MIT Technology Review explores how train-mounted satellite dishes have traditionally been too bulky for many tunnels (particularly in the UK). In response, scientists have developed a dome-shaped plastic lens that's less than half as high as a typical satellite dish. The new 30 centimeters high dome can also track multiple satellites at once, making it more useful than traditional dishes.Interestingly, the article waits until the end to note that the new system has yet to be tested on a moving vehicle. The new dish's developer, when asked why he chose satellite over 3G, notes that inconsistencies in 3G deployment made satellite a better option.