MADOCA: Japanese precise orbit and clock determination tool for GNSS

Kawate, Kaori; Igarashi, Takeo; Yamada, Hideki; Akiyama, Kensuke; Okeya, Masato; Takiguchi, Hiroshi; Murata, Masaya; Sasaki, Takashi; Matsushita, Saya; Miyoshi, Shoh; Miyoshi, Motoyuki; Kogure, Satoshi

doi:10.1016/j.asr.2023.01.060

Cited by 16 publications

(2 citation statements)

References 50 publications

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“…It provides a decimeter-level kinematic positioning for users located in the Asia-Pacific area [19]. In 2024 the Quasi-Zenith Satellite System (QZSS) will start transmitting MADOCA-PPP service [20], supporting all GNSS, but also limiting to Asia-Pacific area (https://qzss.go.jp). Since February 2023, Galileo High Accuracy Service (HAS) has offered almost global coverage (excluding some Asia-Pacific regions) for GPS and Galileo [21].…”

Section: Introductionmentioning

confidence: 99%

Galileo High Accuracy Service in Real-Time PNT, Geoscience and Monitoring Applications

Hadas,

Kazmierski,

Kudłacik

et al. 2024

IEEE Geosci. Remote Sensing Lett.

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Satellite transmission of orbit and clock corrections is critical for real-time positioning, navigation and timing (PNT), geoscience applications, safety and liability critical services based on Global Navigation Satellite Systems (GNSS) precise positioning. In response to such a demand, Galileo has established a High Accuracy Service (HAS) of almost global coverage for GPS and Galileo. We validate the quality of HAS corrections and investigate service performance in a variety of applications. Decimeter-level accuracy of HAS corrections leads to static and kinematic positioning with precision of a few centimeters and subdecimeter, respectively, and timing precision of a single nanosecond. Other GNSS-derived products meet the requirements of real-time GNSS meteorology and allow for monitoring coseismic vibrations. Although other Internet correction streams offer superior results, HAS provides better performance than nominal and nearly global coverage.

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Section: Introductionmentioning

confidence: 99%

Galileo High Accuracy Service in Real-Time PNT, Geoscience and Monitoring Applications

Hadas,

Kazmierski,

Kudłacik

et al. 2024

IEEE Geosci. Remote Sensing Lett.

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“…These services are fee-based and require separate agreements. On the other hand, GNSS correction information distribution services that can be used free of charge include MADOCA-PPP 5 , which provides correction information via quasi-zenith satellite system (QZSS), and centimeter-level augmentation service (CLAS) 6 , which provides correction information for PPP-RTK launched in 2021 by the Japanese QZSS. In addition, European Galileo launched a high-precision positioning service (HAS) 7 in 2022.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of L6 augmentation signal reception characteristics and positioning accuracy of compact and lightweight GNSS antennas

Suzuki

2023

Sci Rep

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Applications requiring outdoor position estimation, such as unmanned construction and delivery automation, focus on receiving global navigation satellite system (GNSS) correction information from satellites for high-precision positioning. In particular, the delivery of correction information for the Galileo high-accuracy service (HAS) and quasi-zenith satellite system (QZSS) centimeter-level augmentation service (CLAS) is based on a new frequency band called L6. The L6 signal is a new type of GNSS signal, and a GNSS antenna corresponding to the frequency of the L6 signal (1275.46 MHz) is required to receive and decode the correction messages. The reception characteristics of the L6 signal are important for receiving correction information. However, the reception performance of antennas supporting the new L6 signal has not been evaluated. Therefore, in this study, we evaluate the reception characteristics of the L6 signal of a compact and lightweight L6-compatible antenna, and the multipath characteristics, which are the fundamental performance of the antenna that affects high-precision positioning. In a 24-hour static test, each antenna’s signal reception performance and multipath characteristics were evaluated, and significant differences were found in performance among the antennas capable of receiving the L6 signal. Furthermore, in a kinematic test, we evaluated high-accuracy positioning using QZSS CLAS with multiple antennas and showed that centimeter-level positioning using L6 augmentation signals is possible even with compact and lightweight GNSS antennas. These evaluations provide guidelines for antenna selection when high-precision positioning using L6 signals is employed in various applications.

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Accurate analytical non-gravitational force model for precise orbit determination of QZS-1, 2, and 4

Ikari,

Akiyama,

Igarashi

et al. 2023

GPS Solut

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MADOCA: Japanese precise orbit and clock determination tool for GNSS

Cited by 16 publications

References 50 publications

Galileo High Accuracy Service in Real-Time PNT, Geoscience and Monitoring Applications

Galileo High Accuracy Service in Real-Time PNT, Geoscience and Monitoring Applications

Evaluation of L6 augmentation signal reception characteristics and positioning accuracy of compact and lightweight GNSS antennas

Accurate analytical non-gravitational force model for precise orbit determination of QZS-1, 2, and 4

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