Help with Converting Geoid File (.dat) to .GGF Format for GNSS Device

Hi everyone,

I’m new to GNSS and have been exploring my new device. I recently downloaded the Geoid model for my country from a government website, and it’s provided in a .dat format. However, my GNSS device requires the geoid file in .GGF format for proper height adjustments.

Does anyone know how I can convert the .dat geoid file into .GGF format?
Are there specific software tools or processes for this conversion?

Any guidance or step-by-step instructions would be greatly appreciated. Thank you!