全球定位系统

2017 Vol. 42, No. 3

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INS／Magnetometer Fused Localization Algorithm Based on Particle Filter

XIA Jingping, HU Hui, OU Minhui, YAN Yujun

2017, 42(3): 1-6. doi: 10.13442/j.gnss.1008-9268.2017.03.001

[Abstract](506) [PDF 635KB](73)

Abstract:
GPS signals are more likely to be blocked or reflected by tall buildings in urban canyons, resulting in poor positioning accuracy even positioning failure to smart terminal. Based on the analysis of the GPS location error in urban canyons, horizontal velocity of INS and Azimuth of magnetometer data are fused by particle filter to positioning based on smart terminal. Experimental results show that the average error of proposed algorithm is 3.19m,which is reduced by 76.9％ compared to 13.81 m of GPS, and also reduced 34.1％ and 33.8％ compared to 4.84 m of EKF and 4.82m of UKF fusion algorithm.

区域电离层TEC建模及其在磁暴上的应用

WANG Xueyan, GUO Chengjun

2017, 42(3): 7-10. doi: 10.13442/j.gnss.1008-9268.2017.03.002

[Abstract](412) [PDF 436KB](123)

Abstract:
Itmainly introduces the method forresolving the differential code bias of satellites and stations, and uses the loworder spherical harmonic function model to estimate the parameters of the system hardware delay, 10 IGS stations from European region are chosen as a net, a VTEC model is calculated every 15 minutes, The accuracy and stability of the results are compared with the results published by IGS. The calculated results are in agreement with the results of IGS. For the magnetic storms occurring on March 17, 2015, the electronic content of the ionosphere over the station is studied by using the electronic content adjusted with the differential code bias. It shows that it can reflect the magnetic storm phenomenon better.

Study on the Algorithm of Quick Select Satellite in Beidou／GPS Dual-mode Positioning

PENG Sibo, GUO Chengjun, LIU Fushan

2017, 42(3): 11-14. doi: 10.13442/j.gnss.1008-9268.2017.03.003

[Abstract](569) [PDF 464KB](93)

Abstract:
With the continuous development of satellite navigation, following the US government first realized the GPS global positioning system, China has also developed independent intellectual property rights of the Beidou navigation system.The emergence of different satellite navigation systems makes it possible to use dualsystem integrated navigation and positioning.Using a dual system combination positioning mode, the navigation receiver can receive more than 20 visible stars at the same time, which greatly increases the number of visible stars, providing a very precise positioning.But the number of visible satellites increased significantly to bring positioning accuracy at the same time also brought a lot of calculation, coupled with the actual operation of some of the problems, have greatly increased the election time.Based on the relationship between GDOP and constellation geometric layout, this paper proposes a satellites selection algorithm based on elevation and azimuth.The method is based on the requirement of positioning and filter based on the elevation of visible satellite, reasonable choice of different elevation satellites, follow the principle of uniform satellite distribution, will be find an effective positioning balance in the ideal situation and the actual situation, to avoid the ineffective selection of satellites and reduce the amount of computation, thus greatly reducing the satellite selection time.This method effectively achieved quick selecting satellite in Beidou／GPS Dualmode Positioning

Sea Surface Slicked Oil Detection Using GNSS-R Simulation

CHEN Shanshan, ZHANG Yun, HONG Zhonghua, HAN Yanling, XIE Xiangfang

2017, 42(3): 15-19. doi: 10.13442/j.gnss.1008-9268.2017.03.004

[Abstract](490) [PDF 602KB](78)

Abstract:
Oil spill has become one of the important effects of pollutants in the marine ecological environment, in the last 40 years, there have occurred about 3200 oil spill accidents in China. The remote sensing monitoring of ocean oil spill is the main optical and radar satellites, which generally exhibit shortcoming that a long revisited period, however oil spills often result in immediate and longterm serious environmental pollution, and it need to rapidly and accurately monitor oil spill conditions. Global Navigation Satellite System reflected signals (GNSSR) technology has the characteristic of allweather availability, hence, it is more suitable for the detection of oil spills. To assess the feasibility of the GNSSR simulation in detecting the oil slicks, the GNSSR coastal simulated experiment was performed on the oil slick distribution of an oil spill accident, which occurred in Qingdao, China, 2013. In this paper, the DelayDoppler Map (DDM) is conducted by combining the MeanSquare Slope (MSS) model for oil slicked／clean surfaces and the ZavorotnyVoronovich (ZV) scattering model, which can reflect the characteristics of the GNSS scattering signals of the sea surface condition. The simulation results show that oil slicks are clearly distinguishable from the DelayDoppler Map, and therefore it can verify the feasibility of oil slicks detection by using GNSSR technology.

