Real-Time Precise Zenith Tropospheric Delay Estimation With BDS PPP-B2b, Galileo HAS, and QZSS MADOCA-PPP Services | IEEE Journals & Magazine | IEEE Xplore
Scheduled Maintenance: On Tuesday, 14 January, IEEE Xplore will undergo scheduled maintenance from 1:00-5:00 PM ET (1800-2200 UTC). During this time, there may be intermittent impact on performance. We apologize for any inconvenience.

Real-Time Precise Zenith Tropospheric Delay Estimation With BDS PPP-B2b, Galileo HAS, and QZSS MADOCA-PPP Services

Publisher: IEEE

Abstract:

Real-time precise point positioning (PPP) is an innovative and useful atmosphere remote sensing tool to estimate zenith tropospheric delays (ZTDs) to support various emer...View more

Abstract:

Real-time precise point positioning (PPP) is an innovative and useful atmosphere remote sensing tool to estimate zenith tropospheric delays (ZTDs) to support various emerging meteorological applications such as weather and climate research. However, additional costs on internet accesses or service subscription licenses are required to obtain real-time precise satellite orbit and clock products from external PPP augmentation service operators. We present the real-time precise estimation of ZTD with freely and openly accessible GNSS satellite-based PPP augmentation services, i.e., BeiDou navigation satellite system (BDS) PPP-B2b service, Galileo high accuracy service (HAS), and quasi-zenith satellite system (QZSS) Multi-GNSS ADvanced Orbit and Clock Augmentation-PPP (MADOCA-PPP) service. GNSS observations of 49 days from 15 stations in the Asia-Pacific region are used for performance assessment and comparison. It shows that the real-time PPP estimated ZTDs agree well with International GNSS Service (IGS) final ZTDs, with mean standard deviation (STD) values of 20.0, 17.5, and 9.5 mm for BDS PPP-B2b, Galileo HAS, and QZSS MADOCA-PPP, respectively. The derived real-time zenith wet delays (ZWDs) are further compared with those derived from Integrated Global Radiosonde Archive (IGRA) and the European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis v5 (ERA5) datasets, which confirms that the real-time PPP estimated ZWDs are accurate with mean STDs of smaller than 30 mm. It concludes that real-time PPP with GNSS satellite-based real-time PPP augmentation correction services will be a flexible and cost-effective tool to derive real-time precise ZTDs/ZWDs with high spatiotemporal resolution in all-weather conditions.
Article Sequence Number: 5802011
Date of Publication: 15 August 2024

ISSN Information:

Publisher: IEEE

Funding Agency:


References

References is not available for this document.