What should the pixel resolution of ALOS-2 PALSAR-2 radiometric terrain corrected data?

In Range Doppler Terrain correction what resolution should be set for RTC of ALOS-2 PALSAR-2 data?

Use default pixel spacing. If the processing time is too long, you can increase the pixel spacing

Can I reduce the pixel spacing from the default (7.25m) to 5m?

you can enter any value, but increasing the resolution below the suggested one will not produce results of better quality. It will simply resample the result to this resolution, 5 m in your case.

How to know the suggested value?

it’s the one that SNAP automatically enters in the field when you select an input product for the Terrain Correction. It depends on the sensor, the pre-processing steps and the azimuth and range resolution of the product.

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