Atmosphere of Earth they penetrate more deeply. The various layers of Earth's ionosphere, important to HF radio propagation, begin below 100 km and extend beyond 500 km. By comparison, the International Space Station and Space Shuttle typically orbit at 350–400 km, within the F-layer of the ionosphere where they encounter enough atmospheric drag to require reboosts every few months. Depending on solar activity, satellites can experience noticeable atmospheric drag at altitudes as high as 700–800 km. The division of the atmosphere into layers mostly by reference to temperature is discussed above. Temperature decreases with altitude starting at sea level, but variations in this
Radio Waves (Eli Young Band song) Radio Waves (Eli Young Band song) "Radio Waves" is a song recorded by American country music group Eli Young Band. It was released in June 2009 as the third single from the album "Jet Black & Jealous". The song reached number 35 on the "Billboard" Hot Country Songs chart. The song was written by Mike Eli and Blu Sanders. "Radio Waves" is an up-tempo song in which the male narrator is reflecting on a past relationship with regret. The narrator sings the song to former lover over the radio, hoping to reconcile the relationship. The song has garnered favorable critical