Instrument : Millimeter Wavelength Cloud Radar (MMCR)

Instrument Categories
Cloud Properties

Picture of the Millimeter Wave Cloud Radar (MMCR)

General Overview

The MMCR systems probe the extent and composition of clouds at millimeter wavelengths. The MMCR is a zenith-pointing radar that operates at a frequency of 35 GHz. The main purpose of this radar is
to determine cloud boundaries (e.g., cloud bottoms and tops). This radar will also report radar reflectivity (dBZ) of the atmosphere up to 20 km. The radar possesses a doppler capability that will allow the measurement of cloud constituent vertical velocities.

Output Value-Added Products

This instrument is an input to the following value-added products, which provide improved measurements or derived quantities.

Output Datastreams

  • mmcrcal : Millimeter Wavelength Cloud Radar (MMCR): calibration data
  • mmcrmom : Millimeter Wave Cloud Radar (MMCR), replaces mmcrcal and mmcrmoments datastreams following C-40 processor upgrade of 2003.09.09
  • mmcrmoments : Millimeter Wavelength Cloud Radar (MMCR): moments data
  • mmcrmon : Millimeter Wavelength Cloud Radar (MMCR): monitoring data
  • mmcrpow : Millimeter Wavelength Cloud Radar (MMCR): transmitted RF power
  • mmcrspeccmaskbl : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, boundary layer mode
  • mmcrspeccmaskci : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, cirrus mode
  • mmcrspeccmaskcopol : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, co-polarized mode
  • mmcrspeccmaskge : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, general mode
  • mmcrspeccmaskpr : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, precipitation mode
  • mmcrspeccmaskxpol : Millimeter Wave Cloud Radar (MMCR), filtered spectral data, cross-polarized mode
  • mmcrspecmom : Millimeter Wave Cloud Radar (MMCR), spectral data
  • mmcrspectra : Millimeter Wavelength Cloud Radar (MMCR): spectral data

Primary Measurements

The following measurements are those considered scientifically relevant.


North Slope Alaska
NSAC1 Browse DataCentral Facility, Barrow AK retired
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK retired
Tropical Western Pacific
TWPC1 Browse DataCentral Facility, Manus I., PNG retired
TWPC2 Browse DataCentral Facility, Nauru Island retired
TWPC3 Browse DataCentral Facility, Darwin, Australia retired
 retired = Originating instrument has been retired at this location


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

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