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My name is Rachael Kroodsma, I'm with

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the NASA Goddard Space Flight Center and I am instrument scientist for

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CoSMIR. CoSMIR has very similar 

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frequencies to what GMI, the microwave radiometer

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on GPM has. And so by flying CoSMIR on

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the DC-8 and especially doing underflights with GPM

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passes over us, we'll be able to relate

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the measurements we see from CoSMIR with GMI, and

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by that way we can validate the measurements. What a radiometer

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does is that it measures the radiation that's naturally emitted from

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the Earth. In this case we're measuring the rain and snow, so

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there's radiation that's naturally emitted from the rain and the snow in the microwave

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spectrum, and so this is a microwave radiometer and it's measuring that

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radiation. My expertise is with microwave radiometer calibration.

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And so I do a lot of data analysis,

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checking out calibration of microwave radiometers.

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[laughs] I just think it's pretty cool to be

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part of the instruments and to be out in the field and just see

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how everything works and how it all comes 

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together and be a part of that.
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