Cellphone antennas pinpoint the rain

日期:2019-03-02 06:18:01 作者:竹粱 阅读:

THE “not-in-my-back-yard” brigade will take some convincing, but there may be an upside to having cellphone antennas dotted around the landscape: they could give weather forecasters a cheap and accurate measure of rainfall. Water absorbs microwave energy, so rain interferes with the radio signals sent between cellphone base stations. To maintain the network’s signal strength, these fluctuations are monitored continually. Hagit Messer and his team at Tel Aviv University in Israel correlated signal strengths with rainfall measurements taken in the same locations using two conventional techniques: