Assessment of Beidou-3 and Multi-GNSS Precise Point Positioning Performance
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
China Science and Technology Newsletter No. 14
CHINA SCIENCE AND TECHNOLOGY NEWSLETTER Department of International Cooperation No.14 Ministry of Science and Technology(MOST), P.R.China July 25 2014 Special Issue: China’s Space Development Achievements and Prospects of China’s Space Development The 64th IAC Held in Beijing Shenzhou 10 Misson Successfully Accomplished Chang’e 3 Achieved Soft Landing on the Moon GF-1 Satellite - The First Satellite of CHEOS Achievements and Prospects of China’s Space Development Mr. Xu Dazhe, Chairman of China Aerospace Science in 1970 marked the start of China entering into space and and Technology Corporation (CASC) delivered a speech exploring the universe. Due to substantial governmental at the 64th International Astronautical Congress (IAC) on support and promotion, China’s space industry developed September 23, 2013, sharing experiences gained in the quite fast and has made world-known achievements. development of China’s space industry with international As the leader in China’s space sector, CASC is colleagues. assigned to develop, manufacture and test launch OUTSTANDING ACHIEVEMENTS MADE BY vehicles, manned spaceships, various satellites and CHINA’S SPACE INDUSTRY other spacecraft for major national space programs such as China’s Manned Space Program, China’s Lunar China’s space programs have had 57 years of Exploration Program, BeiDou Navigation Satellite development since the 1950s. The successful launch of System, and China’s High-Resolution Earth Observation China’s first artificial satellite Dongfanghong 1 (DFH-1) Monthly-Editorial Board:Building A8 West, Liulinguan Nanli, Haidian District, Beijing 100036, China Contact: Prof.Zhang Ning E-mail: [email protected] [email protected] http://www.caistc.com System. -
Robotic Forest Harvesting Process Using GNSS
RNI: DELENG/2005/15153 No: DL(E)-01/5079/17-19 Publication: 15th of every month Licensed to post without pre-payment U(E) 28/2017-19 Posting: 19th/20th of every month at NDPSO Rs.150 ISSN 0973-2136 Volume XV, Issue 5, May 2019 THE MONTHLY MAGAZINE ON POSITIONING, NAVIGATION AND BEYOND Robotic forest harvesting process using GNSS Soil moisture retrieval using NavIC-GPS-SBAS receiver Rethinking asset management. At 172 megapixels per full-spherical image, the UltraCam Panther Reality Capture System lets you capture your production plant in more detail, with superior sharpness and in higher fidelity than ever before. ULTRACAM PANTHER KEY FEATURES Indoor and outdoor Multitude of use Easy to deploy, mapping even cases through operate and without GPS modular design maintain Discover more on www.vexcel-imaging.com i50 GNSS RTK Brings speed and accuracy in Rethinking one easy-to-use GNSS solution asset management. At 172 megapixels per full-spherical image, the UltraCam Panther Reality Capture System lets you capture your production plant in more detail, with superior sharpness and in higher fidelity than ever before. ULTRACAM PANTHER KEY FEATURES Full GNSS technology Extended connectivity GPS+Glonass+Beidou+Galileo Internal UHF and 4G modems for robust data quality for optimized field operations Indoor and outdoor Multitude of use Easy to deploy, mapping even cases through operate and Preset work modes Rugged and compact without GPS modular design maintain Select configurations in a few Industrial design to withstand seconds for higher productivity -
Enhanced Orbit Determination for Beidou Satellites with Fengyun-3C Onboard GNSS Data
GPS Solut DOI 10.1007/s10291-017-0604-y ORIGINAL ARTICLE Enhanced orbit determination for BeiDou satellites with FengYun-3C onboard GNSS data 1,2 1 1 3 3 Qile Zhao • Chen Wang • Jing Guo • Guanglin Yang • Mi Liao • 1 1,2 Hongyang Ma • Jingnan Liu Received: 3 September 2016 / Accepted: 27 January 2017 Ó The Author(s) 2017. This article is published with open access at Springerlink.com Abstract A key limitation for precise orbit determination (Root Mean Square) of overlapping orbit differences of BeiDou satellites, particularly for satellites in geosta- (OODs) is 2.3 cm for GPS-only solution. The 3D RMS of tionary orbit (GEO), is the relative weak geometry of orbit differences between BeiDou-only and GPS-only ground stations. Fortunately, data from a low earth orbiting solutions is 15.8 cm. Also, precise orbits and clocks for satellite with