What things do not effect the observations of radio telescopes

- - the height of the grass

- - the price of olive oil

- - TV sitcom audience ratings

- - migration of Canada geese

- - the color of my car

- - the weight of a sack of dog food

- - sales of Justin Bieber's latest record

- - or his earliest, for that matter

- - winners of the World Series or the Stupor Bowl

- - findings by the robotic Mars rovers

- - the moon's sidereal rotation period

- - the winner of the Fifth race at Santa Anita

- - the size of the crowd at the president's inauguration

- - proven oil reserves in Qatar

- - all the AM, FM, TV, fire, police, microwave, wifi, garage-door openers, cellphones, toy walkie-talkies, and ham radio operators in the world, operating legally, outside of designated radio astronomy quiet zones

"Radio waves are not blocked by clouds and are unaffected by the Earth's atmosphere, thus radio telescopes can receive signals during cloud cover. The exception being strong winds which affect the large dish and thunderstorms due to interference"