![]() The above image shows what you get when the GPS is finally good enough. A really good speed accuracy is 0.3 or less. Note that while the Speed Accuracy is below 1.0, it is still not good. The Speed Accuracy is good enough (it is below 1.0), but the position accuracy is too high (it is over 9 meters) and the height accuracy is also bad (at over 8 meters). The above shows an example where it has 8 satellites but is not yet good enough for GPS flight. For GPS to be good enough for flight it needs to meet the following conditions continuously for 10 seconds: While the above shows 3D lock, it is not yet good enough for ArduPilot to use the GPS to fly in a GPS flight mode. In the above case the drone was in a position with poor view of the sky (it was on a verandah, with many trees above it). The Fix time shows how long it took to get 3D lock.The Speed Accuracy is now much lower, but not yet below the critical threshold of 1.0.This means the GPS is still not good enough FixType is 3 or larger, meaning it has 3D lock (it may be 4 if the GPS can see a SBAS satellite).Once the GPS gets 3D lock then you will get status like this: ![]() The app will do this for you in a future version, or the web interface will do it on the status page. You can manually copy the file from to the UBLOX directory on your microSD. It should look like this in Īs shown in the image, the filename for the MGA data on the microSD card is UBLOX\OFFLINE.UBX If you are seeing a zero MGA Cache Size then check it is downloading correctly to the microSD. That file is needed to allow for faster GPS lock. If the MGA Cache Size is zero then please check if you can download the above OFFLINE.UBX file. Time Source: this is where the GPS got its estimate of the time from (2 means from the web browser).Pos Source: this is where the GPS got its estimate of position from (2 means from the web browser).The size of this cache should match the current file at MGA Cache Size: the MGA cache is the downloaded file that gives the satellite orbits.Latitude/Longitude: the current lat/lon where it is searching.EKF Status: “bad” means the GPS is not yet able to be used.NumSats: the number of satellites found.FixType 1: that means it has found a GPS (there is a GPS attached), but it doesn’t yet have GPS lock.The above image shows what happens when the SkyViper is searching for GPS lock. Start off by opening the web interface, and looking at the GPS tab of the status page: If you have poor GPS performance then please follow the guide below to help diagnose the cause. The GPS tab in the status page is useful to show you progress towards GPS lock as well as information regarding the MGA data cache. It is automatically pulled down to the Sky Viper Video Viewer app when connecting to the internet and will update once connected to the drone if the current data is out of date. The fastest GPS Lock is achieved by having up to date MGA UBLOX assistance data. If your Sky Viper does not perform as expected, there are a few things to try.
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