Optimal Design of Interference Source Based on Ant Colony Algorithm

ZHANG Xinxin, GUO Chengjun, CHENG Yawen

2017, 42(3): 20-26. doi: 10.13442/j.gnss.1008-9268.2017.03.005

[Abstract](370) [PDF 796KB](63)

Abstract:
In the new form of electronic warfare against war, the implementation of effective interference with satellite navigation will greatly weaken the enemy's combat capability. In order to implement effective interference to a particular area, the choice of deployment scheme for interference sources is critical. In order to achieve the desired interference effect, this paper models the deployment problem of satellite navigation jamming based on the principle of suppression and deceptive jamming and the characteristics of modern warfare, and chooses the jamming benefit and average risk index The multiobjective combinatorial optimization model, and the ant colony algorithm to optimize the deployment plan. Simulation analysis shows that the chaotic ant colony algorithm can effectively optimize the deployment plan of jamming sources and realize effective interference to satellite navigation.

Research on BOC(2n,n) Signal Based on Improved CCFR Algorithm

XU Liguo, WANG Yongming

2017, 42(3): 27-31. doi: 10.13442/j.gnss.1008-9268.2017.03.006

[Abstract](319) [PDF 523KB](70)

Abstract:
With the development of satellite navigation signals, BOC modulation signals are widely used, however, according to the latest researches, BOC signals have faced new challenges in the synchronization acquisition.Considering the drawbacks of existing methods in side peaks suppression, researching the characters of BOC (2n,n) and putting forward CCFR(Crosscorrelation Function Reconstruction) base on the connection of multichannel correlation function. Through theoretical study and simulation, CCFR algorithm can eliminate the first side peaks and may inhibit other subpeak times. In addition, the performance of side peaks suppression is superior to existing algorithms.

Precision Analysis of Single Point Positioning Model with GPS／GLONASS／BDS

WANG TAO

2017, 42(3): 32-37. doi: 10.13442/j.gnss.1008-9268.2017.03.007

[Abstract](1062) [PDF 618KB](136)

Abstract:
GNSS pseudorange point positioning speed and there is no ambiguity problem, its principle is simple and easy to realize, so in GNSS data processing, this method is often used. Based on GPS, GLONASS, BDS multimode as an example, introduces the existing multimode coordinate unification, unified time benchmark problem then introduces the pseudorange point positioning principle and calculation model, based on the Visual Studio2010 platform, written in GPS, GLONASS, BDS multimode pseudorange single point positioning procedures and absolute velocity determination. Combined with relevant examples,pseudorange point positioning accuracy and absolute velocity determination were analyzed.

Analysis of the Cooperation Framework between China and the U. S. in the Field of Satellite Navigation

WANG Lizhi, WANG Xiaoni

2017, 42(3): 38-41. doi: 10.13442/j.gnss.1008-9268.2017.03.008

[Abstract](346) [PDF 474KB](126)

Abstract:
The purpose of this article is to discuss the framework and content of cooperation between China and the U. S. in the field of satellite navigation so as to constitute the position and strategy which is usable for us. The relevant suggestions are for consulting.

Beamforming Technique in Anti-Jamming Compass Receiver by Exploitation of Cyclostationarity

LI Lijun, HUANG Jiyan, LIU Zheng

2017, 42(3): 42-47. doi: 10.13442/j.gnss.1008-9268.2017.03.009

[Abstract](506) [PDF 636KB](68)

Abstract:
Although many antijamming methods in space domain have been proposed for satellite systems in the literature, they require the prior knowledge of DOA and reference signals, or cannot output optimal SINR since those algorithms suppressed both the desired signal and interference, or cannot mitigate the manmade interference. To counter the problems above, a novel blind beamforming method based on cyclostationarity of satellite signal is proposed in this paper for antijamming Compass Receiver. First, the cyclostationarities of compass signal and manmade interference are analyzed in the paper. An objective function based on the analysis results is constructed for the proposed method. Finally, the Lagrange method is used to obtain the solution. Compared with the existing methods, the proposed algorithm need not the prior knowledge of DOA and reference signals, can obtain the optimal array gains, and can suppress both the white noise interference and manmade intergerence. Theoretical analysis and simulation results are provided to show the effectiveness of the proposed method.

