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
  • wacrreflmask : 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 DataCentral Facility, Lamont, OK retired
ARM Mobile Facility
FKBM1 Browse Data Browse PlotsBlack Forest, Germany retired
GRWM1 Browse DataGraciosa Island, Azores, Portugal; AMF1 retired
HFEM1 Browse Data Browse PlotsShouxian, Anhui, China retired
MAOM1 Browse DataManacapuru, Amazonas, Brazil; AMF1
NIMM1 Browse DataNiamey, Niger retired
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF1 retired
 retired = Originating instrument has been retired at this location


Joseph Hardin
Pacific Northwest National Laboratory
(509) 375-2664

Dan Nelson
Pacific Northwest National Laboratory
(509) 375-6895

Iosif (Andrei) Lindenmaier
Pacific Northwest National Laboratory
(509) 375--6802

Bradley Isom
Pacific Northwest National Laboratory

Karen Johnson
Brookhaven National Laboratory
data analysis
(631) 344-5952

Alyssa Matthews
Pacific Northwest National Laboratory
data analysis

Nitin Bharadwaj
Pacific Northwest National Laboratory
(509) 372-4267