an onboard GNSS receiver can improve the BeiDou satellites were determined based on 97 global geometry of GNSS orbit determination compared to using (termed GN) or 15 regional (termed RN) ground stations. only ground data. The Chinese FengYun-3C (FY3C) Furthermore, also using FY3C onboard BeiDou data, two satellite carries the GNSS Occultation Sounder equipment additional sets of BeiDou orbit and clock products are with both dual-frequency GPS (L1 and L2) and BeiDou determined with the data from global (termed GW) or (B1 and B2) tracking capacity. The satellite-induced vari- regional (termed RW) stations. In general, the OODs ations in pseudoranges have been estimated from multipath decrease for BeiDou satellites, particularly for GEO observables using an elevation-dependent piece-wise linear satellites, when the FY3C onboard BeiDou data are added. -
Gnss and Avionics Simulation for Rohde & Schwarz Signal Generators
GNSS AND AVIONICS SIMULATION FOR ROHDE & SCHWARZ SIGNAL GENERATORS Specifications R&S®SMBV100B Vector Signal Generator R&S®SMW200A Vector Signal Generator Data Sheet Version 11.00 Version 11.00, February 2021 CONTENTS Definitions ....................................................................................................................................................................... 4 Overview .......................................................................................................................................................................... 5 Abbreviations ..................................................................................................................................................................................... 6 GNSS testing with the R&S®SMW200A ............................................................................................................................................. 6 Minimum instrument configuration for GNSS testing .......................................................................................................................... 7 Minimum instrument configuration for avionics testing ....................................................................................................................... 7 Global navigation satellite systems (GNSS) ................................................................................................................. 8 Addressed GNSS applications .......................................................................................................................................................... -
Antennas for High-Precision GNSS Applications
Antennas for High-Precision GNSS Applications Roshni Prasad Associate Engineer – RF & Connectivity Abracon, LLC Antennas for High-Precision GNSS Applications | Abracon LLC Abstract: The increasing interest in high-precision GNSS/GPS services has led to the development of novel antenna solutions to service various end-customer applications in markets such as agriculture, recreation, surveying & mapping, and timing. Multi-band receivers and antennas are required to derive a higher-precision rate on positioning. However, using dedicated antennas for widely separated multi- band support may introduce several challenges in the design, including increased occupancy in board space and coupling. This application note reviews how these challenges are addressed by employing a single multi-band antenna. The discussion primarily focuses on Abracon’s internal and external antenna solutions that can cover multiple GPS and/or GNSS bands as a single entity for precision positioning applications. Index Introduction to GNSS Antennas for Multi-band GNSS Receivers Types of Antennas for Multi-Band GNSS Receivers Integrating Antennas in GNSS Applications Key Factors in Determining Antenna Performance Advantages of Using Multi-band GNSS Conclusion References Page | 2 5101 Hidden Creek Ln Spicewood TX 78669 | 512.371.6159 | www.abracon.com Antennas for High-Precision GNSS Applications | Abracon LLC 1. Introduction to GNSS What is GNSS? Why is GNSS needed? What are the available constellations? Global Navigation Satellite System (GNSS) is a satellite-based navigation and positioning system that offers a prediction of coordinates in space, with respect to velocity and time, to assist in the navigation and positioning of receiver systems. The service is supported by various global constellations, including GPS (U.S.), GLONASS (Russia), Galileo (Europe), and regional constellations such as BeiDou (China), QZSS (Japan) and IRNSS (India). -
