Before we can deploy to Greenland the science instruments installed on the NASA P-3 aircraft need to be calibrated. During a radar calibration flight a series of pitch and roll maneuvers is precisely executed for 4 hours requiring maximum concentration of the instrument teams and flight crew. Here you can see the radar team from the Center of Remote Sensing of Ice Sheets (CReSIS) at the University of Kansas fine tuning the antenna pattern and the 15 channels of the radar depth sounder during the flight. At 20,000 feet above the ocean it is cold inside the P-3.

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