Strips in Polymer VIIRS Rw image

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Mengmeng
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Joined: Fri Mar 19, 2021 12:10 am
company / institution: Taishan University
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Strips in Polymer VIIRS Rw image

Post by Mengmeng »

Dear François,

After I processed VIIRS L1C data by Polymer, the Rw images included many stripes. Take Rw551 for example. Then I reprojected Rw551 image using seadas, however, the reprojected image included strips too.

Do you know what caused the strips and how to deal with them?

Thank you.
Kind regards,
Mengmeng.
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fsteinmetz
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Re: Strips in Polymer VIIRS Rw image

Post by fsteinmetz »

Dear Mengmeng,

Indeed, this is a particularity of the VIIRS sensor. There is no data at level1 for these pixels. This is due to the fact that pixels at the edge of the swath cover a larger area at ground, so some lines of pixels are spared. If you reproject to a similar spatial resolution, there are gaps as you see on your reprojected image. You could reproject to a coarser spatial resolution, so that the gaps would be filled. Or see in the reprojection software if there is any options to fill the gaps.
Cheers,
François
Mengmeng
Posts: 38
Joined: Fri Mar 19, 2021 12:10 am
company / institution: Taishan University
Location: Taian, Shandong, China

Re: Strips in Polymer VIIRS Rw image

Post by Mengmeng »

Dear François,

Thank you for your reply. I got it.

In addition, I checked the corresponding VIIRS L2 data which included stripes too. But after I reprojected the VIIRS L2 data, the strips disappeared. So the reprojection method that I used was able to fix the strips in the L2 data. But I wonder why it could not fix the strips in the polymer results?

Thank you.
Kind regards,
Mengmeng.
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fsteinmetz
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Re: Strips in Polymer VIIRS Rw image

Post by fsteinmetz »

I couldn't say, sorry. It seems that the reprojection software handles the VIIRS standard L2 and VIIRS Polymer L2 differently, but this question goes back to the reprojection software.
Cheers,
François
Mengmeng
Posts: 38
Joined: Fri Mar 19, 2021 12:10 am
company / institution: Taishan University
Location: Taian, Shandong, China

Re: Strips in Polymer VIIRS Rw image

Post by Mengmeng »

Dear François,

Thank you for your reply. I got it.

Kind regards,
Mengmeng.
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