Update on Australia and New Zealand DFMC SBAS and PPP System Results

Barrios, Julián; Caro, J.; Calle, J. David; Carbonell, E.; Pericacho, José Gabriel; Fernández, Guillermo; Esteban, Victor Manuel; Fernández, Miguel A.; Bravo, Fernando; Torres, Borja; Calabrese, Alessandra; Diaz, Armais; Rodríguez, Iván González; Lainez, Maria D.; Romay, Miguel M.; Jackson, Robert L.; Reddan, Patrick E.; Bunce, Deane; Soddu, Claudio

doi:10.33012/2018.15932

Cited by 15 publications

(9 citation statements)

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“…In addition to the commercial services, the Japanese Quasi-Zenith Satellite System (QZSS) also provides the orbits and clock corrections through the L6 signal broadcast by the navigation satellites (Cabinet Office 2020) within the Multi-GNSS Advanced Demonstration Tool for Orbit and Clock Analysis (MADOCA) service. Moreover, the newgeneration Australia/New-Zealand Satellite-Based Augmentation System (AU/NZ-SBAS) broadcasts real-time precise orbit and clock corrections to enable PPP through a GEO link (Barrios et al 2018). These two free-of-charge services are available only over the Asia-Pacific region.…”

Section: Real-time Gnss Precise Orbits and Clocksmentioning

confidence: 99%

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

2022

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Precise orbit determination (POD) is the procedure for determining the orbit of a satellite with high accuracy. Compared with global navigation satellite systems (GNSS), the low Earth orbit (LEO) satellites have some different features in space, mainly due to perturbations caused by dynamic forces related to their altitudes. Methods for POD of LEO satellites have been developed over the last decades. Nowadays, postprocessed precise orbits are used in different space applications such as radio occultation, satellite altimetry, and interferometric syntheticaperture radar missions. The advancements in technology decrease the size of LEO satellites and developments in theory increase their orbital accuracy. In recent years, onboard POD has become a hot topic in the navigation and positioning field, which is crucial for, e.g., formation flying of small satellites and GNSS-aided LEO megaconstellations for positioning purposes. This contribution reviews LEO POD methods based on undifferenced GNSS observations in both postmission and real-time data processing. It comprises the quality control step, the models used and their limitations, processing algorithms, and different validation methods. To have a clear insight into the current and the future state of the LEO POD, the most recent developments and important achievements are also discussed.

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Section: Real-time Gnss Precise Orbits and Clocksmentioning

confidence: 99%

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

2022

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“…The network used to estimate the precise orbits and clocks for AU/NZ SBAS consists of stations from the Australian regional GNSS network, the south pacific GNSS network, the Land Information New Zealand (LINZ) PositioNZ network, and the IGS network. GNSS satellite orbit and clock corrections are estimated at Uralla station in New South Wales, Australia, and transferred to the Inmarsat-4F1 GEO satellite through the uplink system (Barrios et al 2018).…”

Section: Analysis Of the Precise Orbits And Clocks Used For Podmentioning

confidence: 99%

POD of small LEO satellites based on precise real-time MADOCA and SBAS-aided PPP corrections

2021

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For real-time precise orbit determination (POD) of low earth orbit (LEO) satellites, high-accuracy global navigation satellite system (GNSS) orbit and clock products are necessary in real-time. Recently, the Japanese multi-GNSS advanced demonstration of orbit and clock analysis (MADOCA) precise point positioning (PPP) service and the new generation of the Australian/New-Zealand satellite-based augmentation system (SBAS) aided PPP service, provide free and precise GNSS products that are directly broadcast through the navigation and geostationary earth orbit (GEO) satellites, respectively. With the high quality of both products shown in this study, a 3D accuracy of centimeters can be achieved in the postprocessing mode for the reduced-dynamic orbits of small LEO satellites having a duty cycle down to 40%, and at sub-dm to dm-level for the kinematic orbits. The results show a promising future for high-accuracy real-time POD onboard LEO satellites benefiting from the precise free-of-charge PPP corrections broadcast by navigation systems or SBAS.

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“…The space segment consists of GPS and Galileo satellites, and the GEO satellite Inmarsat-4F1 (PRN 122) that transmits the SBAS signals. The support segment is a magicGNSS Web Monitor at the GMV's premises in Spain which monitors the system and service performance [7,10].…”

Section: Description Of the Aus/nz Sbasmentioning

confidence: 99%

“…Preliminary SBAS test-bed messages and positioning results have been reported in [1,7,8]. Under good satellite visibility conditions, accuracy at sub-m was obtained when using SBAS L1 and DFMC, and at sub-decimeter using PPP.…”

Section: Introduction (Heading 1)mentioning

confidence: 96%

Performance Analysis of Using the Next generation Australian SBAS with Precise Point Positioning Capability For Intelligent Transport Systems

El‐Mowafy

Cheung²,

Rubinov³

2019

2019 European Navigation Conference (ENC)

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In 2018, a next-generation Satellite-Based Augmentation System (SBAS) test-bed was launched in Australia/New-Zealand in preparation for building an operational system. This new generation SBAS includes L1 legacy SBAS, new dual-frequency multi-constellation (DFMC) SBAS, and orbit and clock corrections for precise point positioning (PPP) using GPS and Galileo. In this paper, the next generation SBAS and its models are first presented, and the benefits of using its new components are discussed. Test results for lane identification applications in Intelligent Transport Systems (ITS) are presented and analyzed. Kinematic tests were performed in different ITS environments. These are characterized by different levels of sky-visibility and multipath, including clear sky, suburban, low-density urban, and high-density urban environments. Performance analysis show that results vary widely depending on the operational conditions but all SBAS solutions have better positioning accuracy compared with the standalone solutions that are currently used in transport applications. The DFMC SBAS slightly outperformed the L1 SBAS, with accuracy at submeter, and it has advantages during periods of fluctuations of the ionosphere with an extended coverage area. As expected, the SBAS-based PPP solutions have shown to give the best positioning precision and accuracy among all tested solution types, with sub-decimeter level accuracy, provided that enough convergence time is available. The paper concluded by giving remarks on the use of this new technology for ITS.

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Update on Australia and New Zealand DFMC SBAS and PPP System Results

Cited by 15 publications

References 0 publications

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

POD of small LEO satellites based on precise real-time MADOCA and SBAS-aided PPP corrections

Performance Analysis of Using the Next generation Australian SBAS with Precise Point Positioning Capability For Intelligent Transport Systems

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