The Current Status of QZSS Program
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1 The Current Status of QZSS Program Satoshi Kogure Japan Aerospace Exploration Agency (JAXA) October 21, 2015 International Association of Institute of Navigation World Cogress Czech Republic 1
2 Acknowledgment Slides introducing the latest Status of QZSS were provided by QSS (QZS System Services Incorporation), a company which was established to deploy and operate QZSS under Private Finance Initiative (PFI) framework. Many thanks to their contributions here. Logo of QSS on the slide means that it was provided by QSS with minor modifications on it. 2
3 Topics 1. System Overview and Program Status 2. Mission of the QZSS (Planned Services) 3. Current JAXA s activities related to Satellite Navigation 4. Summary 3
4 1. System Overview Functional Capability: GPS Complementary GNSS Augmentation Messaging Service Coverage: Asia and Pacific region Signals(QZS-1): L1C/A, L1C, L2C and L5 L1S (L1-SAIF) on MHz L1Sb will be added as SBAS from 2020 s L6 (LEX) on MHz 1st QZSS satellite MICHIBIKI Four satellites constellation will be established and the service will start in
5 Quasi-Zenith Satellite System (QZSS) QZSS is positioning satellite system for complement and augment GPS. Contribution : GNSS capability, Asia-Pacific region Japan - U.S. cooperation Enhancement of disaster management and national security Plan(Original) : Prepare the 4 satellites constellation(3 IGSO + 1 Geostationary orbit) by the end of the 2010s. In the future, 7 satellites constellation shall be completed to enable continuous and more sustainable positioning. Current Status : System and application verification by using the first satellite, MICHIBIKI. Number of Satellites (as of the beginning of 2018JFY) IGSO: 3 satellites constellation, Geostationary Orbit: 1 satellite 5
6 Organization and Contractual Frameworks Government of Japan QZSS Project SBAS Project Office of National Space Policy, Cabinet Office QZS System Service Inc. (QSS) NEC Corp. (NEC) Contract (PFI) System and Service Provider Contract for Ground System Procurement ( ) Mitsubishi Electric Corp. (MELCO) Product(System) Developer(s) Contract for satellites( ) Ministry of Land, Infrastructure, Transport and Tourism Civil Aviation Bureau of Japan(JCAB) SBAS Signal will be provided from SBAS signal generated system owned by JCAB. This system will be operated by JCAB. SBAS Signal defined by ICAO The contract for QZSS Satellites procurement has been concluded between Cabinet Office and MELCO. 6
7 System Configuration of QZSS Quasi-Zenith Satellite System (Total System) Project under ministerial jurisdiction Satellite System QZS System 3 satellites include MICHIBIKI Geostationary Orbit Satellite 1 satellite Satellite bus Payload Satellite bus Payload Ground System Not only MICHIBIKI, 3 other satellites are also able to substitute anytime. Ground System always maintains these 4 satellites (3 QZSS orbit, and 1 geostationary orbit) as 1 component. PFI project Master Ground Station Telemetry command center Monitor station Public signal delivery center Short message center Messaging Service Center Technology verification of positioning facility SBAS project SBAS Signal Generator facility 7
8 Group of GPS Conceptual Scheme of QZSS Operation Positioning Satellites (QZSS and GEO ) Outer Space Segment Complementati on signal Positionin g signal User segment Safety / Disaster information Reinforcemen t signal/ Short message Monitor station Safety / Disaster informatio n あ Tracking/Telemet ry Command center (Domestic) Ground Segment Telemetry command Navigation message Short message Positioning signal observation data/ Ranging data Master Ground Station (Domestic) Emergenc y informatio n Safety / Disaster informatio n External system Total QZSS Operation 8
9 Orbit(s) of QZSS 4-Satellite Constellation; 1 st QZS(launched in 2010) plus 3 additional satellites (2 QZ Orbit, 1 Geostationary Orbit) Japan Region Over 20 degrees elevation More than 2-QZS are available Over 60 degrees elevation 1 QZS is available 1 Geostationary satellite Equator (C)JAXA 9
10 Q-Z Orbit Parameter and Tracking Range Orbit Parameter Nominal Allocation Tracking Range Semimajor Axis(A) 42164km - Eccentricity(e) ±0.015 Inclination (i) 40 degree 36 ~ 45 degree Argument of Perigee(w) 270 degree 270±2.5 degree RAAN(Ω) Orbit(s) of QZSS Block I_Q: 117 degree Block II_Q: 117±130 degree Central Longitude (λ) 136 degree 130~140 degree RAAN: Right Ascension of the Ascending Node Geosynchronous Orbit Parameter and Tracking Range Orbit Parameter Nominal Allocation Tracking Range Longitude E ±0.1 degree Latitude 0 0±0.1 degree - 10
