F2011WxObsLecturePart2 copy

F2011WxObsLecturePart2 copy - 1 The Grand Tour of Weather...

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1 The Grand Tour of Weather Observations, Part Two: Remote Sensing Using Satellites and Radar You observe atmosphere remotely with your eyes, ears Meteorologists do the same thing, but they use scientific instruments to do it. x REMOTE SENSING (RS) ” = observation without being in contact with what you’re observing. There are two types of remote sensing: ¾ PASSIVE RS: take in what “see” Examples: human eye; weather satellite ¾ ACTIVE RS: send out signal, “see” what comes back Examples: yell, listen for echo; weather radar
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2 WEATHER SATELLITES x “Sees” EM radiation in wide variety of “channels.” Updates every 15-30 minutes, global coverage. Infrared (incl. water vapor) images give 24- hour-a-day coverage, too. x Let’s look at some images now, in different electromagnetic “channels” Vern Suomi (1915-95) VISIBLE: 0.5 microns Pam’s M.S. advisor, INFRARED: about 10-11 microns invented weather WATER VAPOR: around 6.5 microns satellites http://www.ssec.wisc.edu/data/geo.html#goeseast
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F2011WxObsLecturePart2 copy - 1 The Grand Tour of Weather...

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