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DOP.md
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DOP (Dilution of Precision) in Global Navigation Satellite Systems (GNSS) refers to a measure of the geometric quality of the satellite configuration as seen from a receiver. DOP is a dimensionless factor that describes the degree to which the positions of the satellites in the sky affect the accuracy of the calculated position. It gives an indication of the quality of the satellite geometry and the precision of the calculated position. DOP (Dilution of Precision) in Global Navigation Satellite Systems (GNSS) refers to a measure of the geometric quality of the satellite configuration as seen from a receiver. DOP is a dimensionless factor that describes the degree to which the positions of the satellites in the sky affect the accuracy of the calculated position. It gives an indication of the quality of the satellite geometry and the precision of the calculated position.
[![télécharger](uploads/0b9917fd8c9c3b90390cf3e299051924/télécharger.jpg)](https://www.marine-pilots.com/articles/14518-gps-part-2-physical-and-technical-errors-of-gnss-error-analysis)
_This image shows how satellite positions impact the DOP._
**There are several types of DOP values, including:** **There are several types of DOP values, including:**
**- PDOP (Position Dilution of Precision):** Indicates the dilution of precision in the calculated position of the receiver. A lower PDOP value indicates a better satellite geometry and a more precise calculated position. **- PDOP (Position Dilution of Precision):** Indicates the dilution of precision in the calculated position of the receiver. A lower PDOP value indicates a better satellite geometry and a more precise calculated position.
...@@ -12,4 +17,12 @@ DOP (Dilution of Precision) in Global Navigation Satellite Systems (GNSS) refers ...@@ -12,4 +17,12 @@ DOP (Dilution of Precision) in Global Navigation Satellite Systems (GNSS) refers
The DOP values are calculated based on the positions of the satellites in the sky and the receiver's position. A high DOP value indicates that the satellites are not well-distributed in the sky and that the calculated position may be less accurate. A low DOP value indicates that the satellites are well-distributed in the sky and that the calculated position is likely to be more accurate. The DOP values are calculated based on the positions of the satellites in the sky and the receiver's position. A high DOP value indicates that the satellites are not well-distributed in the sky and that the calculated position may be less accurate. A low DOP value indicates that the satellites are well-distributed in the sky and that the calculated position is likely to be more accurate.
Overall, DOP in GNSS is a measure of the geometric quality of the satellite configuration as seen from a receiver. It gives an indication of the quality of the satellite geometry and the precision of the calculated position, it is used by the receiver to determine the quality of the signal and make adjustments accordingly. The DOP values are calculated based on the positions of the satellites in the sky and the receiver's position, a low DOP value indicates that the satellites are well-distributed in the sky and that the calculated position is likely to be more accurate. [![2-Figure2-1](uploads/6de1a2ea8e377f102dee10682f8bf0bc/2-Figure2-1.png)](https://www.semanticscholar.org/paper/Analysis-of-DOP-and-its-preciseness-in-GNSS-Tahsin-Sultana/f01b3b112af4eb41696932f63931e6e16a36a8ab)
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_This picture how the geometry impacts the measurement errors._
Overall, DOP in GNSS is a measure of the geometric quality of the satellite configuration as seen from a receiver. It gives an indication of the quality of the satellite geometry and the precision of the calculated position, it is used by the receiver to determine the quality of the signal and make adjustments accordingly. The DOP values are calculated based on the positions of the satellites in the sky and the receiver's position, a low DOP value indicates that the satellites are well-distributed in the sky and that the calculated position is likely to be more accurate.
Sources :
- Jean Marie Zogg, GPS und GNSS: Grundlagen der Ortung und Navigation mit Satelliten, [https://zogg-jm.ch/Dateien/Update_Zogg_Deutsche_Version_Jan_09_Version_Z4x.pdf](http://zogg-jm.ch/Dateien/Update_Zogg_Deutsche_Version_Jan_09_Version_Z4x.pdf), 2014 S. 93
- M. Tahsin, S. Sultana, T. Reza, Md. Hossam-E.-Haider, (2015) Analysis of DOP and its preciseness in GNSS position estimation, DOI:10.1109/ICEEICT.2015.7307445Corpus ID: 18197093
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