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

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

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

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