Leica Viva Series White Paper Beidou Integration
New Systems, New Signals Providing BeiDou Integration Technical literature December 2013 P. Fairhurst, X. Luo, J. Aponte, B. Richter, Leica Geosystems AG Switzerland Heerbrugg, Schweiz 2 | Technical literature New Systems, New Signals, New Positions – Providing BeiDou Integration Abstract In December 2012, the China Satellite Navigation Leica Geosystems is a world leader in GNSS Office (CSNO) released the official Signal-in-Space positioning and in utilizing innovative methods Interface Control Document (ICD; ICD-BeiDou, for providing high precision GNSS solutions. With 2012) and announced the system operability over new GNSS such as BeiDou and other signals and the Asia-Pacific region. regional systems providing a significant increase in satellite availability, new methods are required to The ICD release prompted Leica Geosystems to fully realize the potential benefits of these additi- release software to fully support the BeiDou cons- onal GNSS constellations. tellation in the Leica Viva GNSS technologies: However, before the potential of these new sys- n Leica SmartTrack tems can be fully realized, we must first under- n Leica SmartCheck stand what advantages they can provide when n Leica xRTK being used in a high precision GNSS solution. Leica Geosystems’ previous leading-edge work on These technologies form the basis of Leica Geo- GLONASS observation interoperability showed that systems GNSS RTK performance. Leica SmartTrack there are many challenges involved with incorpora- technology guarantees the most accurate signal ting new GNSS constellation into a position soluti- tracking. It is future proof and ensures compa- on, and careful evaluation needs to be carried out tibility with all GNSS systems today and tomor- to understand the behaviour and characteristics of row. -
The Fengyun-3C Radio Occultation Sounder GNOS: a Review of the Mission and Its Early Results and Science Applications
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-385 Manuscript under review for journal Atmos. Meas. Tech. Discussion started: 15 January 2018 c Author(s) 2018. CC BY 4.0 License. The FengYun-3C radio occultation sounder GNOS: a review of the mission and its early results and science applications Yueqiang Sun1,2,3, Weihua Bai1,2,3, Congliang Liu1,2, Yan Liu4, Qifei Du1,2,3, Xianyi Wang1,2, Guanglin Yang5, Mi Liao5, Zhongdong Yang5, Xiaoxin Zhang5, 1,2 1,2 1,2 1,2 5 Xiangguang Meng , Danyang Zhao , Junming Xia , Yuerong Cai , and Gottfried Kirchengast6,2,1 [1] National Space Science Center, Chinese Academy of Sciences (NSSC, CAS) and Beijing Key Laboratory of Space Environment Exploration, Beijing, China [2] Joint Laboratory on Occultations for Atmosphere and Climate (JLOAC) of NSSC, CAS, 10 Beijing, China, and University of Graz, Graz, Austria [3] School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China [4] National Meteorological Center, Chinese Meteorological Administration, Beijing, China [5] National Satellite Meteorological Center, Chinese Meteorological Administration, Beijing, 15 China [6] Wegener Center for Climate and Global Change (WEGC) and Institute for Geophysics, Astrophysics, and Meteorology/Institute of Physics, University of Graz, Graz, Austria Correspondence to: Congliang Liu (Email:[email protected]); Wehuai Bai (Email: [email protected]) 20 1 Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-385 Manuscript under review for journal Atmos. Meas. Tech. Discussion started: 15 January 2018 c Author(s) 2018. CC BY 4.0 License. Abstract The Global Navigation Satellite System (GNSS) occultation sounder (GNOS) is one of the new generation payloads onboard the Chinese FengYun 3 (FY-3) series of operational meteorological satellites for sounding the Earth’s neutral atmosphere and ionosphere. -
ABAS), Satellite-Based Augmentation System (SBAS), Or Ground-Based Augmentation System (GBAS
