SBAS Australian-NZ Test Bed: Exploring New Services

Sobreira, Hugo; Bougard, Bruno; Barrios, Julián; Calle, J. David

doi:10.33012/2018.15849

Cited by 4 publications

(3 citation statements)

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“…In addition to the commercial services, high-precision GNSS products are nowadays also directly broadcast by navigation satellites from the Japanese Quasi-Zenith Satellite System (QZSS) within, e.g., the Multi-GNSS Advanced Demonstration of Orbit and Clock Analysis (MADOCA) service and the centimeter level augmentation service (CLAS) [ 30 ]. Another example is the new generation of the satellite-based augmentation system (SBAS) initiated by Australia and New Zealand, which broadcasted high-precision PPP corrections via L1 and L5 to the GPS and GPS/Galileo users, respectively, within the test bed [ 31 , 32 ]. Although the current service areas of the QZSS- and the SBAS-based PPP corrections are still limited to the Asia-Pacific region, with the increase in the number of new-generation SBAS services (expected for the Wide Area Augmentation System (WAAS) and the European Geostationary Navigation Overlay Service (EGNOS), etc.…”

Section: Processing Proceduresmentioning

confidence: 99%

Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites

Wang

El‐Mowafy

2020

Sensors

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With thousands of low Earth orbit (LEO) satellites to be launched in the near future, LEO mega-constellations are supposed to significantly change the positioning and navigation service for ground users. The goal of this contribution is to suggest and discuss the feasibility of possible procedures to generate the LEO orbital products at two accuracy levels to facilitate different positioning methods—i.e., Level A orbits with meter-level accuracy as LEO-specific broadcast ephemeris, and Level B orbits with an accuracy of centimeters as polynomial corrections based on Level A orbits. Real data of the LEO satellite GRACE FO-1 are used for analyzing the error budgets. For the Level A products, compared to the orbital user range errors (OUREs) of a few centimeters introduced by the ephemeris fitting, it was found that the orbital prediction errors play the dominant role in the total error budget—i.e., at around 0.1, 0.2 and 1 m for prediction intervals of 1, 2 and 6 h, respectively. For the Level B products, the predicted orbits within a short period of up to 60 s have an OURE of a few centimeters, while the polynomial fitting OUREs can be reduced by a few millimeters when increasing the polynomial degree from one to two.

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Section: Processing Proceduresmentioning

confidence: 99%

Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites

Wang

El‐Mowafy

2020

Sensors

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“…url: https://link.springer.com/article/10.1007%2Fs10291-020-01078-8 enable a good measurement geometry and simulate the conditions when more satellites broadcast L5 signals are available. For SBAS-aided L5 PPP service, e.g., tests have also demonstrated a dm-level 3D accuracy for static stations in the open-sky situations (Sobreira et al 2018), and at decimeters for road transport in suburban environments (El-Mowafy et al 2020). Although both products (MADOCA and SBAS) have currently regional service over the Asia-Pacific region, in this research, we investigate their potential benefits to the LEO POD, expecting that similar services can be provided by more regional/global navigation satellite systems or SBASs in the future, and global coverage can be reached.…”

Section: Introductionmentioning

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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“…SBAS is moving towards a newer generation, providing to dual-frequency multi-constellation (DFMC) users observation corrections and integrity information. A test-bed of the new generation of SBAS was initiated in Australia and New Zealand in 2017 in preparation for building an operational system [4]. The users eliminated the first-order ionospheric delays by forming the ionosphere-free (IF) linear combination and an improved measurement geometry are also available through the use of both GPS and Galileo signals.…”

Section: Introductionmentioning

confidence: 99%

Integrity Monitoring Using ARAIM for Bridging DFMC SBAS Outages in Road Transport

Wang¹,

El‐Mowafy²,

Wu³

2020

Proceedings of the 33rd International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 202

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SBAS Australian-NZ Test Bed: Exploring New Services

Cited by 4 publications

References 0 publications

Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites

Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites

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

Integrity Monitoring Using ARAIM for Bridging DFMC SBAS Outages in Road Transport

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