OLI/KAZR/M1 - General Quality Statement

The KAZR continues to undergo evaluation by the radar instrument mentors, ProSensing, VAP 
developers, DQ Office, site scientists, users, etc.  As more in-depth analysis and 
calibration studies take place, we anticipate that new insights will be gained to increase the 
quality of the data and decrease the uncertainty of the measurements.  This is a 
continuous improvement process and issues will be addressed as they are discovered.

Calibration is very important.  With the addition of Ka-SACRs adjacent to the KAZRs, this 
will give us an unprecedented method of doing calibration comparisons.  The Ka-SACR will 
be able to use an external calibration target to include those components that are not 
calibrated by internal circuits.  We will not be able to point the KAZR at a calibration 
target but by comparing radar returns to the Ka-SACR, we will be able to achieve a higher 
degree of calibration than we ever could with the KAZR operating standalone as its 
predecessor, the MMCR, did.

As issues are discovered, attempts will be made to correct data that is currently in the
Archive.  However, retrospective correction of errors due calibration, signal processing,
component degradation and software bugs may not be possible for many of the data files.

This open-ended DQR is an advisory that some aspects of the data quality are not yet 
known.  It is also a request for users that find issues or questions with the data to contact 
the ARM Radar Engineering & Operations Group Manager, as these issues occur so that they 
can be investigated and corrected if necessary.

Contact information can be found on http://www.arm.gov/instruments/kazr

Known Issues:

There are substantial clutter issues caused by the surrounding pipelines and 
infrastructure.  Most notable in the PPI and RHI data, this is also visible in the VPT data as a very 
steady feature around 2 km.

• Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
• Linear depolarization ratio(linear_depolarization_ratio)
• Signal-to-noise ratio, copolar(snr_copol)
• Copol to cross-polar correlation coefficient (also known as rhocx)(co_to_crosspol_correlation_coeff)
• reflectivity(reflectivity)
• Signal-to-noise ratio, cross-polar(snr_xpol)
• Mean doppler velocity(mean_doppler_velocity)

• reflectivity(reflectivity)
• Mean doppler velocity(mean_doppler_velocity)
• Copol to cross-polar correlation coefficient (also known as rhocx)(co_to_crosspol_correlation_coeff)
• Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
• Signal-to-noise ratio, copolar(snr_copol)
• Signal-to-noise ratio, cross-polar(snr_xpol)
• Linear depolarization ratio(linear_depolarization_ratio)

• Signal-to-noise ratio, cross-polar(snr_xpol)
• Linear depolarization ratio(linear_depolarization_ratio)
• Mean doppler velocity(mean_doppler_velocity)
• reflectivity(reflectivity)
• Copol to cross-polar correlation coefficient (also known as rhocx)(co_to_crosspol_correlation_coeff)
• Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
• Signal-to-noise ratio, copolar(snr_copol)

• Linear depolarization ratio(linear_depolarization_ratio)
• Mean doppler velocity(mean_doppler_velocity)
• Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
• Signal-to-noise ratio, cross-polar(snr_xpol)
• Signal-to-noise ratio, copolar(snr_copol)
• Copol to cross-polar correlation coefficient (also known as rhocx)(co_to_crosspol_correlation_coeff)
• reflectivity(reflectivity)