Instructions

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- Thesystemmayfailtolocatepositionwhentheaircraftiesfastatalowaltitude(0.5meterbelow).
- Thesurfacesinpurecolors(suchaspureblack,purewhite,purered,puregreen).
- Highlyreectivesurfaces.
- Waterbodiesorthetransparentsurfaces.
- Thesurfacesofmovingobjects(suchasthecrowds,andbushesorbrushwoodwithstrongwindblowing).
- Theenvironmentwherethelightchangesrapidly.
- Badly-lit(lightintensitylessthan300lux)orbrightly-lit(lightintensitymorethan10,000lux)surfacesofthe
objects.
- Poorly-texturedsurfaces.
- Thesurfacesthathavebeenfeaturedwithhighly-repeatedtextures(suchassame-coloredcheckerbricks).
- Tinybarriers.
- Controltheaircrafttoyatanappropriatespeedofabout5m/satthealtitudeof1meter.