This demonstrated that the ionosphere of the moon was about 700 kilometers ( 430 mi ) above the surface on the day side .
The density ranged from 60,000 electrons per cubic centimeter on the day side , down to 9,000 on the night face .
This demonstrated that the ionosphere of the moon was about 700 kilometers ( 430 mi ) above the surface on the day side , and the density ranged from 60,000 electrons per cubic centimeter on the day side , down to 9,000 on the night face .