11 QZSS Visibility Time TOKYO SINGAPORE BANGKOK SYDNEY Ref. : IS-QZSS v1.5, JAXA, 27 Mar
12 Positioning Signal of QZSS (as of Sept. 2015) Positioning Signal of QZSS Not only positioning complementation signal, but satellite orbit, time, and ionosphere correction information will be also transmitted as augment information. L1C/A 1 st Satellite 2 nd -4 th Satellite QZO QZO GEO Positioning complement GPS L1C Positioning complement GPS MHz Augmentation L1S (SLAS) Message Service L2C Positioning complement GPS MHz L5 L5S L MHz MHz Positioning complement GPS Augmentation Experimental - Use Augmentation (CLAS) L1Sb Augmentation SBAS - - SBAS Service will be available from the beginning of 2020 s. 12
13 QZSS Program Status Basic policy on the implementation of the operational QZSS project (Cabinet Decision on September 30, 2011) The Government of Japan has decided to accelerate the deployment of the operational QZSS as expeditiously as possible. Four satellites constellation shall be established by the 2018JFY. This year (Jan. 2015), the Japanese government has decided to up-grade the QZSS to 7 satellites constellation in 2023(around)JFY. Verification of QZS-1 MICHIBIKI Technical Verification by JAXA. Application Verification by private companies. 13
14 QZSS Program Schedule (Up-date) JFY H27 (2015 ) H28 (2016) H29 (2017 ) H30 (2018) H31 (2019) H32 (2020) H33 (2021) H34 (2022) H35~ (2023~) 1st Michibiki Replacement sat. of Michibiki In-Operation Launch (Prospect) QZSS 4-Sat. Constellation Launch No.2,3,4 (Estimate) In- Service SBAS Service QZSS 7-Sat. Constellation Development / Design (Additional 3 Sat.) In- Service Note: JFY (Japanese Fiscal Year)begins April and ends March in next calendar year. 14
15 2. Mission of the QZSS (Planned Services) 15
16 2. Mission of QZSS QZSS provides positioning- related service and messaging service. Positioning- related service 1 Satellite Positioning Service The service to provide the same as GPS satellites in spite of urban area or mountain area. 2 Sub-meter Level Augmentation Service The service to provide accurate positioning around 2-3 meters. ( ) 3 Centimeter Level Augmentation Service The service to provide highly accurate positioning around 10 centimeters.( ) Ionosphere disturbance(fluctuations), multipath and others will affect the accuracy. 4 Positioning Technology Verification Services The service to provide an application demonstration for new positioning technology. Messaging Service 5 Short message delivery service The service to provide users in the field with disaster management and rescue. 2, 3, 5 :These services are under investigation for overseas users. 16
17 QZSS Service: Positioning related Service 1Satellite Positioning Service Coverage Range More than 10 degrees elevation to QZS constellation High compatibility with the GPS satellite Contributing to the reduction of positioning error 17
18 1Satellite Positioning Service Ionosphere Parameter for L1C/A (Two types of parameters) Type1: Narrow (Japan and around Japan) Type2: Wide (Asia-Oceania Region) The average ionosphere URE of the two type of parameters shall satisfy; < 7.0m (95%) Japan and areas around Japan By utilizing the Type1 parameter, more accurate URE can be obtained. 18
19 2Sub-meter Level Augmentation Service Sub-meter Level Augmentation Signal Transmit L1S signal which has the same frequency modulation with L1C/A, in order to augment positioning. Accuracy of positioning : a few meters (Ionosphere disturbance(fluctuations), multipath and others will affect the accuracy.) Private consumers are suitable user since dual frequencies receivers are overpriced and have short battery life For Private Navigation For Public Transportation Navigation For Disaster/Crisis Management Sightseeing, shopping information Emergency point report (#110/#119) Management of airplane, ship/vessel, bus/taxi operation Searching activity, local security 19
20 2Sub-meter Level Augmentation Service SLAS Service DGPS correction data will be provided in L1S signal MSG Type 50(in L1S) : DGPS correction data Service Range Japan and around Japan area (at the start of the service, 2018) 20
21 2Sub-meter Level Augmentation Service Positioning accuracy and it s range Accuracy (95%) [m] H V Range Range The DGPS corrections, more accurate positioning can be realized 21
22 3Centimeter Level Augmentation Service Centimeter Level Augmentation Signal Peculiar signal (frequency) which GPS satellite dose not support. This signal, L6, will be transmitted for positioning augmentation. GEO-NET(Reference stations)is necessary. Accuracy of positioning : Around ten-centimeter level (Reference stations are necessary) Target user are professionals who require high precision positioning For Driving Navigation For Land Survey Computer aided construction by automatic construction machine (IT Construction) Automatic agriculture machine (IT-Agriculture) Precise Land Survey 22
