Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators
The Global Navigation Satellite System (GNSS) Precise Point Positioning (PPP) service provides real-time high precision positioning worldwide. It is essential to monitor precise satellite orbit and clock product quality for early alerts to GNSS users. This paper introduces a server-side method to g...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2025
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| Online Access: | http://hdl.handle.net/20.500.11937/96941 |
| _version_ | 1848766211415867392 |
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| author | Xie, Mingqiang Liu, A. Wang, N. El-mowafy, Ahmed Wang, Z. Wei, D. |
| author_facet | Xie, Mingqiang Liu, A. Wang, N. El-mowafy, Ahmed Wang, Z. Wei, D. |
| author_sort | Xie, Mingqiang |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The Global Navigation Satellite System (GNSS) Precise Point Positioning (PPP) service provides real-time high precision positioning worldwide. It is essential to monitor precise satellite orbit and clock product quality for
early alerts to GNSS users. This paper introduces a server-side method to generate Health Indicators (HI) for
satellite corrections. Phase residuals from historical data are modeled as a Residual Hemisphere Map (RHM) to
establish monitoring thresholds based on satellite elevation and azimuth. A satellite subset separation scheme is used to identify all faulty satellites by comparing real-time phase residuals with the corresponding thresholds.
Tests using data from 30 IGS stations show that the RHM-derived thresholds effectively bound residuals under
fault-free conditions. Moreover, the method detects single satellite faults over 5 cm immediately and ramp errors
of 1 cm/epoch within 5 epochs, as well as multiple simultaneous faults. The HI generated can be broadcast to users for excluding faulty satellites. |
| first_indexed | 2025-11-14T11:47:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-96941 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:47:32Z |
| publishDate | 2025 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-969412025-02-21T05:38:39Z Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators Xie, Mingqiang Liu, A. Wang, N. El-mowafy, Ahmed Wang, Z. Wei, D. The Global Navigation Satellite System (GNSS) Precise Point Positioning (PPP) service provides real-time high precision positioning worldwide. It is essential to monitor precise satellite orbit and clock product quality for early alerts to GNSS users. This paper introduces a server-side method to generate Health Indicators (HI) for satellite corrections. Phase residuals from historical data are modeled as a Residual Hemisphere Map (RHM) to establish monitoring thresholds based on satellite elevation and azimuth. A satellite subset separation scheme is used to identify all faulty satellites by comparing real-time phase residuals with the corresponding thresholds. Tests using data from 30 IGS stations show that the RHM-derived thresholds effectively bound residuals under fault-free conditions. Moreover, the method detects single satellite faults over 5 cm immediately and ramp errors of 1 cm/epoch within 5 epochs, as well as multiple simultaneous faults. The HI generated can be broadcast to users for excluding faulty satellites. 2025 Journal Article http://hdl.handle.net/20.500.11937/96941 10.1016/j.measurement.2025.116707 Elsevier restricted |
| spellingShingle | Xie, Mingqiang Liu, A. Wang, N. El-mowafy, Ahmed Wang, Z. Wei, D. Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title | Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title_full | Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title_fullStr | Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title_full_unstemmed | Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title_short | Quality Monitoring of Real-Time Precise Satellite Orbit and Clock Corrections for Generating Health Indicators |
| title_sort | quality monitoring of real-time precise satellite orbit and clock corrections for generating health indicators |
| url | http://hdl.handle.net/20.500.11937/96941 |