Wide-Area GNSS Corrections for Precise Positioning and Navigation in Agriculture
| Autor: | Hernandez-Pajares, M, Olivares-Pulido, G, Graffigna, V, Garcia-Rigo, A, Lyu, H, Roma-Dollase, D, de Lacy, MC, Fernandez-Prades, C, Arribas, J, Tisropoulos, Z, Schmidt, M, Goss, A, Erdogan, E, van Evert, FK, Blok, PM, Grosso, J, Spaltro, E, Dominguez, J, Lopez, E, Hriscu, A |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Remote Sensing r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) Universitat Oberta de Catalunya (UOC) |
| ISSN: | 2072-4292 |
| Popis: | This paper characterizes, with static and roving GNSS receivers in the context of precision agriculture research, the hybrid ionospheric-geodetic GNSS model Wide-Area Real-Time Kinematics (WARTK), which computes and broadcasts real-time corrections for high-precision GNSS positioning and navigation within sparse GNSS receiver networks. This research is motivated by the potential benefits of the low-cost precise WARTK technique on mass-market applications such as precision agriculture. The results from two experiments summarized in this work, the second one involving a working spraying tractor, show, firstly, that the corrections from the model are in good agreement with the corrections provided by IGS (International GNSS Services) analysis centers computed in post-processing from global GNSS data. Moreover, secondly and most importantly, we have shown that WARTK provides navigation solutions at decimeter-level accuracy, and the ionospheric corrections significantly reduce the computational time for ambiguity estimation: up to convergence times for the 50%, 75% and 95% of cases equal or below 30 s (single-epoch), 150 s and 600 s approximately, vs. 1000 s, 2750 s and 4850 s without ionospheric corrections, everything for a roving receiver at more than 100 km far away from the nearest permanent receiver. The real-time horizontal position errors reach up to 3 cm, 5 cm and 12 cm for 50%, 75% and 95% of cases, respectively, by constraining and continuously updating the ambiguities without updating the permanent receiver coordinates, vs. the 6 cm, 12 cm and 32 cm, respectively, in the same conditions but without WARTK ionospheric corrections. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|