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Instrument

D3R
Dual-frequency Dual-polarized Doppler Radar

The Dual-frequency Dual-polarized Doppler Radar (D3R) is a mobile Ku-/Ka-band radar that was developed for NASA’s Global Precipitation Measurement (GPM) mission Ground Validation (GV) program. D3R is an active remote, ground-based sensor that measures radar backscatter to provide reflectivity, Doppler velocity, differential reflectivity, correlation coefficient, and other radar observations. These measurements can be used to derive droplet size distribution and determine hydrometer type. D3R has a beam width around 0.9 degrees, a maximum range of 30 km, and a gate spacing of 150 m. D3R operates at similar wavelengths as the Dual-frequency Precipitation Radar (DPR) on the GPM Core satellite and can be used for validation of DPR observations.

Image of D3R during the IPHEx campaign
NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Instrument Details

Radar
Earth Science > Atmosphere > Precipitation > Hydrometeors
Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain
Earth Science > Spectral/engineering > Radar > Doppler Velocity
Earth Science > Spectral/engineering > Radar > Radar Backscatter
Earth Science > Atmosphere > Precipitation > Droplet Size
Earth Science > Spectral/engineering > Radar > Radar Reflectivity
Full Column Profile
Variable
150 m
13.91 GHz, 35.56 GHz
External Linkhttps://doi.org/10.1109/IGARSS.2012.6350435

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Campaigns
CAMPAIGNS
Platforms
PLATFORMS
External Linkhttp://dx.doi.org/10.5067/GPMGV/IFLOODS/D3R/DATA101
External Linkhttp://dx.doi.org/10.5067/GPMGV/GCPEX/D3R/DATA101
External Linkhttp://dx.doi.org/10.5067/GPMGV/OLYMPEX/D3R/DATA101
External Linkhttp://dx.doi.org/10.5067/GPMGV/IPHEX/D3R/DATA101
External Link10.5067/GPMGV/ICEPOP/D3R/DATA101