kazr > Ka ARM Zenith RadarInstrument Type(s) > Baseline • Evaluation • Guest

The Ka-band ARM Zenith Radar (KAZR) remotely probes the extent and composition of clouds at millimeter wavelengths. The KAZR is a zenith-pointing Doppler radar that operates at a frequency of approximately 35 GHz. The main purpose of this radar is to determine the first three Doppler moments (reflectivity, vertical velocity, and spectral width) at a range resolution of approximately 30 meters from near-ground to nearly 20 kilometers in altitude.

The KAZR replaces the millimeter-wavelength cloud radar (MMCR) and uses a new digital receiver that provides higher spatial and temporal resolution than the MMCR. In addition, spectral artifacts in the data are significantly reduced in the KAZR, allowing researchers to study cloud dynamics much more closely than with the MMCR.

KAZR data from the 2018–2019 Cloud, Aerosol, and Complex Terrain Interactions (CACTI) field campaign in Argentina are now available as b1-level products. Building on the original CACTI operational data, the b1-level products feature improved data quality resulting from extensive analyses and corrections. The data are cross-calibrated to a common point, datastreams are corrected for operational issues that occurred during the campaign, and several data quality masks and basic derived products are incorporated. For more information, read the CACTI radar b1-level processing report.



  • Fixed
  • AMF1
  • AMF2
  • AMF3


Ilotoviz E, V Ghate, and S Raveh‐Rubin. 2021. "The impact of slantwise descending dry intrusions on the marine boundary layer and air‐sea interface over the ARM Eastern North Atlantic site." Journal of Geophysical Research: Atmospheres, , e2020JD033879, 10.1029/2020JD033879. ONLINE.


Lamer K, P Kollias, A Battaglia, and S Preval. 2020. Ground-based radars insight into warm marine boundary layer clouds for shaping future spaceborne radar missions. In IEEE Radar Conference (RadarConf2020), pp. 1-4. Piscataway, NJ: IEEE.

Cooper KB, RM Beauchamp, RJ Roy, L Millan, MD Lebsock, and RR Monje. 2020. Cloud Dynamics Revealed by a G-band Humidity-Sounding Differential Absorption Radar. In IEEE Radar Conference (RadarConf20), pp. 1-5. Piscataway, NJ: IEEE.

ZHU Z, P Kollias, F Yang, and E Luke. 2020. "On the estimation of in‐cloud vertical air motion using radar Doppler spectra." Geophysical Research Letters, 48(1), e2020GL090682, 10.1029/2020GL090682.

Wang Y, X Zheng, X Dong, B Xi, P Wu, T Logan, and Y Yung. 2020. "Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic." Atmospheric Chemistry and Physics, 20(23), 10.5194/acp-20-14741-2020.

Ghate V, M Cadeddu, and R Wood. 2020. "Drizzle, Turbulence, and Density Currents Below Post Cold Frontal Open Cellular Marine Stratocumulus Clouds." Journal of Geophysical Research: Atmospheres, 125(19), 10.1029/2019JD031586.
Research Highlight

Tridon F, A Battaglia, and S Kneifel. 2020. "Estimating total attenuation using Rayleigh targets at cloud top: applications in multilayer and mixed-phase clouds observed by ground-based multifrequency radars." Atmospheric Measurement Techniques, 13(9), 10.5194/amt-13-5065-2020.

Matrosov S, A Ryzhkov, M Maahn, and G Boer. 2020. "Hydrometeor shape variability in snowfall as retrieved from polarimetric radar measurements." Journal of Applied Meteorology and Climatology, 59(9), 10.1175/JAMC-D-20-0052.1.
Research Highlight

Johnson K, T Fairless, and S Giangrande. 2020. Ka-Band ARM Zenith Radar Corrections (KAZRCOR, KAZRCFRCOR) Value-Added Products. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-203.

Wang D, M Jensen, J D'Iorio, G Jozef, S Giangrande, K Johnson, Z Luo, M Starzec, and G Mullendore. 2020. "An Observational Comparison of Level of Neutral Buoyancy and Level of Maximum Detrainment in Tropical Deep Convective Clouds." Journal of Geophysical Research: Atmospheres, 125(16), e2020JD032637, 10.1029/2020JD032637.
Research Highlight

View All Related Publications