Current Status and Future Navigation Requirements for Mexico City New Airport New Mexico City Airport in figures: • 120 million passengers per year; • 1.2 million tons of shipping cargo per year; • 4,430 Ha. (6 times bigger tan the current airport); • 6 runways operating simultaneously; • 1st airport outside Europe with a neutral carbon footprint; • Largest airport in Latin America; • 11.3 billion USD investment (aprox.); • Operational in 2020 (expected). “State-of-the-art navigation systems are as important –or more- than having world class civil engineering and a stunning arquitecture” Air Navigation Systems: A. In-land deployed systems - Are the most common, based on ground stations emitting radiofrequency signals received by on-board equipments to calculate flight position. B. Satellite navigation systems – First stablished by U.S. in 1959 called TRANSIT (by the time Russia developed TSIKADA); in 1967 was open to civil navigation; 1973 GPS was developed by U.S., then GLONASS, then GALILEO. C. Inertial navigation systems – Autonomous navigation systems based on inertial forces, providing constant information on the position of the flight and parameters of speed and direction (e.g. when flying above the ocean and there are no ground segments to provide support). Requirements for performance of Navigation Systems: According to the International Civil Aviation Organization (ICAO) there are four main requirements: • The accuracy means the level of concordance between the estimated position of an aircraft and its real position. • The availability is the portion of time during which the system complies with the performance requirements under certain conditions. • The integrity is the function of a system that warns the users in an opportune way when the system should not be used. -
Application of Fengyun 3-C GNSS Occulation Sounder for Assessing Global Ionospheric Response to Magnetic Storm Event” by Weihua Bai Et Al
Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2016-291-AC1, 2017 AMTD © Author(s) 2017. CC-BY 3.0 License. Interactive comment Interactive comment on “Application of Fengyun 3-C GNSS occulation sounder for assessing global ionospheric response to magnetic storm event” by Weihua Bai et al. Weihua Bai et al. [email protected] Received and published: 3 January 2017 Dear Editor and Referee #1, Thank you for your comments concerning our manuscript entitled “Application of Fengyun 3-C GNSS occulation sounder for assessing global ionospheric response to magnetic storm event” (Manuscript Number: doi:10.5194/amt-2016-291-RC1). Those comments are all valuable and very helpful for revising and improving our paper, as well Printer-friendly version as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. The responds Discussion paper to the comments are as flowing: C1 Referee #1: AMTD General comments: 1, Figure 4 compares NmF2 measurements from the GNOS GPS occultation and Fig- ure 5 shows those produced by GNOS BDS occultation. The comparison between Interactive these two figures is the only thing I find in this paper that could be called a “new find- comment ing.” Response: We would like to explain our purposes and meanings in this paper: (1) It’s a first demonstration for the application of the FY3-C GNSS occulation sounder (GNOS) for assessing global ionospheric response to magnetic storm events. These results coincide with previous studies (e. g. Habarulema et al. 2014, 2016and refer- ences therein), which just right proves the reliability of FY3-C GNOS radio occultation measurements for analyzing statistical and event-specific physical characteristics of the ionosphere. -
GNSS Applications for Agricultural Practices by Guy Blanchard Ikokou, University of Cape Town
Application technical GNSS applications for agricultural practices by Guy Blanchard Ikokou, University of Cape Town Global positioning systems are relatively new technologies when it comes to applications in agriculture. Applications in tractor guidance, variable rate supply of chemical inputs and field monitoring of crop yield were recently tested using GPS. This article studies the basic concepts of GPS as they apply to agricultural production and provides a detailed analysis of the recent developments in this area with a focus on functionality and efficiency. ver the past 30 years satellites are maintained within 24 information worldwide and provides agricultural machinery has circular orbital planes inclined 55° with support to military, civil and commercial Oreached high technical respect to the equator plane [1]. The applications. standards in order to improve system currently provides two user A total of 24 GLONASS satellites are agriculture production. Precision services: (i) the Standard Positioning actually operational with the latest agriculture or satellite agriculture is a Service (SPS), open to civil users is satellite placed into space on 26 April highly effective farming management available for civil applications such as 2013 with an inclination of 64,8° method that focuses on intra-field agricultural practice and farming, and and an altitude of 19 100 km [3]. variation in order to optimise (ii) the Precision Positioning Service, The system broadcasts two types of agriculture returns while conserving restricted to authorised users such navigation signals: (i) the standard environmental resources. It relies on as the United States military and accuracy signal mainly available to civil new technologies such as the Global their allies. -
