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      Study on The Backscatter Characteristics of ALOS PALSAR Having Spatial Resolution of 50 Meters and 12.5 Meters within Rubber and Oil Palm Plantations

      Kajian Karakteristik Backscatter ALOS PALSAR Resolusi 50 Meter dan 12,5 Meter pada Perkebunan Karet dan Kelapa Sawit.

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      Date
      2011
      Author
      Mukalil
      Saleh, M. Buce
      Jaya, I Nengah Surati
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      Abstract
      The study was performed to explore the relationship between the dimensions of rubber and oil palm plantations and backscatter of ALOS PALSAR having resolution 50 meters and 12.5 meters. The study was carried out in Simalungun Regency, Serdang Bedagai Regency, Asahan Regency and Pematang Siantar City North Sumatra Province. The main objective of the study is to identify crop variables that affect backscatter value. The study found that the rubber plantation variable that significantly affect the magnitude of backscatter of 50 meter resolution are the diameter at breast high (dbh) and basal area giving an accuracy of 75.44%. For oil palm plantation, the backscatter value was affected by canopy diameter with accuracy of 92.16%. For rubber plantation, the variable that affect the magnitude of backscatter of 12.5 meter resolution are the tree diameters, biomass volume and the ratio of crop spacing as well as canopy area with an accuracy of 66,67%. Meanwhile, for oil palm plantation, it was affected by height of plant with an accuracy of 62.75%.
       
      Sensor radar (radio detection and ranging) merupakan sensor gelombang mikro aktif (microwave) yang memungkinkan untuk melakukan pengamatan permukaan bumi dengan baik. Sensor ini mampu menembus awan, partikel hujan dan mempunyai sumber energi sendiri sehingga mampu melakukan pencitraan baik siang maupun malam dan pada segala macam cuaca. Sampai sekarang telah banyak satelit radar yang dioperasikan menyusul SEASAT, salah satunya adalah ALOS PALSAR. ALOS PALSAR merupakan citra radar yang bekerja pada saluran band-L dengan polarimatrik penuh HH, HV, VV dan VH. Lebar cakupan areal antara 250 sampai 350 km. Sensor dengan band L mampu menembus vegetasi hutan mulai dari daun, ranting, cabang dan bahkan sampai ke batang tanaman. Kemampuan citra ALOS PALSAR menembus vegetasi hutan sampai ke batang tanaman atau tumbuhan bawah akan berpengaruh terhadap sinyal pancar balik (backscatter) pada setiap tutupan lahan, dalam hal ini adalah tutupan lahan perkebunan karet dan perkebunan kelapa sawit. Penelitian ini mempunyai tujuan mengidentifikasi dimensi tanaman perkebunan karet dan perkebunan kelapa sawit yang mempengaruhi nilai backscatter citra ALOS PALSAR resolusi 50 meter dan 12,5 meter.
       
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      http://repository.ipb.ac.id/handle/123456789/52564
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      Indonesia DSpace Group 
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