Instrument : W-Band (95 GHz) ARM Cloud Radar (WACR)

Instrument Categories
Cloud Properties

Latest version W-band ARM cloud radar

General Overview

The W-band Atmospheric Radiation Measurement (ARM) Program Cloud Radar (WACR) systems are zenith pointing Doppler radars that probe the extent and composition of clouds at 95.04 GHz. The main purpose of this radar is to determine cloud boundaries (e.g., cloud bottoms and tops). This radar reports estimates for the first three spectra moments for each range gate up to 15 km. The 0th moment is reflectivity, the 1st moment is radial velocity, and the 2nd moment is spectral width. Also available are the raw spectra files. Unlike the millimeter wavelength cloud radar (MMCR), the WACR does not use pulse coding and operates in only copolarization and cross-polarization modes.

Output Datastreams

  • wacr : W-band (95 GHz) ARM Cloud Radar
  • wacrspeccmaskcopol : W-band (95 GHz) ARM Cloud Radar, filtered spectral data, co-polarized mode
  • wacrspeccmaskxpol : W-band (95 GHz) ARM Cloud Radar, filtered spectral data, cross-polarized mode
  • wacrspecmom : W-band (95 GHz) ARM Cloud Radar, spectral data

Primary Measurements

The following measurements are those considered scientifically relevant.


Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK
ARM Mobile Facility
FKBM1Browse DataBlack Forest, Germany
GRWM1Browse DataGraciosa Island, Azores, Portugal
HFEM1Browse DataShouxian, Anhui, China
MAOM1Browse DataManacapuru, Amazonas, Brazil; AMF1
NIMM1Browse DataNiamey, Niger
PVCM1Browse DataHighland Center, Cape Cod MA; AMF 1


Nitin Bharadwaj
(509) 372-4267

Dan Nelson
(509) 375-6895

Iosif (Andrei) Lindenmaier
(509) 375--6802

Karen Johnson
data analysis
(631) 344-5952