Weather report
Now global positioning system (GPS) satellites can also give you a weather report for all you sea-faring people. This could provide a low- cost alternative to weather buoys and expensive radar satellites that are conventionally used for predict- ing bad weather. GPS signals from the ground are usually consid- ered an annoyance, since they mask genuine signals from the satellites. But researchers at the US National Aeronautics and Space Administration found out that if they modified the GPS receiver, it could measure the height of waves, wind speed and direction (New Scientist, Vol 160, No 2159).
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