP value decreased gradually, but when the visible satellite number reaches a certain value, with the increase of the number of visible satellites, the GDOP value decrease is not significant, that means increasing the number of visible satellites is not certain can improve the positioning accuracy.

PANDA Static PPP Solutions with Different Strategies

XUE Yingjun, GUO Jinyun, MAO Jijun, LIU Zhimin

2017, 42(1): 28-33. doi: 10.13442/j.gnss.1008-9268.2017.01.006

[Abstract](403) [PDF 773KB](78)

Abstract:
The data processing strategy of PANDA software precise point positioning are analyed,and using the GPS data of 81 stations in SDCORS network for the first week of 2012 to carry out the static precise point positioning. The single day solution of one week for each station are analysised,the accuracy and reliability of the software precise point positioning in Shandong area are verified.The effect of the precise point positioning accuracy on different satellite cut-off angle,different mapping function,different ephemeris products,different length of observation data are studied. The conclusion indicates that when the satellite cutoff angle is set to 10 degrees, using GMF mapping function, using the precise ephemeris and clock correction, observation data for more than 18 hours, PANDA software static precise point positioning accuracy can reach 2 cm.

Research on Different Stochastic Model in GPS Single Epoch Position Resolution

CHEN Xibin

2017, 42(1): 34-38. doi: 10.13442/j.gnss.1008-9268.2017.01.007

[Abstract](370) [PDF 530KB](77)

Abstract:
Analyzing the common conditions of four kinds of stochastic model based on the importance of GPS single epoch solution. It is defined the applicability conditions of different stochastic models, according to analysising and comparing the results and std of mobile station from baseline example. it provides bases for further improving the positioning accuracy of GPS single epoch.

Research on Configurable Multimode GNSS Signal Acquisition Technique

CHENG Yawen, GUO Chengjun, ZHANG Xinxin

2017, 42(1): 39-43. doi: 10.13442/j.gnss.1008-9268.2017.01.008

[Abstract](324) [PDF 613KB](100)

Abstract:
This paper first analyzes the differences between the four satellite systems, discusses the possibility of deal with multiple satellite signal compatibly. Then, a multimode satellite signal baseband processing structure is designed with configurable idea. The acquisition of GPS L1, BDS B1I, GLONASS L1 and GALILEO E1B codes are analyzed. By setting the initialization parameters, you can configure the key parts, so that in each treatment process can handle a particular satellite signal. Finally, the simulation of partial subunit is carried out by using Verilog HDL, which verifies the feasibility of the design.

Research on the Spatio Temporal Characteristics of IGS Ionospheric Products

YUAN Fei, LI Yingbing, MIAO Ge

2017, 42(1): 44-48. doi: doi:10.13442/j.gnss.1008-9268.2017.01.009

[Abstract](502) [PDF 678KB](97)

Abstract:
The research on the temporal and spatial variation of ionosphere has important value for satellite navigation, aerospace and so on. This article uses international GNSS services (IGS) products, analyze the ionospheric temporal and spatial variation. On the time scale, doing the Power spectrum analysis on the loworder spherical harmonic coefficient of (0,0)、(1,0)、(1,1)、(1,-1), and the shorttime Fourier transform of the total vertical electron content (VTEC) in the Beijing area was analyzed. Seasonal analyzes were conducted in Beijing, Accra and Melbourne, the results show that ionospheric changes have obvious annual and semiannual cycles. In the space aspect, the variation rules of the latitude and longitude of the ionosphere delay on the zero meridian and equator are analyzed. The results show that there is a single peak effect in the latitudinal direction, and the peak value in the longitude direction has a delay variation

Design and Implementation of GNSS Receiver Test System Base on Software Defined Radio

CAO Xiaoliang, GUO Chengjun

2017, 42(1): 49-52+64. doi: 1008-9268（2017）01-0049-05

[Abstract](177) [PDF 545KB](85)

Abstract:
To settle the current problems in the test and quality evaluation of GNSS receiver, the paper proves the necessity of constructing GNSS receiver test system which is under unified test and evaluation standards.On the basis of analyzing the architecture of Software Defined Radio, combining the feature of GNSS receiverin the test and quality evaluation, the paper put forward GNSS Receiver Test System Base on Software Defined Radio. By constructing this kind of test system, the functionalities and performance of GNSS receiver can be tested and evaluated comprehensively and accurately in a standardized way.

Positioning Performance Comparison and Analysis on BDS Dual and Triple Frequency Static Precise Point Positioning

2017, 42(1): 53-58. doi: 10.13442/j.gnss.1008-9268.2017.01.011

[Abstract](683) [PDF 678KB](150)

Abstract:
At present, only the BDS provides triple frequency observation data, and different linear combination models of observation data influence positioning accuracy and convergence speed of Precise Point Positioning (PPP). This paper deduced the optimal mathematical model of BDS three frequency ionosphere free combination PPP, and carried out experiment of BDS dualand triple frequency static PPP, using a large amount of measured data. The results show that, triple frequency static PPP obviously improves the positioning accuracy and convergence speed, compared to the BDS dualfrequency static PPP. BDS triple frequency static PPP can reach absolute positioning accuracy of 2～3 cm, with dualfrequency GPS PPP levels.

Application of Elevation Based Multipath Correction Model in BDS Relative Positioning

CAI Renming, SUN Fuping, XIAO Lejie, PENG Wensheng, WANG Haoyuan

2017, 42(1): 59-64. doi: 10.13442/j.gnss.1008-9268.2017.01.012

[Abstract](316) [PDF 600KB](71)

Abstract:
The accuracy of pseudorange observation has a great impact on the rate of relative positioning solution convergence.Related research found the exist of multipath deviation in the BDS pseudorange observation,which is associated with evelation angle and severely reduces the pseudorange observation precision.By the EMD filter and polynomial fitting we established a multipath correction model based on elevation angle to eliminate this kind of error.Experimental results show that the multipath correction model based on elevation angle can effectively improve the accuracy of pseudorange observation, and speed up the rate of relative positioning results convergence.After correction the precision of four times 2 h positioning results increased by 64.1％, 43.9％, 35.3％ and 43.9％ respectively.

The Data Communication Based on Beidou GBAS

LIU Tianheng, CHEN Mingjian, ZHANG Shuwei, ZHOU Runyang, LI Ying

2017, 42(1): 65-69+73. doi: 10.13442/j.gnss.1008-9268.2017.01.013

[Abstract](380) [PDF 611KB](106)

Abstract:
Data communication is an indispensable part of improving the navigation accuracy and positioning accuracy of the Beidou GBAS, and plays a key role in the system. Based on the Beidou GBAS, the paper gives a brief introduction to the system, and discusses the TCP／IP and RS232 mode used by the reference station and the data center for data communication. For the user and data center, the paper analysis of the NMEA0183 information, NRTIP and RTCM data, describes the improvement of RTCM3.2 over the previous version. Finally, the paper summaries the role of data communication in Beidou GBAS, and prospects the application foreground.

A New Method of NMEA0813 Protocol Parsing

LIU Fushan, GUO Chengjun, JIA Zhendong

2017, 42(1): 70-73. doi: 10.13442/j.gnss.1008-9268.2017.01.014

[Abstract](752) [PDF 476KB](141)

Abstract:
NMEA0183 protocol parsing module is crucial in a navigation system software module, the module of the robustness and efficiency is directly related to the performance of the whole navigation system. In order to timely and effective resolution NMEA data flow, separate processing NMEA data flow analysis and data display, reduce the coupling of parsing module and display module, put forward a kind of based on regular expressions, and based on the MVC architecture of NMEA0183 protocol parsing methods.The whole parsing module can be divided into four stages, the original NMEA data stream storage, NMEA data flow efficient parsing, NMEA data validation, NMEA data show.At present the method has been applied to the GPS navigation products, the measured show that the analytical module, high efficiency and reliable data flow analysis showed good realtime.

A Method of Estimating DCB of the GNSS Receiver by Using the Signal Simulator

LIU Yiwen, LIU Chengyu

2017, 42(1): 74-76+94. doi: 10.13442/j.gnss.1008-9268.2017.01.015

[Abstract](62) [PDF 502KB](5)

Abstract:
DCB is the main error term while measuring the total electron content of the ionosphere based on the GNSS dual-frequency beacons.A method is proposed in this paper to estimate the GNSS receiver DCB by measuring the simulated TEC from GNSS simulator.Hardware-in-the-loop experiment has been carried out to test the validity of the proposed method.The results show that the average DCB of the tested GNSS receiver was about16.067 ns with the accuracy of about 0.14 ns.It proves the effectiveness of the presented method,which could be a useful way in GNSS receiver performance evaluation and calibration.