Analysis of Influence of Reasonable Weight Ratio on Single Point Positioning of GPS／BDS Pseudorange

ZHANG Guanghan, YU Xuexiang, YAN Chao, LU Li, ZHANG Jikai

2017, 42(3): 48-53. doi: 10.13442/j.gnss.1008-9268.2017.03.010

[Abstract](402) [PDF 715KB](69)

Abstract:
GPS／BDS combination positioning is a combination of two systems observations for positioning solution, but the GPS system and the Beidou system there is a systematic difference. In order to ensure the reasonable allocation of data between the two systems, it is necessary to determine a reasonable weight ratio between the observed values of the two systems. The optimal weight ratio is obtained by using the pseudorange singlepoint localization of several different a priori weights ratio and the singleposition weight ratio of the two systems obtained by using the Helmert variance component estimation method. The results show that the ratio of GPS／BDS combination is 1∶1. However, when the number of satellites in one system decreases or the data quality is poor, the contribution rate of the system observations in the combined localization is greatly reduced. In this case, it is necessary to determine the reasonable ratio

Design and Realization of Low Cost UAV Oblique Photography

XU Shenyuan, ZHANG Yun, HONG Zhonghua, YANG Shuhu, HAN Yanling

2017, 42(3): 54-60. doi: 10.13442/j.gnss.1008-9268.2017.03.011

[Abstract](333) [PDF 883KB](87)

Abstract:
Micro low-cost unmanned aerial vehicle (UAV) has the advantages of less restrictions for landing and takeoff, convenient transportation and relatively low cost. It is widely used in smallscale and decentralized regional photogrammetry, but the design of lowcost UAV have to tradeoffs and compromise between positioning accuracy, voyage, payload and many other aspects. Therefore, it is necessary to improve the efficiency of the lowcost UAV photography, build a lowcost fixedwing unmanned aerial vehicle, using Beidou／GPS combination positioning to increase the number of highelevation satellites to avoid the reduce of the positioning accuracy caused by the attitude changes; Two synchronized sport camera as the photography payload; the entire system cost control in less than ten thousand. According to the test flight time and the remaining power of the battery, this UAV have an operating time of about 1 hour and 30 minutes, and operating range about 70 km.

BDS／GPS Data Real-time Acquisition and Research on Decoding Arithmetic Based on Development Board of STM32

LIU Yang, YU Xuexiang, XU Wei

2017, 42(3): 61-65. doi: 10.13442/j.gnss.1008-9268.2017.03.012

[Abstract](298) [PDF 565KB](51)

Abstract:
According to the fact that it occurred data loss, unreasonable storage, low accuracy of decoding when receiving the realtime BDS／GPS data. This paper presented a program of the realtime data acquisition and decoding, taking the development board based on STM32F103RET6 microcontroller as carrier. It achieved data storage and calculation, and got high precision pseudorange, carrier observations. Meanwhile, it calculated the pseudorange single point positioning by combined BDS／GPS.The results show that the standard deviation is about 9 meters and RMSE is about 14 meters, the development board is proved stable and easy to use. This is the basis of data realtime acquisition, decoding and differential computation of multi-GNSS.

Design and Precision Analysis of the GNSS Control Network of the BeiDou Satellite Launch Site

FU Chongwei, ZHAO Wuxiao, XING Wei

2017, 42(3): 66-69. doi: 10.13442/j.gnss.1008-9268.2017.03.013

[Abstract](267) [PDF 422KB](42)

Abstract:
GNSS control network of the launch site of BeiDou navigation satellites is used to provide high precision position reference, high direction reference and high orbit control reference, and is the key to ensure the satellite launch vehicle successfully launched and precisely orbited. design of the measurement and control network should be scientific and precise, and take outside practice feasibility. This article discussed on technical design and measurements implement of GNSS control network, estimated the GNSS accuracy of control network by measurement working, and verified the technology design’s feasibility of Beidou satellite launch site GNSS control network.

Establish of High-precision Quasi Geoid Model on Sea Area

LIU Li, ZHANG Yizhi, WEN Xu, LI Liang, CHU Liwei

2017, 42(3): 70-72. doi: 10.13442/j.gnss.1008-9268.2017.03.014

[Abstract](287) [PDF 375KB](56)

Abstract:
The establishment of regional quasi geoid with high resolution and high accuracy has become the essential condition for the construction of digital surveying and mapping system and the construction of Digital City. Especially in Topographic Map Survey and oceanographic survey, the demand of centimeter level geoid is very urgent. This paper Based on the new theoretical calculation method, the gravity field model and the fusion technology, The establishment of geoid model in centimeter class sea area is very meaningful for rapid elevation of coastal area information, and makes up for the gap of sea area.

Analysis on the Application of Mapping Satellite Image

SI Chuanbo, DU Weichao, ZHANG Guangyou

2017, 42(3): 73-76. doi: 10.13442/j.gnss.1008-9268.2017.03.015

[Abstract](326) [PDF 421KB](39)

Abstract:
Application of Mapping satellite system,which has the independent domestic means of acquiring realtime global geographic images,get rid of the passive situation of remote sensing and mapping data of longterm dependence on foreign commercial satellite, which has been gradually applied in production. According to the task production practice, this paper solves the problems of image target location using internet resources. select the production method to facilitate the word, greatly improve the progress of the entire task, improve the efficiency of the work.

