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Abstract

The Dual-frequency Precipitation Radar (DPR) on board the GPM core satellite is composed of two radars: a Ku-band (13.6-GHz) Precipitation Radar (KuPR) and a Ka-band (35.5-GHz) Precipitation Radar (KaPR).

The KaPR instrument aims at sensitive observation, and can detect weak rainfall and snowfall that cannot be measured by KuPR. Since the KuPR instrument can detect heavier rainfall, simultaneous observation by the KaPR and KuPR will enable accurate measurement of precipitation from heavy rainfall in tropics to weak snowfall in high-latitudes.

Rain echo is affected by precipitation attenuation, and its amount depends on radar frequency and raindrop size. By matching position of radar beams and timing of transmitted pulses for KuPR and KaPR, and by measuring precipitation particles at the same place simultaneously by dual-frequency, size of precipitation particles (raindrop size distribution) can be estimated by differences in precipitation attenuation.

This will improve the accuracy of precipitation estimation since the information could not be obtained by single-frequency radar, such as the TRMM’s PR. It is also expected to identify rainfall and snowfall by using differences in precipitation attenuation for dual-frequency.

Topic Category(ISO19139)

• climatologyMeteorologyAtmosphere

Temporal Extent

Geographic Bounding Box

Keywords

Keywords on Dataset

Keyword Type	Keyword	Keyword thesaurus Name
theme	[Atmosphere ] > [Precipitation ] > [Precipitation Amount ], [Atmosphere ] > [Precipitation ] > [Rain ]	GCMD_science

Online Resource

• JAXA Globe Portal (G-Portal) : https://www.gportal.jaxa.jp/gp/top.html

Data Processing (1)

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