>From an article in the IEEE magazine: We use a cellphone-grade IMU, a laser altimeter (from SparkFun), and a downward-pointing VGA camera for monocular feature tracking. A few dozen features are compared frame to frame to track relative position to figure out direction and speed, which is how the helicopter navigates. It’s all done by estimates of position, as opposed to memorizing features or creating a map.
From: Chuck McCown Sent: Thursday, February 18, 2021 3:38 PM To: af@af.afmug.com Subject: Re: OT Helicopter on Mars Oh, silly me, GPS of course... From: Chuck McCown Sent: Thursday, February 18, 2021 3:37 PM To: af@af.afmug.com Subject: OT Helicopter on Mars I wonder how it navigates. I presume a barometric altimeter will work there. But how would they get bearing and distance from the ground vehicle? You could use a Doppler antenna array to get a bearing I suppose. And maybe some kind of DME for distance. Like to see a write up on that.
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