RTK-PPP: Social Requirement and National Solution

Kori Asari, Masayuki Saito, Jun-ichi Takiguchi

Abstract:	This presentation reveals a total picture of RTK-PPP as the national solution based upon today's social requirement. RTK-PPP is highly accurate point positioning with the Real-Time Kinematic (RTK) quality, that means not only centimeter-level accuracy, but also the first fix within one minute. It is able to accede to all of practical heritages on both methods of RTK and Network RTK, in a nationwide region like Japan received the L6-signal of the Quasi-Zenith Satellite System (QZSS). In other words, RTK-PPP responds the needs of the RTK positioning anywhere and anytime in the whole of the nation. It is very effectual for the new types of the civilian requirement like autonomous cars, civilian-use copters, robotic tractors, and other precise applications. RTK-PPP is based on State Space Representation (SSR) defined by RTCM STANDARD 10403.2 section 3.5.12. Hence the RTK-PPP augmentation system broadcasts all types of corrections corresponding satellite orbit errors, clock errors, signal biases, ionospheric errors and tropospheric errors. On Janurary 9, 2015, Japan announced the 7-satellite realization plan of her QZSS. And as on-going process, she is building up the 4-satellite constellation system, including her centimeter-class augmentation service using the RTK-PPP method toward the 2018 service start. In such environment, this paper presents the total picture of the RTK-PPP method. This picture reveals its social requirement, system configuration, augmentation algorithm, the adjustment to the national datum and application expansion. The RTK-PPP solution utilizes Japanese QZSS as the augmentation system to GPS/GNSS and it may cover the Asia-Pacific countries with nationwide RTK-PPP services. RTK-PPP has been grown by the social requirement after launching QZS-1 in 2010. The QZSS Civilian Application Demonstration has been conducted and 337 companies join it until January 2015. The QZSS Business Innovation Council (Q-BIC) has been established by over 200 companies and organizations in July 2013, and they discuss on the QZSS missions month by month. Especially they expect the QZSS-unique Augmentation Services. The augmentation services using the L6-signal for each nation have three roles: (1) Adjustment to the national datum based upon the National CORS (Continuously Operating Reference Station) network (2) A higher positioning accuracy which the applications in the nation need (3) Higher integrity which the applications in the nation need In these roles, adjustment to the national datum would be very important for the Asia-Pacific nations, because they have so many earthquake disasters. Sovereign nations need country-specific augmentation in practice, because each country has its own needs, missions, its own coordinates, laws and regulations on PNT. Today the QZSS covers the Asia-Pacific region and the CORS networks are rapidly expanding in this region. The RTK-PPP method realizes a nationwide PNT service with the RTK-class quality. We propose the RTK-PPP method as National Solutions in the Asia-Pacific countries to utilize 7-satellite constellation of the QZSS. References: [1] K. Asari, M. Suzuki, N. Kubo, M. Saito, M. Shima, “SSR PPP for Asia-Pacific Services”, Tampa, Florida U.S.A., ION GNSS+ 2014, September 2014. [2] M. Saito, K. Asari, “Centimeter-class Augmentation System (CMAS)”, Nashville, Tennessee U.S.A., ION GNSS+ 2012, September 2012. [3] JAXA, “Quasi-Zenith Satellite System Navigation Service, Interface Specification for QZSS (IS-QZSS) V1.6”, IS-QZSS version1.6, November 2014.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	1159 - 1173
Cite this article:	Asari, Kori, Saito, Masayuki, Takiguchi, Jun-ichi, "RTK-PPP: Social Requirement and National Solution," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 1159-1173.
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