Pre-processing of Sentinel 1A

Please tell me right series to do pre-process in sentinel 1A data.


Can you give answer the the following questions?

  • Is it SENTINEL-1 complex data (SLC)?
  • Is it Ground Range Detected data?

What are you trying to achieve with these data?


this is the details of the product …i think it is level -1 product (SLC)

Looking at the name of your product, its Ground Range detected (you can see the abbreviation GRDH). I do not know what you are trying to do, but the fundamental pre-processing steps for SENTINEL-1 data can be summarized as follows:

  • Thermal noise removal (especially in areas of low backscatter intensity)
  • Speckle noise suppression
  • Image calibration
  • terrain correction

Also, incidence angle normalization for SENTINEL-1 wide swath data is required but it is not implemented in SNAP. You can do this step yourself

By the way, if you do a simple search on this forum, you will find a few posts about SENTINEL-1 data pre-processing

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thank you so much sir

Hi Johngan,

Do you have any idea why Sentinel-1A GRD images have black margin? the low backscattered signal?


The black lines on either side of the GRD SENNTINEL-1 image is the border noise. This is due to the processing of raw data into L1 product leading to artifacts at the image borders.
For more details, please see the article below.

Sentinel-1-masking-no-value-pixels-grd-products-note.pdf (743.4 KB)

Thank you very much for your reply.