Data Quality Report for Order ID: 187376
User ID: hux2    Date completed: 2017-08-21
All DQRs
DQR ID Subject Affected Data Streams Data Quality Metric
D120828.8 TWP/KAZR/C1/C3 - General Quality Statement twpkazrspeccmaskgecopolC3.a0 Suspect
D131120.5 TWP/KAZR/C1/C3 - Reprocessing Notice (RID 1118) twpkazrauxC3.a0 Note
 
DQR ID: D120828.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2011-03-12 00:00:00 2014-12-31 23:59:59 Suspect
Subject: TWP/KAZR/C1/C3 - General Quality Statement
Affected Datastreams: twpkazrspeccmaskgecopolC3.a0
Description 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, Kevin Widener, at kevin.widener@pnnl.gov as these issues occur so that they can be investigated and corrected if necessary.
Measurements
  • velocity_bins (Spectral velocity bins)
  • signal_to_noise_ratio (Signal-to-noise ratio)
  • mean_doppler_velocity (Mean Doppler Velocity)
  • spectral_width (Spectral Width)
  • range (Range (center of radar sample volume))
  • reflectivity (Reflectivity)
  • locator_mask (Locator mask for spectra)
  • spectra (Spectra)
 
DQR ID: D131120.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2011-03-12 00:00:00 2014-03-16 23:59:00 Note
2011-01-27 00:00:00 2014-05-03 23:59:00 Note
Subject: TWP/KAZR/C1/C3 - Reprocessing Notice (RID 1118)
Affected Datastreams: twpkazrauxC3.a0
Description See below for details of reprocessing that was completed on 20150626. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- The wrong calibrations were used due to a problem with the software. Mentor discovered the reflectivity between long and short pulse did not agree with each other after analyzing data. Data will be reprocessed.
Measurements
  • cal_constant_ch1_copol (Radar calibration constant, channel 1, copolar)
  • cal_constant_ch2_xpol (Radar calibration constant, channel 2, cross-polar)
  • reflectivity_copol (Reflectivity, copolar)
  • reflectivity_xpol (Reflectivity, cross-polarization)
  • reflectivity_copol (Reflectivity, co-polarization)
  • cal_constant_ch1_xpol (Radar calibration constant, channel 1, cross-polar)
  • reflectivity (Reflectivity)
  • reflectivity_copol (Reflectivity, copolar, corrected for gaseous attenuation)
  • cal_constant_ch2_copol (Radar calibration constant, channel 2, copolar)