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Stuck above the clouds/fog
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<blockquote data-quote="Dronason" data-source="post: 8438" data-attributes="member: 553"><p>GPS is not used for altitude, too unreliable. Barometer is mainly used for general altitude control. But when the laser vertical sensor give a value (this depend on the kind of soil, 5-10m) (15-30 feet) , it is also used. If the returned value is bellow 30 cm (1 feet) it turn as a ground proximity alarm. Try to put your hand bellow that range under the Spark (like palm landing) when it is hovering, it will goes up. </p><p>When you manually land (full stick down), it will stop at that distance and then do an automatic landing. </p><p>There was a thread were the Spark auto landed just because it's laser sensor was reporting it was near the ground.</p></blockquote><p></p>
[QUOTE="Dronason, post: 8438, member: 553"] GPS is not used for altitude, too unreliable. Barometer is mainly used for general altitude control. But when the laser vertical sensor give a value (this depend on the kind of soil, 5-10m) (15-30 feet) , it is also used. If the returned value is bellow 30 cm (1 feet) it turn as a ground proximity alarm. Try to put your hand bellow that range under the Spark (like palm landing) when it is hovering, it will goes up. When you manually land (full stick down), it will stop at that distance and then do an automatic landing. There was a thread were the Spark auto landed just because it's laser sensor was reporting it was near the ground. [/QUOTE]
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Stuck above the clouds/fog