wsacr: W-band Scanning ARM Cloud Radar

ARM’s scanning cloud radars are fully coherent 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 (WSACR; 1.7 kW peak power) or X-band (XSACR; 20 kW peak power). Beamwidths at Ka and W bands are roughly matched at 0.3 degrees.

Due to the narrow antenna beamwidth, ARM’s scanning cloud radars use scanning strategies that are 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 W-SACR are copolar and cross-polar radar reflectivity, Doppler velocity, spectra width and spectra when not scanning, and linear depolarization ration.



  • Fixed
  • AMF1
  • AMF2
  • AMF3

Related Publications


Matrosov S, J Hardin, G de Boer, M Shupe, M Maahn, and C Williams. 2017. AMF3 CloudSat Overpasses Field Campaign Report. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-17-029.

Arulraj M and A Barros. 2017. "Shallow Precipitation Detection and Classification Using Multifrequency Radar Observations and Model Simulations." Journal of Atmospheric and Oceanic Technology, 34(9), 10.1175/JTECH-D-17-0060.1.


Shariff K. 2016. "Making Aircraft Vortices Visible to Radar by Spraying Water into the Wake." Journal of Atmospheric and Oceanic Technology, 33(12), 10.1175/jtech-d-16-0066.1. ONLINE.

Zheng Y, D Rosenfeld, and Z Li. 2016. "Quantifying cloud base updraft speeds of marine stratocumulus from cloud top radiative cooling." Geophysical Research Letters, 43(21), 10.1002/2016gl071185.

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.


Roeder L. 2015. ARM West Antarctic Radiation Experiment (AWARE) Backgrounder. Ed. by Dana DuPont, ARM Climate Research Facility. DOE/SC-ARM-15-045.

Tridon F and A Battaglia. 2015. "Dual-frequency radar Doppler spectral retrieval of rain drop size distributions and entangled dynamics variables." Journal of Geophysical Research: Atmospheres, 120(11), 10.1002/2014jd023023.

Roeder L. 2015. Evaluation of Routine Atmospheric Sounding Measurements Using Unmanned Systems (ERASMUS) Backgrounder. Ed. by Dana DuPont, ARM Climate Research Facility. DOE/SC-ARM-15-017.

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


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.

View All Related Publications