Quality flags

[kingjml]

Where is the quality flag stored in the radar data?

Need to be able to access this to decide if we process or not.

[kingjml]

For the AWI data its apparent that flagging for the flight attitude are needed. When the plane goes up or down for calibration of the EM-bird the quality of the snow radar will be questionable.

[kingjml]

Need a check that the A-S interface is above the S-I.

[kingjml]

All NaN traces have been found in some of the AWI data. Flagging is required to mask in numpy and scipy functions.

[kingjml]

Priority item for this week. Working on it actively in josh_dev. Current structure provides Boolean flag fields for aircraft dynamics and data quality. Basic functions for SNR analysis implemented.

[kingjml]

QA flags for flight dynamics have been merged to master.

#36