SGP/XSAPR/I4 - Data Quality Impacted

The XSAPR came back up for a short period of time. Radar not properly calibrated and 
suffered from other problems noted below.
   
Differential reflectivity values all greater than 4 dB Correlation Coefficient values and 
all below acceptable levels (most below 0.8).

PhiDp values noisy and do not appear to increase with range Specific differential 
reflectivity is incorrectly calculated. Elevated background noise in the reflectivity.

Use data with Caution

• reflectivity(reflectivity)
• Attenuation corrected differential reflectivity(diff_reflectivity_corr)
• Signal quality index(sig_qual_index)
• Unfiltered reflectivity(reflectivity_unf)
• Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)
• Attenuation corrected reflectivity(reflectivity_corr)
• Differential reflectivity, clutter filtered(diff_reflectivity)
• Doppler spectral width, clutter filtered(doppler_spectral_width)
• Mean doppler velocity(mean_doppler_velocity)
• Differential propagation phase shift(dp_phase_shift)
• Specific differential phase(diff_phase)

• null(Raw data stream - unknown modes)

• Unfiltered reflectivity(reflectivity_unf)
• Attenuation corrected differential reflectivity(diff_reflectivity_corr)
• Differential reflectivity, clutter filtered(diff_reflectivity)
• Signal quality index(sig_qual_index)
• Mean doppler velocity(mean_doppler_velocity)
• Attenuation corrected reflectivity(reflectivity_corr)
• reflectivity(reflectivity)
• Doppler spectral width, clutter filtered(doppler_spectral_width)
• Specific differential phase(diff_phase)
• Differential propagation phase shift(dp_phase_shift)
• Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)

• reflectivity(reflectivity)
• Attenuation corrected differential reflectivity(diff_reflectivity_corr)
• Differential propagation phase shift(dp_phase_shift)
• Differential reflectivity, clutter filtered(diff_reflectivity)
• Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)
• Signal quality index(sig_qual_index)
• Unfiltered reflectivity(reflectivity_unf)
• Specific differential phase(diff_phase)
• Attenuation corrected reflectivity(reflectivity_corr)
• Doppler spectral width, clutter filtered(doppler_spectral_width)
• Mean doppler velocity(mean_doppler_velocity)

• Differential reflectivity, clutter filtered(diff_reflectivity)
• Attenuation corrected reflectivity(reflectivity_corr)
• Unfiltered reflectivity(reflectivity_unf)
• Signal quality index(sig_qual_index)
• reflectivity(reflectivity)
• Specific differential phase(diff_phase)
• Mean doppler velocity(mean_doppler_velocity)
• Differential propagation phase shift(dp_phase_shift)
• Attenuation corrected differential reflectivity(diff_reflectivity_corr)
• Doppler spectral width, clutter filtered(doppler_spectral_width)
• Lag-0 co-polar correlation coefficient, clutter filtered(copol_coeff)