[gdal-dev] Noise at the top of NOAA19 (L1B) image

[Francisco Vicent]

I understand.

Thanks for your help!

El 23/8/2024 a las 12:22, Andrew Brooks escribió:
> Yes, the raw data is likely corrupt. When you see the "image without 
> noise" pygac is probably automatically cropping off the noise for you.
>
> On Wed, 21 Aug 2024 at 21:10, Francisco Vicent 
> <franciscovicent at outlook.com> wrote:
>
>     Do you suggest the image itself might be corrupt?
>
>     I can see the top of the image without noise if I extract the
>     individual bands using pygac and then I create a TCI with GDAL:
>
>     https://i.imgur.com/OspvQi7.png
>
>     El 21/8/2024 a las 10:49, Andrew Brooks escribió:
>>     That's completely normal for data which has been received from
>>     satellites that do not have on-board error detection/correction
>>     such as NOAA-n (n<20)
>>
>>     On Tue, 20 Aug 2024 at 22:05, Francisco Vicent via gdal-dev
>>     <gdal-dev at lists.osgeo.org> wrote:
>>
>>         Hello there, GDAL community!
>>
>>         I'm experiencing some issues while warping a NOAA 19 image.
>>         I'm running
>>         a simple:
>>
>>         gdalwarp NSS.LHRR.NP.D16020.S1834.E1846.B3581920.WI warped.tif
>>
>>         When I display the result in QGIS, it seems that the image is
>>         a little
>>         cropped and has some noise at the top:
>>
>>         https://imgur.com/a/gZW6Sya
>>
>>         I've also tried with NOAA 14 and 16 datasets and they look as
>>         expected,
>>         so I guess that the NOAA-19 format might not be fully supported.
>>
>>         Anyway, I would like to hear from you if there's something I
>>         am missing,
>>         before filing an issue or attempting a fix.
>>
>>         Thanks in advance.
>>
>>         Regards,
>>         Francisco
>>
>>
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>>
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