HDOP reported by iNav is much higher than that read by uCenter · Issue #3716 · iNavFlight/inav · GitHub
![Example result of predicted GPS HDOP performance measure. (Test region... | Download Scientific Diagram Example result of predicted GPS HDOP performance measure. (Test region... | Download Scientific Diagram](https://www.researchgate.net/publication/361487028/figure/fig4/AS:1171441429037057@1656304809565/Example-result-of-predicted-GPS-HDOP-performance-measure-Test-region-is-a-200m-x-200m.png)
Example result of predicted GPS HDOP performance measure. (Test region... | Download Scientific Diagram
![Quadcopter cannot take-off when using Cartographer SLAM for Non-GPS navigation - Copter 4.0 - ArduPilot Discourse Quadcopter cannot take-off when using Cartographer SLAM for Non-GPS navigation - Copter 4.0 - ArduPilot Discourse](https://discuss.ardupilot.org/uploads/default/original/3X/5/f/5fbe82cc4e503e7b47ac8baf89220a88a78aaaf3.png)
Quadcopter cannot take-off when using Cartographer SLAM for Non-GPS navigation - Copter 4.0 - ArduPilot Discourse
AC3.3 : GPS hdop of zero should be treated as a very high value · Issue #2653 · ArduPilot/ardupilot · GitHub
![Remote Sensing | Free Full-Text | Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance Remote Sensing | Free Full-Text | Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance](https://www.mdpi.com/remotesensing/remotesensing-15-00010/article_deploy/html/images/remotesensing-15-00010-g002.png)
Remote Sensing | Free Full-Text | Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance
![Percentage of time when the HDOP, along street DOP and cross street DOP... | Download Scientific Diagram Percentage of time when the HDOP, along street DOP and cross street DOP... | Download Scientific Diagram](https://www.researchgate.net/publication/259423099/figure/fig10/AS:297257837580291@1447883199131/Percentage-of-time-when-the-HDOP-along-street-DOP-and-cross-street-DOP-are-below-5-for.png)