High-Precision GNSS: Methods, Open Problems and Geoscience Applications”
remote sensing Editorial Editorial for the Special Issue: “High-Precision GNSS: Methods, Open Problems and Geoscience Applications” Xingxing Li 1,*, Jacek Paziewski 2 and Mattia Crespi 3 1 School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China 2 The Faculty of Geodesy, Geospatial and Civil Engineering Institute of Geodesy, University of Warmia and Mazury in Olsztyn (UWM), 10-719 Olsztyn, Poland; [email protected] 3 Geodesy and Geomatics Division—DICEA, Sapienza University of Rome, 00184 Rome, Italy; [email protected] * Correspondence: [email protected] Received: 17 April 2020; Accepted: 18 April 2020; Published: 18 May 2020 Keywords: GNSS; GPS; GLONASS; Galileo; BDS; precise point positioning; relative positioning; orbit determination; ionosphere sounding; troposphere sounding; geoscience applications; high-rate positioning; GNSS for geodynamics In the past two decades, the high-precision Global Positioning System (GPS) has significantly increased the range of geoscience applications and their precision. Currently, it is one of two fully operational Global Navigation Satellite Systems (GNSS), and two more are in the implementation stage. The new European Galileo and Chinese BeiDou Navigation Satellite System (BDS) already provide usable signals, and both GPS and GLONASS are currently undergoing significant modernization, which adds more capacity, more signals, better accuracy, and interoperability, etc. Meanwhile, there has been significant technological development in GNSS equipment (in some cases, even at low-cost), which is now able to collect measurements at much higher rates (up to 100 Hz), thus presenting new possibilities. On the one hand, the new developments in GNSS offer a broad range of new applications for solid and fluid Earth investigations, in both post-processing and real-time; on the other, this results in new problems and challenges in data processing that increase the need for GNSS research. -
Applications of the Beidou Navigation Satellite System (December 2018)
© China Satellite Navigation Office 2018 Applications of the BeiDou Navigation Satellite System (December 2018) China Satellite Navigation Office © China Satellite Navigation Office 2018 © China Satellite Navigation Office 2018 Preface The BeiDou Navigation Satellite System (hereinafter referred to as the BDS) has been independently constructed and operated by China with an eye to the needs of the country’s national security and economic and social development. As a space infrastructure of national significance, the BDS provides all-time, all-weather and high-accuracy positioning, navigation and timing services to global users. In the late 20th century, China started to explore a path to develop a navigation satellite system suitable for its national conditions, and gradually formulated a three-step strategy of development: to complete the construction of the BDS-1 and provide services to the whole country by the end of 2000; to complete the BDS-2 construction and provide services to the Asia-Pacific region by the end of 2012; and to complete the BDS-3 construction and reach world-class standards around 2020. China has started its third step of construction, putting in place the basic system of BDS-3 at the end of 2018 and providing navigation services the world over. “BDS is developed by China, and dedicated to the world”. To benefit the world with reliable services from China, the BDS follows the basic principles of “independence, openness, compatibility and gradualness”. The BDS is one of the four key GNSS suppliers recognized by the United Nations International Committee on Global Navigation Satellite Systems (ICG), and a major achievement of China in the past four decades since the country’s reform and opening up.