Geography 2090A/B Lecture 7: Lecture 7 - Space in our lives.docx
1 Mar 2014
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Communication: most trans oceanic communication is through underwater cables, but satellites carry a lot as well, cables are expensive and difficult to build, just like satellites, but they are also vulnerable to accidental or deliberate damage, also, cables are point to point routes, working really well for large volumes of data between major cities, but a satellite can receive from or broadcast anywhere, communications are not just phone calls internet traffic also uses satellites as well as cables. Tv news is full of video from around the world even live communications from video equipped telephones have been used on tv news: businesses also transmit huge amounts of data think about using a credit card in another country, so often when you use or watch any of these services you are probably linking through space, at least for part of the process, the global economy and information culture is deeply entwined with space.
