Please provide your email address to receive an email when new articles are posted on . Since 2004, I have been the medical director and sole surgeon of San Antonio Eye Specialists. San Antonio is the ...

PEOPLE engaged in radio tracking of space vehicles are well aware of the fact that the Earth's atmosphere may cause serious refractive errors in the elevation angle determination. It is also generally ...

SINCE atmospheric refraction plays an important part in the bending of ultra–short radio waves round the surface of the earth, an adequate study of the propagation of these waves requires a knowledge ...