kasacr: Ka-Band Scanning ARM Cloud Radar

The Ka-Band Scanning ARM Cloud Radar (KASACR) records cloud properties.

ARM’s scanning cloud radars are dual-frequency, dual-polarization Doppler radars mounted on a common scanning pedestal. Each pedestal includes a Ka-band radar (2kW peak power) and the deployment location determines whether the second radar is a W-band (1.7 kW peak power) or X-band (20 kW peak power).

Beamwidths for Ka-bands paired with W-bands are roughly matched at 0.3 degrees. The X-band beamwidth is approximately 1 degree. Due to the narrow antenna beamwidth, ARM’s scanning cloud radars use scanning strategies unlike typical weather radars. Rather than focusing on plan position indicator, or PPI, scans, the Ka-SACR uses range height indicator, or RHI, scans at numerous azimuths to obtain cloud volume data. Measurements collected with the Ka-SACR are copolar and cross-polar radar reflectivity, Doppler velocity, spectra width and spectra when not scanning, and linear depolarization ratio.



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Verlinde J, MJ Bartholomew, J Cherry, and M Ritsche. 2017. North Slope of Alaska Snow Intensive Operational Period Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-17-018.

Acquistapace C, S Kneifel, U Löhnert, P Kollias, M Maahn, and M Bauer-Pfundstein. 2017. "Optimizing observations of drizzle onset with millimeter-wavelength radars." Atmospheric Measurement Techniques, 10(5), 10.5194/amt-10-1783-2017.

Le M, V Chandrasekar, and S Biswas. 2017. "An Algorithm to Identify Surface Snowfall From GPM DPR Observations." IEEE Transactions on Geoscience and Remote Sensing, 55(7), 10.1109/TGRS.2017.2687420.


Helmus JJ and SM Collis. 2016. "The Python ARM Radar Toolkit (Py-ART), a Library for Working with Weather Radar Data in the Python Programming Language." Journal of Open Research Software, 4(1), 10.5334/jors.119.

Berg LK. 2016. Two-Column Aerosol Project (TCAP) Field Campaign Report. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-16-032.

Stepanian PM and KG Horton. 2016. The Nocturnal Avian Migration Experiment Final Campaign Report. DOE ARM Climate Research Facility. DOE/SC-ARM-15-009.


Kneifel S, A von Lerber, J Tiira, D Moisseev, P Kollias, and J Leinonen. 2015. "Observed relations between snowfall microphysics and triple-frequency radar measurements." Journal of Geophysical Research: Atmospheres, 120(12), 10.1002/2015jd023156.

Jundt R. 2015. ARM Mobile Facility Fact Sheet. DOE/SC-ARM-15-022.


Borque P, P Kollias, and S Giangrande. 2014. "First Observations of Tracking Clouds Using Scanning ARM Cloud Radars." Journal of Applied Meteorology and Climatology, 53(12), 10.1175/jamc-d-13-0182.1.

Fielding MD, J Chiu, RJ Hogan, and G Feingold. 2014. "A novel ensemble method for retrieving properties of warm cloud in 3-D using ground-based scanning radar and zenith radiances." Journal of Geophysical Research: Atmospheres, 119(18), 10.1002/2014jd021742.

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