AWR/XSACR/M1 - Low copol_correlation_coeff at Times

The VPT copol_correlation_coeff (RhoHv) is unusually low at times.  It only last the 
duration of the 15 minute scan normally and will be OK the next scan.  The cause of this is 
currently unknown and the data may actually be OK.  However, use with caution.

• sky_noise_copol
• mean_doppler_velocity
• differential_reflectivity
• copol_correlation_coeff
• sky_power_copol
• reflectivity
• differential_phase
• snr
• sky_noise_xpol
• sky_power_xpol
• spectral_width