Search found 306 matches

by fsteinmetz
Tue Jul 19, 2022 7:20 am
Forum: Support
Topic: custom ancillary folder doesn't work for NASA satellites
Replies: 2
Views: 2686

Re: custom ancillary folder doesn't work for NASA satellites

Dear Guillaume,

To provide a custom directory to NASA ancillary data, you should pass the argument "directory" to the class Ancillary_NASA (Ancillary_NASA(directory=<custom dir>)). Do you confirm this is what you did ? If so, what is the error ?
Cheers,
François
by fsteinmetz
Tue Jun 14, 2022 12:27 pm
Forum: Support
Topic: Output filename assertion error
Replies: 2
Views: 2518

Re: Output filename assertion error

Hi,

No, I think the problem is on the input file : you should provide the path the the granule (ex: S2B_MSIL1C_20200719T100029_N0209_R122_T32TQR_20200719T124000.SAFE/GRANULE/L1C_T32TQR_A017594_20200719T100614)

Cheers,
François
by fsteinmetz
Tue Jun 14, 2022 12:25 pm
Forum: Support
Topic: Polymer cloud cover and land flag
Replies: 1
Views: 2545

Re: Polymer cloud cover and land flag

Hi Tong, The cloud mask in Polymer is determined by a threshold on the reflectance in the NIR band, but by default it is quite relaxed to avoid masking out the sun glint (20%). This way, the semi-transparent clouds are processed by Polymer, and water underneath still being visible. ACOLITE has a str...
by fsteinmetz
Tue May 24, 2022 2:04 pm
Forum: Support
Topic: Strips in Polymer VIIRS Rw image
Replies: 4
Views: 3232

Re: Strips in Polymer VIIRS Rw image

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
by fsteinmetz
Mon May 23, 2022 9:56 am
Forum: Support
Topic: Strips in Polymer VIIRS Rw image
Replies: 4
Views: 3232

Re: Strips in Polymer VIIRS Rw image

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...
by fsteinmetz
Fri May 20, 2022 1:17 pm
Forum: Support
Topic: Error L8-OLI scene
Replies: 1
Views: 2332

Re: Error L8-OLI scene

Dear Muhammad,

I could process a part of this file with Polymer v4.14. Did you use particular processing options ?
Thanks,
Cheers,
François
by fsteinmetz
Fri May 20, 2022 11:07 am
Forum: Support
Topic: Error converting VIIRS L1A to L1C data
Replies: 2
Views: 2560

Re: Error converting VIIRS L1A to L1C data

Dear Mengmeng,

It seems that you are missing the "viirs" part of the SeaDAS install. You can refer to https://seadas.gsfc.nasa.gov/downloads/ to get the instructions for installing it.
Cheers,
François
by fsteinmetz
Fri May 06, 2022 9:17 am
Forum: Support
Topic: Failed to download external oceandata files
Replies: 1
Views: 2526

Re: Failed to download external oceandata files

Hello, The auxiliary data are fixed files downloaded by the command "make auxdata_all". The ancillary files are different, and are downloaded on the fly to get information about wind speed, surface pressure, etc, for the file you want to process. Installing wget through anaconda should work - could ...
by fsteinmetz
Fri May 06, 2022 9:01 am
Forum: Support
Topic: Polymer running error for MSI
Replies: 1
Views: 2645

Re: Polymer running error for MSI

Dear Tong,

Can you confirm that the file auxdata/common/no2_climatology.hdf is present ?
Have you downloaded all auxiliary data with "make auxdata_all" ?
Cheers,
François
by fsteinmetz
Fri May 06, 2022 8:52 am
Forum: Support
Topic: POLYMER ice flagging
Replies: 1
Views: 2341

Re: POLYMER ice flagging

Dear Jonathan, Polymer treats ice pixels the same way it treats clouds - in that regard, partial ice coverage can be corrected by Polymer, and thick ice blocks should be flagged as clouds, based on a simple cloud mask based on pixel reflectance in the NIR and standard deviation over a block of pixel...