What is "convert to dB"?

I want to work on forest biomass. I’m doing Sentinel 1 image processing, but I don’t know what “convert to dB” is.

See: SAR tutorial and this Introductory article on decibels. Although the article is focused on sound, the same reasonaing applies to SAR.

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please also have a look here:

Many great explanations are also given in the SAR Handbook: Comprehensive Methodologies for Forest Monitoring and Biomass Estimation which might be interesting for your field of application as well.

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Thank you.

Thank you. <3

I wonder what is the difference between “Linear to dB” and “Convert band to db” ?
Thank you!