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- One of the prime instruments for the GPM Core Observatory is called the Dual-frequency Precipitation Radar (DPR). The DPR consists of a Ku-band precipitation radar (KuPR) and a Ka-band precipitation radar (KaPR). The KuPR (13.6 GHz) is an updated version of the highly successful unit flown on the TRMM mission. The KuPR and the KaPR will be co-aligned on the GPM spacecraft bus such that that the 5 km (3.1 mile) footprint location on the earth will be the same.
The DPR is a spaceborne precipitation radar capable of making accurate rainfall measurements. The DPR is expected to be more sensitive than its TRMM predecessor especially in the measurement of light rainfall and snowfall in the high latitude regions. Rain/snow determination is expected to be accomplished by using the differential attenuation between the Ku-band and the Ka-band frequencies. The variable pulse repetition frequency (VPRF) technique is also expected to increase the number of samples at each IFOV to realize a 0.2 mm/h sensitivity.
Information provided by http://pmm.nasa.gov/GPM/flight-project/DPR. See website for top-level general design specifications.
Group: Instrument_Details
Entry_ID: DPR
Group: Instrument_Identification
Instrument_Category: Earth Remote Sensing Instruments
Instrument_Class: Active Remote Sensing
Instrument_Type: Profilers/Sounders
Instrument_Subtype: Radar Sounders
Short_Name: DPR
Long_Name: Dual-frequency Precipitation Radar
End_Group
Group: Associated_Platforms
Short_Name: GPM
End_Group
Online_Resource: http://pmm.nasa.gov/GPM/flight-project/DPR
Creation_Date: 2009-08-11
End_Group
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