Bands in Sentinel 1 Level 1 (GRD, RAW and SLC) products - basic information


you are the scientist :wink:

If you want to use the rasters from SNAP in a GIS you can simply open the .img files in the data folder of the BEAM-DIMAP format. I suggest this because conversion to GeoTiff has some negative aspects:

  • increased file size
  • basically a duplicate of the img file
  • unnecessary processing time
  • loss of metadata information
  • conversion issues regarding data type (compression, range of values…)


I am not scientist, just s/w engineering!!!
Anyway, we developed many analysis with IDL s/w read the geotiff format.
We do not have GIS.


alright :slight_smile:

Just be aware of the mentioned error sources, especially the data type.


I have zone question,
If product is between 2 zones, which zone you will use for
creating the xml using gpt command line? where exactly the parameters to define the zone from GRD or SLC products?


you define the UTM zone in the projection step, usually in Range Doppler Terrain correction.
Generally you take the zone with the larger coverage in your scene.


Yes that is work perfect.
I build the xml not using the snap. where I get information to get zone?


I would first build a graph in SNAP then export it as an XML. Then you see how the parameters are compoed.


Do all the processing in BEAM-DIMAP and export to Geotiff in a separate step only after the processing is done. Not doing this can cause strange problems.


How to processing data eliminate the bad data on the both side/top/bottom?
I did by using subset, but that is manual, I would like to automate.


Hi !
Out of all the available bands (real (i) and imaginary (q) parts and a virtual intensity) and subswaths(IW1,IW2,IW3) in level-1 SLC which one should i use for calibration in SNAP for getting backscatter data and can you tell step by step process for getting backscatter data .


Please have a look here: