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

[Andrew Brooks]

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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