Instrument : Ka ARM Zenith Radar (KAZR)

Instrument Categories
Cloud Properties

General Overview

The Ka-band ARM zenith radar (KAZR) remotely probes the extent and composition of clouds at millimeter wavelengths. The KAZR is a zenith-pointing Doppler radar that operates at a frequency of approximately 35 GHz. The main purpose of this radar is to determine the first three Doppler moments (reflectivity, vertical velocity, and spectral width) at a range resolution of approximately 30 meters from near-ground to nearly 20 km in altitude.

The KAZR replaces the millimeter wavelength cloud radar (MMCR) and utilizes a new digital receiver that provides higher spatial and temporal resolution than the MMCR. In addition, spectral artifacts in the data are significantly reduced in the KAZR, providing researchers the ability to study cloud dynamics to a much higher degree than with the MMCR.

Output Datastreams

  • kazrge : Ka ARM Zenith Radar (KAZR): general mode
  • kazrhi : Ka ARM Zenith Radar (KAZR): highest sensitivity mode
  • kazrmd : Ka ARM Zenith Radar (KAZR): moderate sensitivity mode
  • kazrspeccmaskblcopol : Ka ARM Zenith Radar (KAZR): filtered spectral data, Boundary Layer mode, co-polarized mode
  • kazrspeccmaskblxpol : Ka ARM Zenith Radar (KAZR): filtered spectral data, Boundary Layer mode, cross-polarized mode
  • kazrspeccmaskcicopol : Ka ARM Zenith Radar (KAZR): filtered spectral data, cirrus mode, co-polarized mode
  • kazrspeccmaskcixpol : Ka ARM Zenith Radar (KAZR): filtered spectral data, cirrus mode, cross-polarized mode
  • kazrspeccmaskgecopol : Ka ARM Zenith Radar (KAZR): filtered spectral data, general mode, co-polarized mode
  • kazrspeccmaskgexpol : Ka ARM Zenith Radar (KAZR): filtered spectral data, general mode, cross-polarized mode
  • kazrspeccmaskhicopol : Ka ARM Zenith Radar (KAZR): filtered spectral data, high sensitivity mode, co-polarized mode
  • kazrspeccmaskmdcopol : Ka ARM Zenith Radar (KAZR): filtered spectral data, moderate sensitivity mode, co-polarized mode
  • kazrspeccmaskmdxpol : Ka ARM Zenith Radar (KAZR): filtered spectral data, moderate sensitivity mode, cross-polarized mode

Primary Measurements

The following measurements are those considered scientifically relevant.

Locations

North Slope Alaska
NSAC1Browse DataCentral Facility, Barrow AK
Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK
Tropical Western Pacific
TWPC1Browse DataCentral Facility, Manus I., PNG
TWPC3Browse DataCentral Facility, Darwin, Australia
ARM Mobile Facility
GANM1Browse DataGan Airport, Gan Island, Maldives
MAGM1Browse DataLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit
TMPM1Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2

Contact(s)

Kevin Widener
(509) 528-9565
kevin.widener@pnnl.gov

Nitin Bharadwaj
associate
(509) 372-4267
nitin@pnnl.gov

Dan Nelson
associate
(509) 375-6895
danny.nelson@pnnl.gov

Vijay Venkatesh
associate
(509) 375--6470
vijayv@pnnl.gov

Iosif (Andrei) Lindenmaier
associate
(509) 375--6802
iosif.lindenmaier@pnnl.gov

Karen Johnson
data analysis
(631) 344-5952
kjohnson@bnl.gov