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GPS weak
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<blockquote data-quote="Andre Levite" data-source="post: 97086" data-attributes="member: 10850"><p>The number of satellites shown by the DJI Go app refers only to the <em>quantity</em> of satellites seen. It’s actually more important to know the <em>quality</em> of the signals but that info isn’t displayed. The Spark needs 3 signal to identify a point over the ground and a fourth to determine altitude. Depending on their position in the sky some signals may be rejected if too weak. The drone is always choosing “the best” 4 signals so it’s beneficial to have more to choose from. Additionally the relative position of the 4 drones is critical to achieve accuracy. If they are closer together the <em>dilution of precision</em> (DOP) is greater and the drone is less sure of its location as well as the Home Point.</p><p></p><p>DJI choose 10-11 signals to add a measure of redundancy to the minimum requirement. It would be even safer if they required more but doing so could take excessive time to lock a Home Point or leave pilots grounded.</p></blockquote><p></p>
[QUOTE="Andre Levite, post: 97086, member: 10850"] The number of satellites shown by the DJI Go app refers only to the [I]quantity[/I] of satellites seen. It’s actually more important to know the [I]quality[/I] of the signals but that info isn’t displayed. The Spark needs 3 signal to identify a point over the ground and a fourth to determine altitude. Depending on their position in the sky some signals may be rejected if too weak. The drone is always choosing “the best” 4 signals so it’s beneficial to have more to choose from. Additionally the relative position of the 4 drones is critical to achieve accuracy. If they are closer together the [I]dilution of precision[/I] (DOP) is greater and the drone is less sure of its location as well as the Home Point. DJI choose 10-11 signals to add a measure of redundancy to the minimum requirement. It would be even safer if they required more but doing so could take excessive time to lock a Home Point or leave pilots grounded. [/QUOTE]
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GPS weak