Planet RGB images, much difference between resolutions, same mission

Bugs & Features
1

Hi, I was writing this post to ask if when requesting images from the planet source, these images have a very different resolution for some reason, downloaded in the same way.

This is the script I use (It’s the same for the two images I attached)

            //VERSION=3
            function setup() {
                return {
                    input: [{ "bands": ["B1", "B2", "B3", "dataMask"]}],
                    output: { bands: 4}
                };
            }
            var f = 10000;
            function evaluatePixel(sample) {
                return [sample.B3/3000, sample.B2/3000, sample.B1/3000, sample.dataMask];
            }

And I attach the resulting images.

300a0024-4f60-4366-88e6-7de8765199ff_RGB
300a0024-4f60-4366-88e6-7de8765199ff_RGB1910×2048 562 KB

1aa8450b-0a6b-4cbf-850f-605a02776f69_RGB
1aa8450b-0a6b-4cbf-850f-605a02776f69_RGB1910×2048 341 KB

2

Hi,
there are many factors, that can impact this:

  • PlanetScope doves are flying at different elevations - closer they are to the ground, sharper the image (if you check specs) you will see that the original resolution varies.
  • there might be band mis-alignment
  • atmospheric effects (haze) might impact data reprocessing
  • there are three sensors actually combined under PlanetScope - PS2, PS2.SD and PSB.SD, and there might be quality difference (check Planet documentation)

Best,
Grega