23 3Centimeter Level Augmentation Service < Centimeter Level Augmentation Service > Coverage Area Within 20km radius from GNSS-based station(reference point) which are placed all over Japan Up to 2000m of altitude direction is available (Service for Asia-Pacific region is under consideration) 23
24 QZSS Service: MSG related Service 4Satellite Report for Disaster and Crisis Management By using reserve space of L1S signal, Short message (Disaster/Risk management report) can be transmitted. Message Sample Disaster : Earthquake Location : Miyagi Magnitude : M7 at Ishinomaki Warning : Tsunami Able to use L1S receiver. (GPS/Michibiki receiver) Short message : Earthquake, Tsunami, Volcano Factory explosion, Forest fire Terrorist attack, Large-scale accident Safety / Disaster information Center Most promising Message transmitter is Japanese Government. 24
25 3. Current JAXA s Activities related to satellite navigation 25
26 5 m Past Achievement Since June, 2011, QZSS have provided navigation signals with good qualities, satisfying with their performance specifications, continuously. SIS-URE for the first satellite is 40cm (rms) level which is comparable with those for GPS Block IIRm and IIF satellite. During one month in August 2015, 34.7cm(rms) Specification on SIS-URE; less than 2.6m(95%) 26
27 What we are doing now... Getting more precise orbit and clock offset estimation, a POD software for multiple constellation, MADOCA is being developed. PPP and PPP-AR technology for user client software is also developed for precise positioning in everywhere Surveying future key technology for the next generation of QZSS 27
28 MADOCA Multi-GNSS Advanced Demonstration tool for Orbit and Clock Analysis A software to provide precise orbit/clock for multiple GNSS constellation Key-technology for future precise positioning with utilizing over 100 satellites GPS, GLONASS, QZSS and Galileo already supported, BeiDou planned Post Processing & Real Time function Ground infrastructure for the system of real time PPP service
29 R&D Activities for MADOCA June March 2013 (1st phase) Design and implementation of S/W from scratch Verification by post-processing and simulation April Broadcasting MT12 via QZS-1 "Michibiki" LEX channel Replacing MT10 and 11 for improving PPP user positioning accuracy Support GPS, QZSS and GLONASS (Nov ) Feb March 2016 (2nd phase) Continuous improvement of accuracy, stability and reliability on orbits and clocks RT distribution via internet was started on September, Support BeiDou* New features added*: FCB and local-iono/trop products Multiple-sensor integration to PPP for severe environment* * Implementing items in
30 Network extension: MGM-Net MGM-Net has been deployed globally under collaboration with many organizations. As of end of March, sites are operating including sites owned by data sharing organizations. 13 sites are expected to be available in 2015.
31 2m 2m Performance of Real-time MADOCA MADOCA Real-time orbit estimation result with regard to IGS Rapid and IGV (During 2015/05/11-17 (7 days)) A C R GPS orbit vs. IGR Real-time data stream from 80 sites were used. Along Cross Radial GPS GLO A C R Glonass orbit vs. IGV
32 MADOCA Internet Broadcasting To get Account for receiving MADOCA SSR message stream via internet, visit following URL Since September,
33 Summary QZSS, a regional space based PNT system, provides a couple of services to enhance GPS performance and availability. It is the four-satellite constellation. The operational services will start in 2018, three additional satellite will be launched in Now Japan is seeking seven-satellite constellation to be completed around Current JAXA s effort to develop MADOCA and its application with PPP/PPP-AR is introduced. The MADOCA product is being provided via QZS-1 LEX as well as inter net. It is expected to extend the currently planned QZSS service to for multiple constellation and global coverage in future. 33
34 Kyoto 2015/11/ Papers, QZS Bus Tour Demo, Indoor Positioning Demo Guest Speaker: Dr. Bradford Parkinson Venue Miyakomesse, Kyoto, Japan Maiko Dance Banquet 34
35 @ Brunei Darussalam Disaster Mitigation 7 th to 10 th December, 2015 Network with industry and academia from Asia Oceania Regional and beyond Discuss and showcase the latest results of Multi-GNSS Applications Demos. Precise Positioning ITS LBS Visit MGA website: (TBC)
36 Thank you for your kind attention. For more information, please visit QZSS web site For the info related to QZS-1, 36
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