Design and Research of Automatic Cruise Monitoring Ship Based on GPS

JIANG Shaojie, LIU Haidi, WANG Xian

2017, 42(3): 77-81. doi: 10.13442/j.gnss.10089268.2017.03.016

[Abstract](361) [PDF 667KB](63)

Abstract:
In view of the high cost and poor flexibility of the water quality parameters of marine ranching, a water quality monitoring ship with automatic cruise function based on GPS is developed. This ship uses Arduino microcontroller as the ship`s controlling module, combined with GPS positioning technology and wireless communication technology to achieve the ship`s automatic cruise function. The multipoint mobile measurement function of water quality parameters is realized by using a variety of sensor modules, Analyze and process the collected data to complete the transmission and release. The developed software is able to obtain the motion state of the ship in real time, view the track and position information of the ship, and send the control commands to the ship through the wireless network to achieve the effective control of the ship's hull. Monitoring ship greatly reduces the number of monitoring equipment at the same time improve the detection accuracy and detection efficiency, reduce the cost of monitoring, it played a positive role in promoting the precision of aquaculture.

Design and Implementation of Logistics Dynamic Traceability System Based on BeiDou Satellite Navigation System

CHEN Zheng, YU Lijuan, CHEN Chengming

2017, 42(3): 82-86. doi: 10.13442/j.gnss.1008-9268.2017.03.017

[Abstract](331) [PDF 526KB](56)

Abstract:
Aiming at the current development of logistics and transportation, a design method of logistics dynamic traceability system based on Beidou satellite navigation system is proposed. Combined with embedded technology, wireless communication technology and sensor technology, designed a logistics dynamic traceability system, so that a variety of information in the process of transport can be realtime monitoring. The system has many functions, such as obtaining location information, showing trajectory of tractor and path planning. The actual test shows that the system is running smoothly, with high precision and high stability.

Measurement of Handheld GPS Measurement Accuracy Based on Mathematical Statistics

HU Tao

2017, 42(3): 87-89. doi: 10.13442/j.gnss.1008-9268.2017.03.018

[Abstract](301) [PDF 386KB](46)

Abstract:
Handheld GPS is a GPS satellite positioning, navigation, data acquisition and mapping instruments, with its simple operation, easy to carry, with a certain degree of measurement accuracy, in the oil field wells survey, road inspection, well location navigation, distance Calculation, rough coordinate acquisition and other exploration and development work, has been a very wide range of applications. Based on the theory of mathematical statistics and measurement error, this paper analyzes, processes and calculates the coordinate data collected by handheld GPS, and obtains the positioning accuracy and actual positioning error of handheld GPS receiver, which is the applicable range of handheld GPS Provided a reference.

HNGICS Inversion Atmospheric Precipitation Applications

MU Baosheng, LIU Hongfei

2017, 42(3): 90-93. doi: 10.13442/j.gnss.1008-9268.2017.03.019

[Abstract](286) [PDF 487KB](97)

Abstract:
This paper first introduces the principle method of the GPS inversion atmospheric precipitation,And Highlighting introduced the process of the GPS inversion atmospheric precipitation. Then introduces the geological information of continuous acquisition operation system of henan province,Referred to as HNGICS.Finally introduced how to use HNGICS atmospheric precipitation inversion and its application prospect in the field of each.

The Application of BeiDou Satellite Navigation System in Precision Agriculture of Henan

ZHU Huairu, ZHANG Xinying

2017, 42(3): 94-98. doi: 10.13442/j.gnss.1008-9268.2017.03.020

[Abstract](388) [PDF 695KB](149)

Abstract:
Precision agriculture is the new trend in agricultural development in the world, It can not leave the location information in precision agriculture production, along with our country civil popularizing the BeiDou satellite navigation system, combined with the present situation of the BeiDou satellite navigation base station construction in our province, the BeiDou satellite navigation system in the direction of the application and development on precision agriculture in our province.

Construction and Practice of Embedded Teaching Experiment Platform for Satellite Navigation

ZHANG Wanwei, WANG Fuhong, GUO Fei, LIU Wanke

2017, 42(3): 99-102. doi: 10.13442/j.gnss.1008-9268.2017.03.021

[Abstract](389) [PDF 446KB](40)

Abstract:
Aiming at the problems which lack of training students ability such as cultivation comprehensive analysis of problem solving ability and innovation ability in the satellite navigation experimental teaching of Navigation Engineering, based on satellite navigation and embedded system integrated development, an embedded teaching experiment platform of satellite navigation combining hardware and software is designed and constructed, The hardware and software of the experimental platform and the construction of the experimental course are introduced in detail. The experimental platform has been put into practical teaching and achieved good teaching effect.