SGP/KAZR/C1 - Background shifts

The cross-pol/co-pol plot showed a pulse type issue, as if radar was switching modes, or 
there were intermittent voltage differences.  It is believed that the issue was due to the 
TWTA waveguide pressurization system.  However, the issue self-rectified before a cause 
could be definitively identified.

Don't use cross-polarization reflectivity or LDR during this period.

• Spectral width, cross-polarization(spectral_width_xpol)
• Signal to noise ratio, cross-polarization(signal_to_noise_ratio_xpol)
• Reflectivity, cross-polar(reflectivity_xpol)
• Radar calibration constant, cross-polar(cal_constant_xpol)
• Mean doppler velocity, cross-polar(mean_doppler_velocity_xpol)

• Spectral width, cross-polarization(spectral_width_xpol)
• Signal to noise ratio, cross-polarization(signal_to_noise_ratio_xpol)
• Reflectivity, cross-polar(reflectivity_xpol)
• Radar calibration constant, cross-polar(cal_constant_xpol)
• Mean doppler velocity, cross-polar(mean_doppler_velocity_xpol)

• Radar calibration constant, cross-polar(cal_constant_xpol)
• Signal to noise ratio, cross-polarization(signal_to_noise_ratio_xpol)
• Spectral width, cross-polarization(spectral_width_xpol)
• Mean doppler velocity, cross-polar(mean_doppler_velocity_xpol)
• Reflectivity, cross-polar(reflectivity_xpol)