Research of Orbit Determination Based on GAMIT／GLOBK

CAO Bingqiang, XU Changhui, CHENG Yingyan, YU Xinping, PANG Xiaodong, LI Yubo

2017, 42(1): 77-81. doi: 10.13442/j.gnss.1008-9268.2017.01.016

[Abstract](310) [PDF 621KB](100)

Abstract:
This paper introduces the application of GAMIT／GLOBK in satellite orbit determination,the parameter setting and the steps of GAMIT／GLOBK orbit determination are introduced in detail. Then the global and regional orbit determination is carried out based on the broadcast ephemeris as initial orbit information. And the accuracy of the orbit determination is analyzed further.

Sub network Division Analysis in the High accuracy Data Processing of SDCORS

ZHANG Qinghua, GUO Jinyun, ZHOU Changzhi, [JZ]JIANG Yingming, ZHANG Haiping

2017, 42(1): 82-89. doi: 1008-9268（2017)-01-0082-08

[Abstract](119) [PDF 950KB](70)

Abstract:
Based on the characteristics of SDCORS’s large quantity and complex network, five subnetwork division schemes are proposed to process observation data of SDCORS using the GAMIT／GLOBK. The oneday result of the whole network solution scheme is served as a standard, and five subnetwork division schemes are compared with the whole network solution scheme to choose the better one. Whether the scheme is in accordance with the direction (eastmiddlewest three subnetworks, southmiddlenorth three subnetworks, eastwest two subnetworks, southnorth two subnetworks) or according to the type of receiver to divide subnetwork,the results showed that every scheme can improve efficiency and reach the level of mm accuracy. What’s more, comparing the baseline accuracy of each division scheme with the whole network solution scheme, the relative accuracy of the baseline may achieve10^-8level, which can meet the requirement of highprecision measurement. The point difference was within 2.5 mmwith the southnorth subnetwork division scheme, achieving the highest accuracy.

A Method of Estimating DCB of the GNSS Receiver by Using the Signal Simulator

ZHANG Shuwei, CHEN Mingjian, LIU Tianheng, ZHOU Runyang, ZUO Zong

2017, 42(1): 90-94. doi: 10.13442/j.gnss.1008-9268.2017.01.018

[Abstract](434) [PDF 560KB](63)

Abstract:
The higher level of positioning accuracy and realtime performance would be reached if receivers can achieve more prior information in the precise point positioning. In the undifferenced uncombined PPP, if the ionosphere delays supplied by augmentation stations can cover the precision demand, the estimated parameters must be less, the model must be more robust, the position precision must get better. In this paper, interpolation models has been discussed, a comparison in accuracy of interpolation of atmospheric correction has been done.,a new method named planar double spline curve interpolation has been delivered. The experimental results show that when the interpolation model is appropriate, the precision level of interpolation correction can meet the requirements of PPP.

Precise Point Positioning Based on the RTKLIB and ]the Analysis of Result

PAN Jundao, WEI Zhaochuan, YANG Ke

2017, 42(1): 95-99. doi: 10.13442/j.gnss.1008-9268.2017.01.019

[Abstract](1021) [PDF 559KB](175)

Abstract:
Based on the existing framework of RTKLIB, we analyze the main error model in precise point positioning and complete the precise point positioning solution by calling the error correction model algorithm. The analysis of positioning error shows that the error in three directions of X,Y and Z is 01 meters in 80 epochs, and gradually decreases to stabilize. The positioning error is 7 cm at 180 epochs..

Research on the Strategy of American GPS Modernization

WANG Xiaoni, ZHAO Zizheng, HAN Chao

2017, 42(1): 100-103. doi: 10.13442/j.gnss.1008-9268.2017.01.020

[Abstract](465) [PDF 403KB](113)

Abstract:
This paper analyzes and studies the GPS modernization strategy from three aspects. First, it analyzes the internal and external environmental factors of GPS modernization in the United States, points out the essence of GPS modernization in the United States, and then analyzes the content of GPS modernization in the United States, and points out its planning process and advancement situation. Finally, it analyzes the national space security strategy and space policy. The impact of GPS modernization is discussed. This article has some guiding significance to the development of BDS in China.

Comparing and Analyzing for Chinese GNSS Data Processing Software

SUN Guopeng, LI Jiansheng, HAO Xiangyang, ZHANG Xiaodong

2017, 42(1): 103-107. doi: 10.13442/j.gnss.1008-9268.2017.01.021

[Abstract](406) [PDF 635KB](92)

Abstract:
In recent years, the development of BDS has greatly promoted the evolution and progress of the domestic GNSS data processing software. In this paper, three commercial softwares including HGO, CGO and South GNSS software have been studied by keeping the threshold elevation angle and sampling frequency the same, the quality of baseline calculation, the position accuracy after netadjustment, and the baseline processing results under BDS and GPS are compared and analyzed. Experiments show that the three commercial softwares are relatively mature, and can meet the D grade GPS control network engineering measurement accuracy requirements. The results of the baseline vector and net adjustment by HGO software are slightly better than the other two kinds of softwares.

