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
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
ARM Mobile Facility
FKBM1 Browse Data Browse PlotsBlack Forest, Germany
GRWM1 Browse Data Browse PlotsGraciosa Island, Azores, Portugal
HFEM1 Browse Data Browse PlotsShouxian, Anhui, China
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
NIMM1 Browse Data Browse PlotsNiamey, Niger
PVCM1 Browse Data Browse PlotsHighland 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