pemanfaatan data gelombang mikro pasif dan inframerah dalam pemisahan butiran awan konvektif dan stratiform
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2014
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Abstract
Di wilayah tropis, jenis awan dapat dibagi atau dipisahkan menjadi 2 kelompok yakni konvektif dan stratiform. Pada penelitian ini dilakukan pemisahan dengan menggunakan 3 metode pemisahan yakni Convective Stratiform Technique (CST), Variability Index (VI) dan Window Channel Difference (WCD). Ketiga metode tersebut memanfaatkan data satelit cuaca baik satelit gelombang mikro pasif maupun inframerah sebagai masukan utamanya. Verifikasi menggunakan metode tabel kontingensi dari ketiga metode tersebut dilakukan dengan menggunakan data radar cuaca. Penggunaan data radar cuaca sebagai pembanding didasarkan atas kemampuan data radar yang lebih baik dari satelit dalam mendeteksi kondisi hidrometeor. Penelitian dilakukan di wilayah Jawa Barat, Banten dan DKI Jakarta untuk tujuh hari pengamatan yang dilaksanakan pada awal Januari 2010. Selama tujuh hari pengamatan diperoleh 180 titik yang bersesuaian waktu dan posisi antara data satelit dan radar. Berdasarkan hasil verifikasi di 180 titik tersebut diketahui bahwa metode CST adalah metode terbaik untuk melakukan pemisahan yang selanjutnya diikuti oleh VI dan terakhir WCD.
Separation of 2 main groups of tropical rainfall namely convective and stratiform was conducted in this research. There are 3 methods of separation i.e. Convective Stratiform Technique (CST), Variability Index (VI) and Window Channel Difference (WCD). These methods utilized the passive microwave and infrared weather satellite data. Verification using contingency table method of separation results from those methods has also been done in this research to assess the quality of separation. To verify the separation results, the same methods were applied to radar data. Utilization of radar data for verification was considered due to its ability on observing the hydrometeor which is more sensitive than satellite. From seven observation days in early January 2010 there were found 180 points with appropriate position and time among passive microwave satellite, infrared satellite and radar in West Java, Banten and Jakarta area. Based on the verification results at those points, the CST give the best outcome, followed by VI and WCD.
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gunawan2014jurnalpemanfaatan
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| Authors | ;Dodo Gunawan;Endarwin Endarwin;Radyan Putra Pradana |
| Journal | clinical proteomics |
| Year | 2014 |
| DOI |
10.31172/jmg.v14i1.145
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