Kinematic GPS Precise Point Positioning for Sea Level Monitoring with GPS Buoy

Chen, Wu; Hu, Chengjin; Li, Zhihua; Chen, Yongqi; Ding, Xiaoli; Gao, Shan; Ji, Shengyue

doi:10.5081/jgps.3.1.302

Cited by 25 publications

(10 citation statements)

References 8 publications

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“…This accuracy satisfies most positioning needs for a highly varied sea surface. When the IGS rapid product is used for PPP, the RMSE difference is 4 -7 cm in the horizontal component and 11 -18 cm in the vertical, which agrees with the computation provided by Chen et al (2004). When the observed half of the IGS ultrarapid product is used, the RMSE difference is 9 -27 cm in the horizontal component and 23 -44 cm in the vertical.…”

Section: Discussionsupporting

confidence: 73%

“…Because absolute and precise [3D RMS kinematic: < 1 m; static: < 0.1 m (Li et al 2009)] positioning can be obtained with one single receiver, the PPP method has been widely applied to many disciplines of research; for example, Zhang and Andersen (2006) successfully measured the surface ice flow velocity and the tide retrieval of the Amery ice shelf with a GPS using PPP instead of a DGPS method. Chen et al (2004) estimated the coordinates of GPS buoys using precise ephemerides and satellite clock error data of the International GNSS Service (IGS) rapid product, whose latency is 17 hours, with kinematic PPP technique and found that the root mean square error (RMSE) is around 10 -20 cm compared to the positioning solution derived by DGPS. However, there is no independent data to absolutely evaluate a GPS buoy solution like tide gauge records.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Frequency Sea Level Variations Observed by GPS Buoys Using Precise Point Positioning Technique

Kuo¹,

Chiu

Chiang³

et al. 2012

Terr. Atmos. Ocean. Sci.

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In this study, sea level variation observed by a 1-Hz Global Positioning System (GPS) buoy system is verified by comparing with tide gauge records and is decomposed to reveal high-frequency signals that cannot be detected from 6-minute tide gauge records. Compared to tide gauges traditionally used to monitor sea level changes and affected by land motion, GPS buoys provide high-frequency geocentric measurements of sea level variations. Data from five GPS buoy campaigns near a tide gauge at Anping, Tainan, Taiwan, were processed using the Precise Point Positioning (PPP) technique with four different satellite orbit products from the International GNSS Service (IGS). The GPS buoy data were also processed by a differential GPS (DGPS) method that needs an additional GPS receiver as a reference station and the accuracy of the solution depends on the baseline length. The computation shows the average Root Mean Square Error (RMSE) difference of the GPS buoy using DGPS and tide gauge records is around 3 -5 cm. When using the aforementioned IGS orbit products for the buoy derived by PPP, its average RMSE differences are 5 -8 cm, 8 -13 cm, decimeter level, and decimeter-meter level, respectively, so the accuracy of the solution derived by PPP highly depends on the accuracy of IGS orbit products. Therefore, the result indicates that the accuracy of a GPS buoy using PPP has the potential to measure the sea surface variations to several cm. Finally, highfrequency sea level signals with periods of a few seconds to a day can be successfully detected in GPS buoy observations using the Ensemble Empirical Mode Decomposition (EMD) method and are identified as waves, meteotsunamis, and tides.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

High-Frequency Sea Level Variations Observed by GPS Buoys Using Precise Point Positioning Technique

Kuo¹,

Chiu

Chiang³

et al. 2012

Terr. Atmos. Ocean. Sci.

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“…The main algorithms and correction models for the GPS PPP have been discussed in many papers (Han et al, 2001;Kouba and Heroux, 2001;Holfmann et al, 2003;Chen et al, 2004) and the most widely used data type is un-differenced ionosphere-free carrier phase measurements, or an ionospherefree combination with carrier phase and code pseudorange measurements. An alternative data type used by some studies is code-phase ionosphere-free combination that aims at accelerating the convergence speed for parameter solutions (Gao and Chen, 2004).…”

Section: Gps Precise Point Positioning For Aerial Triangulationmentioning

confidence: 99%

The application of GPS precise point positioning technology in aerial triangulation

Yuan

Sun

et al. 2009

ISPRS Journal of Photogrammetry and Remote Sensing

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“…Recently, a few attempts have been made to estimate the instantaneous sea surface height by processing the GPS data from buoys with the precise point positioning technique (PPP) (e.g., Colombo, 2004;Chen et al, 2004;Geng et al, 2010). However, a realtime network and a GPS real-time processing infrastructure would be necessary to provide updated orbit and clock products in-time when PPP is used in tsunami warning systems.…”

Section: Operational Conceptmentioning

confidence: 99%

GPS water level measurements for Indonesia's Tsunami Early Warning System

Schöne

Pandoe

Mudita

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract. On Boxing Day 2004, a severe tsunami was generated by a strong earthquake in Northern Sumatra causing a large number of casualties. At this time, neither an offshore buoy network was in place to measure tsunami waves, nor a system to disseminate tsunami warnings to local governmental entities. Since then, buoys have been developed by Indonesia and Germany, complemented by NOAA's Deep-ocean Assessment and Reporting of Tsunamis (DART) buoys, and have been moored offshore Sumatra and Java. The suite of sensors for offshore tsunami detection in Indonesia has been advanced by adding GPS technology for water level measurements.The usage of GPS buoys in tsunami warning systems is a relatively new approach. The concept of the German Indonesian Tsunami Early Warning System (GITEWS) (Rudloff et al., 2009) combines GPS technology and ocean bottom pressure (OBP) measurements. Especially for nearfield installations where the seismic noise may deteriorate the OBP data, GPS-derived sea level heights provide additional information.The GPS buoy technology is precise enough to detect medium to large tsunamis of amplitudes larger than 10 cm. The analysis presented here suggests that for about 68% of the time, tsunamis larger than 5 cm may be detectable.

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Kinematic GPS Precise Point Positioning for Sea Level Monitoring with GPS Buoy

Cited by 25 publications

References 8 publications

High-Frequency Sea Level Variations Observed by GPS Buoys Using Precise Point Positioning Technique

High-Frequency Sea Level Variations Observed by GPS Buoys Using Precise Point Positioning Technique

The application of GPS precise point positioning technology in aerial triangulation

GPS water level measurements for Indonesia's Tsunami Early Warning System

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