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| Titel |
Dual Ka-band radar experiment for GPM DPR algorithm development |
| VerfasserIn |
Kenji Nakamura, Masanori Nishikawa, Haruya Minda, Shuji Shimizu, Katsuhiro Nakagawa, Hiroshi Hanado |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250046507
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| Zusammenfassung |
| A dual Ka-band radar system is developed by the Japan Aerospace Exploration Agency
(JAXA) for the GPM DPR algorithm development. The dual Ka-radar system which consists
of two identical Ka-band radars can measure both the specific attenuation and the equivalent
radar reflectivity at Ka-band. Those parameters are important particularly for snow
measurement. Using the dual Ka-radar system along with other instruments, such as a
polarimetric precipitation radar, a windprofiler radar, ground-based rain measurement
systems, the uncertainties of the parameters in the DPR algorithm can be reduced. The
verification of improvement of rain retrieval with the DPR algorithm is also included as an
objective.
Currently the dual Ka-band radar system is at the Okinawa Subtropical Environment
Remote Sensing Center, the National Institute of Information and Communications
Technology (NICT). There, simultaneous observation of rain with a C-band polarimetric
Doppler radar and ground rain observation instruments is ongoing. The radar is a FMCW
system with a relatively low transmitting power of 100 W, and two offset parabolic antennas
for transmission and reception which enable simultaneous transmission and reception. The
system is highly digitized and has flexibility to adjust system parameters with observations,
having three observation modes: (1) nominal mode with 15 km observation range, 50 m range
resolution, (2) long range mode with 30 km observation range, and (3) a high sensitivity
mode with 250 range resolution.
The performance of the dual Ka-band radar system and a preliminary result will be
presented. |
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