pytroll / pytroll/pyresample

gradient_search comb effect

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@mraspaud is already working on this.

Since Oct 2, 2025.

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Description

hi, great project, love using it - it's saved me so much time!

I'm getting a 'comb' effect using the gradient resampler. I understand this is a prototype product, but it works excellently otherwise. I haven't seen this reported elsewhere, so thought I'd report.

resampling amsr2 l1r from raw h5 to a dense grid (eg from native 5000 to 80m), I get this result

Image

if we zoom in and pull the colour range in to the view we see horizontal combs interpolating between the samples.

Image

amsr = 'GW1AM2_201712190356_220D_L1SGRTBR_2220220', 'GW1AM2_201712190445_220A_L1SGRTBR_2220220'
roi = 324275, -1893016 : 340542, -1881592 (epsg:3031)

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