The satellite is found in the eastern end of Canyon Camp. GASA is a separate island located to the north. Simply return the satellite to the GASA facility at the top of the GASA island. You can complete 50 deliveries with a gold rank to unlock the UFO, which is the best vehicle in the game.
Here is a video guide with English commentary!
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUISTHMzTXDO...