Thanks for the help.Even though the fog may have not been present in your location, the atmosphere is satiated with moisture and it doesn't take much to "fog" the sensors and give the error.
Especially with the prop wash whirling around the Spark which may generate a little bit of condensation on the lens in a moist environment.
About halfway through my flight with the Spark I received the error message "Downward Infared sensor failure". Anyone have any ideas on what could cause this? Fog was starting to roll in but it wasn't really foggy where the drone was.
Yep, been there done that, got the cracked lens ? . Stay away from fog/mist!One thing to be mindful of when you get this error message is that you may get erratic ascend-descend speeds. In some cases, the AC may even ascend on its own and before you realise what happened, you may lose VLOS.
There are quite a few cases documented in this forum. I am sharing a recent one which comes to mind.
Camera lens cracked as a result of mist/fog causing infrared sensor failure
Good day all, So yesterday the unfortunate happened... I was flying on a mountain pass, taking photos of the mist as it was coming in from the ocean. I was caught off guard a bit by die speed in which the mist suddenly descended on me. Knowing that mist/fog and the spark don't mix, I...sparkpilots.com
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