Print Email Facebook Twitter Object-Orientated Filter Design in Spectral Domain for Polarimetric Weather Radar Title Object-Orientated Filter Design in Spectral Domain for Polarimetric Weather Radar Author Yin, J. (TU Delft Atmospheric Remote Sensing) Unal, C.M.H. (TU Delft Atmospheric Remote Sensing) Russchenberg, H.W.J. (TU Delft Geoscience and Remote Sensing) Department Geoscience and Remote Sensing Date 2018 Abstract Aiming at removing stationary and moving clutter while retaining precipitation for dual-polarization weather radar, a new clutter suppression method, named the object-orientated spectral polarimetric (OBSpol) filter, is put forward in this paper. Based on the spectral polarimetric feature and the range-Doppler continuity of precipitation, the OBSpol filter generates a filtering mask implemented on the raw range-Doppler spectrogram to mitigate the clutter and noise. The procedures are as follows. After the spectral polarimetric filtering and the mathematical morphology method, one binary mask where “1” indicates the precipitation is obtained. Then, the contiguous bins of the same value “1” in the range-Doppler domain are grouped in areas termed as objects. Whether the produced objects are precipitation or not will be further judged based on appropriate weather radar observable. Thus, combining all the filtered separate objects, a filtering mask can be obtained. In this paper, data collected by the polarimetric Doppler IRCTR drizzle radar are used to demonstrate and assess the performance of the proposed technique in the case of ground clutter, narrowband moving clutter, and noise. Two precipitation cases are examined: 1) moderate precipitation with large scale and 2) light precipitation with severe clutter contamination. In the range-Doppler spectrogram, both stationary and narrowband moving clutters are mitigated, while maintaining nonoverlapping precipitation signal. This helps to solve the problem when clutter and precipitation overlap in the time domain. In addition, the OBSpol filter is proven to be effective with different Doppler velocity resolutions. This technique can be applied in real-time due to its low computation complexity. Moreover, the spectral polarimetric filtering can be designed using the measurements of dual-polarization radar systems which do not have cross-polar measurements. Hence, the proposed clutter mitigation technique can be implemented for operational dual-polarization weather radar. Subject Dual-polarization weather radarmoving clutterobject-orientatedrange-Doppler continuityreal-time clutter mitigationspectral-polarimetryweak precipitation signal To reference this document use: http://resolver.tudelft.nl/uuid:103cc1d2-6970-4d7b-9315-83b9607cf445 DOI https://doi.org/10.1109/TGRS.2018.2876632 Embargo date 2019-10-22 ISSN 0196-2892 Source IEEE Transactions on Geoscience and Remote Sensing, 57 (5), 2725-2740 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 J. Yin, C.M.H. Unal, H.W.J. Russchenberg Files PDF Object_Orientated_Filter_ ... _Radar.pdf 9.15 MB Close viewer /islandora/object/uuid:103cc1d2-6970-4d7b-9315-83b9607cf445/datastream/OBJ/view