Gunship9
Second Officer
United States
Offline
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Travel With Kat Posted at 2018-2-9 06:57
I don't remember. I don't think so. It just said no GPS and wouldn't let me fly.
When I tried it again at home this morning. The ATTI function kicked in and announced it out loud so i think I would have noticed it if it had when the GPS initially stopped working.
I think Spark gets GPS information from the phone/DJI Go app so it knows where it is, and when it is, so it knows what satellites should be overhead to look for.
If your phone is not giving time or place information to the DJI Go app, the Spark has to start with a default date and time 0.0 long and 0.0 lat. Then it looks for each of 24+ gps satellites that could be overhead at that location. Once it has lucked upon a satellite, it can download current GPS satellite orbits and locations. A possible long download from the satellite signal. Most receivers keep a clock and memory of where they were last to speed up lock-on, but this can be deleted with power off, or over written by bad data.
That is why sometimes the GPS lock-on is fast, and why it is sometimes slow as the ice age. |
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