Distance from earth to gps satellite? Navigation satellites move around Earth at an altitude of about  1,243 miles to 22, 223 miles and at about the same speed of  rotation. These satellites are in what is calle â¦ d Medium-Earth  orbits (MEO).
When aerating your lawn, it is best to aerate on a day where the temperatures are milder and the soil in a moist condition, which will make the aerating process much easier. Aerating wet soil can be a real nuisance due to the fact that the plugs will get stuck in the hollow tines and can further compact you soil.
There is no real determination time for this question. The best way to find out if your lawn needs to be aerated is to do a small test of your soil. A very simple way to make that determination is to take a screwdriver and insert it into the soil. If insertion is fairly easy your soil should be just fine. If insertion is difficult, it is probably time to aerate.