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WARTK Standards: Difference between revisions
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The Wide Area RTK (WARTK) concept was introduced in the late 1990s by the [http://www.gage.es/ Research Group of Astronomy and Geomatics (gAGE)] from the Technical University of Catalonia (UPC). The WARTK method increases the RTK/NRTK service area, with permanent stations separated by up to 500–900 kilometers. RTK reference stations should be of the order of ten km distance from rover, because the ionosphere produces ambiguity estimation biases that lead to positioning error above 1 meter. The main [[WARTK Fundamentals|WARTK techniques]] are related to an accurate real-time computation of ionospheric corrections, combined with an optimal processing of GNSS observables (carrier phases in particular) in both 2 and 3-frequency GNSS systems. | The Wide Area RTK (WARTK) concept was introduced in the late 1990s by the [http://www.gage.es/ Research Group of Astronomy and Geomatics (gAGE)] from the Technical University of Catalonia (UPC). The WARTK method increases the RTK/NRTK service area, with permanent stations separated by up to 500–900 kilometers. RTK reference stations should be of the order of ten km distance from rover, because the ionosphere produces ambiguity estimation biases that lead to positioning error above 1 meter. The main [[Work in Progress:WARTK Fundamentals|WARTK techniques]] are related to an accurate real-time computation of ionospheric corrections, combined with an optimal processing of GNSS observables (carrier phases in particular) in both 2 and 3-frequency GNSS systems. | ||
==WARTK Standards== | ==WARTK Standards== | ||
As WARTK is based on RTK, the same standards applied in [[RTK Standards|RTK]] could be applicable to WARTK. The main difference is that the ionospheric delay is not assumed to be the same as the reference station but it is broadcasted to the users, implying additional messages. This ionospheric delay is computed in a CPF using a real-time model of ionosphere. The main features of the [[WARTK Fundamentals|WARTK technique]] for dual-frequency and three-frequency data are patented: | As WARTK is based on RTK, the same standards applied in [[Work in Progress:RTK Standards|RTK]] could be applicable to WARTK. The main difference is that the ionospheric delay is not assumed to be the same as the reference station but it is broadcasted to the users, implying additional messages. This ionospheric delay is computed in a CPF using a real-time model of ionosphere. The main features of the [[Work in Progress:WARTK Fundamentals|WARTK technique]] for dual-frequency and three-frequency data are patented: | ||
* Wide Area RTK (WARTK), in 1999. UPC-Patent Nbr.992585. | * Wide Area RTK (WARTK), in 1999. UPC-Patent Nbr.992585. | ||
* WARTK for 3 frequencies (WARTK-3), in 2002. ESA Patent Nbr.02-12627. | * WARTK for 3 frequencies (WARTK-3), in 2002. ESA Patent Nbr.02-12627. | ||
Revision as of 14:25, 28 June 2011
| Fundamentals | |
|---|---|
| Title | WARTK Standards |
| Author(s) | GMV |
| Level | Basic |
| Year of Publication | 2011 |
The Wide Area RTK (WARTK) concept was introduced in the late 1990s by the Research Group of Astronomy and Geomatics (gAGE) from the Technical University of Catalonia (UPC). The WARTK method increases the RTK/NRTK service area, with permanent stations separated by up to 500–900 kilometers. RTK reference stations should be of the order of ten km distance from rover, because the ionosphere produces ambiguity estimation biases that lead to positioning error above 1 meter. The main WARTK techniques are related to an accurate real-time computation of ionospheric corrections, combined with an optimal processing of GNSS observables (carrier phases in particular) in both 2 and 3-frequency GNSS systems.
WARTK Standards
As WARTK is based on RTK, the same standards applied in RTK could be applicable to WARTK. The main difference is that the ionospheric delay is not assumed to be the same as the reference station but it is broadcasted to the users, implying additional messages. This ionospheric delay is computed in a CPF using a real-time model of ionosphere. The main features of the WARTK technique for dual-frequency and three-frequency data are patented:
- Wide Area RTK (WARTK), in 1999. UPC-Patent Nbr.992585.
- WARTK for 3 frequencies (WARTK-3), in 2002. ESA Patent Nbr.02-12627.
Notes