search

nansencenter / sea_ice_drift

Sea ice drift from Sentinel-1 SAR imagery using open source feature tracking
GNU General Public License v3.0
41 stars 17 forks source link

Need a help in preparation original Sentinel SAR image for the algorithm #15

Closed hamoun1981 closed 4 years ago

hamoun1981 commented 5 years ago

Hello

I installed the library and run the example without a problem, but when I tried the original SAR images I faced with an error.

"ValueError: Cannot find band {'name': 'sigma0_HV'}! band_number is from 1 to 1"

so I checked the example and original files both and I found some differences in metadata: Original file does not have this line NETCDF_VARNAME=sigma0_HV

One member of the group I am working in it recommended me to use "nansat_geotiffimage". I applied it but I still have the same problem

Test.pdf

thanks in advance for any help you can provide

Best regards, Hamoun

akorosov commented 5 years ago

Hi @hamoun1981 ! How did you prepare these tif files? 

f1 = 'S1D_EW_GRDM_1SDH_20190311T080051.tif'
f2 = 'S1D_EW_GRDM_1SDH_20190311T093915.tif'

You actually don't need any extra preprocessing. The code can take original L1 EW GRDM Sentinel-1 data:

f1='S1A_EW_GRDM_1SDH_20190320T051001_20190320T051049_026417_02F4DD_3D0D.SAFE'
f2='S1A_EW_GRDM_1SDH_20190320T082602_20190320T082712_026419_02F4F4_568B.SAFE'
hamoun1981 commented 5 years ago

Thanks a lot for your help I applied nansat_geotiffimage on Geotiff file which one can find in "measurement" folder of downloaded Sentinel SAR images and formerly I utilized that "TIF" file instead of example input image which I faced with that problem.