What the GPS saw.

In preparation for the arrival of the M8T, I did a 2m square live flight based on a file controlled flight plan.

Here’s what the ground facing video saw:

What the video saw.

What the video saw.

What the GPS saw was absolutely no change; nada, nix, nichts, null, yet the 36 line results definitely come from the same flight based on the 36 second flight timed by the IMU clock:

latitude, longitude, altitude, satellites, epx, epy
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000
51.000943, -1.000837, 84.400000, 10, 2.323000, 2.514000

So next I did roughly the same, but with a passive flight i.e. with me carrying her around the 2m square course.  Here again is what the GPS saw:

latitude, longitude, altitude, satellites, epx, epy
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000907, -1.000748, 90.500000, 10, 2.254000, 2.500000
51.000913, -1.000755, 85.300000, 10, 2.254000, 2.500000
51.000910, -1.000750, 85.400000, 10, 2.254000, 2.500000
51.000905, -1.000745, 85.500000, 10, 2.254000, 2.500000
51.000902, -1.000738, 85.400000, 10, 2.254000, 2.500000
51.000900, -1.000735, 85.300000, 10, 2.254000, 2.500000
51.000900, -1.000730, 85.200000, 10, 2.254000, 2.500000
51.000903, -1.000723, 85.200000, 10, 2.254000, 2.500000
51.000907, -1.000717, 85.300000, 10, 2.254000, 2.500000
51.000912, -1.000712, 85.200000, 10, 2.254000, 2.500000
51.000913, -1.000707, 85.200000, 10, 2.254000, 2.500000
51.000918, -1.000703, 85.000000, 10, 2.254000, 2.500000
51.000922, -1.000708, 85.100000, 10, 2.254000, 2.500000
51.000925, -1.000715, 85.400000, 10, 2.254000, 2.500000
51.000930, -1.000720, 85.600000, 10, 2.254000, 2.500000
51.000933, -1.000727, 85.500000, 10, 2.254000, 2.500000
51.000932, -1.000737, 85.600000, 10, 2.254000, 2.500000
51.000928, -1.000745, 85.700000, 10, 2.254000, 2.500000
51.000923, -1.000753, 86.100000, 10, 2.254000, 2.500000
51.000920, -1.000760, 85.900000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.500000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.200000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.000000, 10, 2.254000, 2.500000
51.000917, -1.000763, 84.900000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.200000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.300000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.200000, 10, 2.254000, 2.500000
51.000917, -1.000763, 85.000000, 10, 2.254000, 2.500000
51.000917, -1.000765, 85.000000, 10, 2.254000, 2.500000

And a graphical version too this time as there are many different GPS readings:

Trying again

Trying again

Frankly, this is the best I’ve ever seen by a very long way in terms of consistency between each reading and resolution of each reading very much less than a meter.  This strongly suggests the problem is with electrical noise from the motors; if I could move the GPS receiver far away from the motors, the problem would be fixed.  On the plus side, the M8T does include EMI shielding, so I’m hoping this will work.

M8T EMI shielding

M8T EMI shielding

It’ll be arriving later this week.  Fingers crossed!

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