The Application of Cubic Spline Interpolation for the Leo Satellite

WU Chuanlong, SONG Shize, WANG Dingwei

2017, 42(1): 108-110. doi: 10.13442/j.gnss.1008-9268.2017.01.022

[Abstract](329) [PDF 279KB](85)

Abstract:
The cubic spline interpolation function is selected to calculate orbit data of the GEO or IGSO satellite in this article. The results of the cubic spline function do not show the runge phenomenon, but the interpolation model contains obvious randomness of the system error. So we take least squares configuration to process the result of the cubic spline interpolation.The result manifests that the accuracy is improved by more than about 10 times.

GPS PPK Technology Application in Offshore Underwater Topographic Survey

DU Rui

2017, 42(1): 111-113. doi: 10.13442/j.gnss.1008-9268.2017.01.023

[Abstract](351) [PDF 322KB](66)

Abstract:
In the offshore area of underwater topographic survey, access of surface elevation become a technical problem , GPS PPK technology for the surface elevation transmission can achieve higher precision, meet the requirements of the project.

Integrated Application of Geological Disaster Monitoring and Forewarning System Based on HNCORS

LIU Ziping, WU Linghui, CHEN Chunhua, AO Minsi

2017, 42(1): 114-117. doi: 10.13442/j.gnss.1008-9268.2017.01.024

[Abstract](181) [PDF 517KB](84)

Abstract:
This paper discusses mainly the comprehensive use of GNSS space positioning、computer network communication、3G network and other technologies, and real-time monitoring,analysis and Forewarning of surface displacement for the monitoring points. Introduce the main function and Implementation process of the geological disaster monitor-ing and forewarning system based and HNCORS, to provide feasible technical support for the geological disaster harm monitoring and forewarning work.

Analysis of Data Pre-processing and Quality Checking Based on TEQC

WANG Fulin, YU Guangrui, WANG Long

2017, 42(1): 118-121+126. doi: 10.13442/j.gnss.1008-9268.2017.01.025

[Abstract](327) [PDF 503KB](79)

Abstract:
The basic working principle and usage of TEQC are introduced. The application of TEQC in the quality assessment of crustal movement observation network in Hebei Province is analyzed. The consequence shows that all the indicators meet the requirements of experience values and the data quality is high, the information of the quality of the continuous observation data can be effectively understood by using TEQC.

Design of Hybrid Energy-saving Tuna Longline Propulsion Based on Beidou Satellites

WANG Yongding, TIAN Chenxi, DONG YaLong

2017, 42(1): 122-126. doi: 10.13442/j.gnss.1008-9268.2017.01.026

[Abstract](216) [PDF 585KB](52)

Abstract:
The rapid development of China’s offshore fishing, alone with rising fuel prices, there has been fishing boats’ energy and environment issues. When tuna longline is working, the diesel engine is in the low speed and low load operation conditions which cause higher fuel consumption. In order to stabilize the economic benefits of offshore capture fisheries and reduce energy and consumption, hybrid tuna longline system based on Beidou satellites is presented in this paper. This system consists of two power sources: the diesel engine and the electric motor. According to Beidou satellites, the system could choose different power sources based on position and speed. Compared with conventional hybrid tuna longline, the general fuel consumption can reduce 13％ under the same condition and the same working time. And also the system reliability and propulsion efficiency are improved.

Design and Implentation of the Wave Energy Power Generation Device Communication System Based on BeiDou Positioning Research

YANG Qianwen, WANG Shiming

2017, 42(1): 127-129. doi: 10.13442/j.gnss.1008-9268.2017.01.027

[Abstract](265) [PDF 360KB](79)

Abstract:
As well as oil, natural gas and other resources, as for the wave energy is the highest energy for the ocean waves,already have been a hot topic technology to conquer in recently years. As another core technology of wave energy power generation system, this paper according to the characteristics of the wave energy itself unique design of the communication system, Through BeiDou positioning to realize timely monitoring of equipment, can effectively reduce the loss of equipment, equipment data are obtained,contribute to the utilization of clean energy increase.