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[Mission Director] Ok, let's go through the experiements here. This will be a go for taxi.

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DMS: Go. Gravimeter: Go.

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MCORDS: Go. ATM: Go.

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Ku-Band, Snow: Go.

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LVIS: Go. Mission Science: Good to go.

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Ok safety techs, last check. [Carl Leuschen] Today we're doing the under flights

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of the CryoSat radar altimeter and the ICESat laser altimeter.

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ICESat is a satellite laser altimeter and CryoSat is a satellite radar altimeter.

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And these two instruments are used to measure topography of land and

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snow and the ocean surface. Some of the stuff we do is calibration and

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validation of the data products they get. Being much closer to the surface

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in an aircraft, we can get more detailed measurements in finer resolution

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so we can use these measurements to help make sure that the measurements

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that they're receiving from the satellite are calibrated and they're also measuring what

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they want to. With the radar we have, you can actually look at

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or distinguish the surface layer and internal layers and help to answer these questions.

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What we hope to see is

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good agreement between the measurements. It will take a while to

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get the measurements back from the satellite system and then also process

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the data and go through the calibration routines and then do the comparison between