ALOSPALSAR High Res Terrain Corrected Product Issue

Greetings!

I am trying to Calibrate ALOSPALSAR High Res Terrain Corrected Product (which is available on ALASKA SATELLITE FACILITY) in SNAP , It shows following error

SNAP needs certain metadata to process SAR images. I is therefore important to correctly import products with all their metadata.
The RTC products of the ASF are available as GeoTiffs, which don’t contain any meta information and can therefore not be processed by SNAP. Besides that, I think that they are already radiometrically calibrated.

You can easily do that yourself when you download the Level1.1 products.

  1. Calibration (to Beta0)
  2. Terrain Flattening
  3. Range Doppler Terrain Correction

Example for Sentinel-1 data: https://media.asf.alaska.edu/uploads/pdf/current_data_recipe_pdfs/graphprocessingrtcrecipe_v1.7.pdf