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[Noobie Question] Spark - really that unreliable?
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<blockquote data-quote="RustyStainless" data-source="post: 17301" data-attributes="member: 2727"><p>The first part is correct, but the second</p><p></p><p></p><p><em>"I'm assuming because I had been driving with the Spark and did NOT calibrate the compass before flying, the GPS system failed."</em></p><p>How can you just assume this? What evidence do you have to support this notion. How many flights had you previously completed before this event?</p><p>DJI's assessment was: "<em>As for the reason <strong>the Spark lost GPS</strong> signal was the fact that ...</em>."</p><p>Their assessment was that "the Spark lost GPS" for reasons that don't seem believable from your (Rick's) assessment of the surrounding environment. (Since they acknowledge that they can look-up the last known GPS coordinates, I don't know why they couldn't just look it up on Google Maps)</p><p>That doesn't change the fact that the "Spark lost GPS".</p><p>They did not mention the compass. They would have the diagnostic ability to pinpoint an un-calibrated compass and they would have pinned it on you easily.</p><p></p><p>And regarding the compass-GPS interaction, you mentioned (whilst acknowledging your sketchy understanding):</p><p>"<em>From what I understand, it's not so much that you're losing GPS as it is that the GPS system needs a good compass to work. The GPS only registers a POINT on the map. The compass is what the Spark uses to update it's location by knowing what direction it's moving. So, apparently, if the GPS system thinks it's going north, but the bad compass is heading west, all hell breaks loose.</em>"</p><p>Not correct. The Compass is merely telling you which direction the front of the craft is pointed. This is helpful if your were trying to fly in a tight space and needed to be sure which way the craft would go when you push the joy stick forward (or back, left, right). It can help you "before" you make an action.</p><p>Yes the GPS plots points at different time intervals to calculate speed and direction traveled (past tense, after the travel has occurred). With a Quadcopter, that travel may have happened going forward, in reverse or side ways.</p><p>There is an illusion that they are working together, but they are not. They might come in the same package, but they are not dependent on each other.</p></blockquote><p></p>
[QUOTE="RustyStainless, post: 17301, member: 2727"] The first part is correct, but the second [I]"I'm assuming because I had been driving with the Spark and did NOT calibrate the compass before flying, the GPS system failed."[/I] How can you just assume this? What evidence do you have to support this notion. How many flights had you previously completed before this event? DJI's assessment was: "[I]As for the reason [B]the Spark lost GPS[/B] signal was the fact that ...[/I]." Their assessment was that "the Spark lost GPS" for reasons that don't seem believable from your (Rick's) assessment of the surrounding environment. (Since they acknowledge that they can look-up the last known GPS coordinates, I don't know why they couldn't just look it up on Google Maps) That doesn't change the fact that the "Spark lost GPS". They did not mention the compass. They would have the diagnostic ability to pinpoint an un-calibrated compass and they would have pinned it on you easily. And regarding the compass-GPS interaction, you mentioned (whilst acknowledging your sketchy understanding): "[I]From what I understand, it's not so much that you're losing GPS as it is that the GPS system needs a good compass to work. The GPS only registers a POINT on the map. The compass is what the Spark uses to update it's location by knowing what direction it's moving. So, apparently, if the GPS system thinks it's going north, but the bad compass is heading west, all hell breaks loose.[/I]" Not correct. The Compass is merely telling you which direction the front of the craft is pointed. This is helpful if your were trying to fly in a tight space and needed to be sure which way the craft would go when you push the joy stick forward (or back, left, right). It can help you "before" you make an action. Yes the GPS plots points at different time intervals to calculate speed and direction traveled (past tense, after the travel has occurred). With a Quadcopter, that travel may have happened going forward, in reverse or side ways. There is an illusion that they are working together, but they are not. They might come in the same package, but they are not dependent on each other. [/QUOTE]
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[Noobie Question] Spark - really that unreliable?