Diagonal patterns in zonation

Does anyone have an idea what could be causing these diagonal linear patterns? They aren’t following the flight path or planting path, or pre-season tillage paths. I can’t figure out if it’s an algorithm issue or something physical? Thanks.

I coudn’t upload all at once so here is another

Here is the flight plan for field 1

Did you use a radiometric calibration panel?

Thanks for your reply. I apologize for not seeing this sooner. Yes, this was flown using the calibration panel. It’s a strange phenomenon to be sure.

What overlap do you fly with? And what direction was the sun shining in these projects?

I often see patterns like these where there has been aerial application of seed or fertilizer by crop dusters. I see it most in rice, but would think it could be applicable to other crops as well. Not sure if that is what’s going on in your case, but just wanted to suggest it in case. What crop have you imaged here?

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It’s 8 week old cotton and it was captured with a sidelap of 60% and an overlap of 70%. They did have an aerial application applied the day before. Not sure what direction they flew though I suspect it was north and south simply because there are fewer obstructions in those directions.

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Hey Ryan.

If you have a valide PIX4Dfields license you can submit a ticket here, https://support.pix4d.com/hc/en-us/requests/new so se can investigate.