Difference between Air-to-ground and Air-to-surface

What is the difference between Air-to-ground and Air-to-surface?

Air-to-ground as an adjective is fired from an aircraft at a target on the ground while Air-to-surface as an adjective is fired from an aircraft at a target on land or water

We hope you now know whether to use Air-to-ground or Air-to-surface in your sentence.