Mabou2
Second Officer
Flight distance : 811257 ft
United States
Offline
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Hi Superdave, I don't have a great answer for why a sonar system doesn't work well in the dark. But there are other considerations for you to ponder when flying in the dark.
The VPS is "Visual Positioning System" pretty much only works at low altitude and requires good light and a ground surface with reasonable texture to function properly. As an example, the VPS gets confused when you are hovering over a river because it sees the water moving and goes a bit kooky at times, can also get kooky if flying low over long grass that is moving in the breeze. In the dark, your drone operates in the same way as if you have turned off the sensors. It becomes much more sensitive to motion input, kind of like being in sport mode.
Keep in mind that Sport mode isn't actually a boosted flight mode, sport mode is closer to being the native way that the bird can fly... NORMAL mode is throttled down in all ways, it flies smoother, can't go as fast, ascends and descends slower... all to make the bird easier to fly.
Maybe you should spend some time flying (in an open field) in sport mode and even ATTI mode, to get a feel for what the bird is really capable of... rather than flying with the Normal (i.e. training wheels) mode. This way you will be more adept at controlling the bird when flying in a situation (like low light, or indoors, or under a bridge, etc) where the sensors and GPS can't function properly.
Onward and Upward,
Matt
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