Digital satellite navigation and geophysics. A practical guide with GNSS signal simulator and receiver laboratory / Цифровая спутниковая навигация и геофизика. Практическое руководство с имитатором сигналов GNSS и лабораторией приемников

I built my first crystal radio kit when I was 9 years old. I became hooked on radio technology, even at that tender age, and later went on to build other radios as a teenager, including a shortwave receiver froma kit. I learned how radiosworked by building them and tinkering with them. I learned much later on that the famous American physicist, Richard Feynman, also had an interest in radios when he was 11 or 12. He would buy broken radios at rummage sales and try to fix them. That’s the way he learned how they worked. As he says in the first chapter of his book Surely You’re Joking Mr. Feynman!–Adventures of a Curious Character, ‘The sets were simple, the circuits were not complicated . . . It wasn’t hard for me to fix a radio by understanding what was going on inside, noticing that something wasn’t working right, and fixing it.’ As we know, Feynman went on to unravel the nature of quantum mechanics amongst other accomplishments. And, all his life, he took great pleasure in finding things out. <...>