Indonesian National Institute of Aeronautics and Space

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    Era Baru Perjuangan Indonesia Atas Orbit Geostasioner

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    Hlm. 48-5

    PUSKKPA Dalam Foto

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    Hlm. 74-7

    foto..

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    Model Badai Ionosfer Indonesia Terkait Badai Geomagnet

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    Pengetahuan tentang respon ionosfer terhadap badai geomagnet sangat diperlukan untuk mendukung kegiatan SWIFtS di Pusat Sains Antariksa-LAPAN. Namun, sulit diprediksi perilakunya. Sebagai pendekatan, diperlukan sebuah model respon ionosfer terhadap badai geomagnet. Dalam makalah ini, dilakukan pemodelan badai ionosfer Indonesia terkait badai geomagnet dengan memodifikasi model empiris global yang telah dikembangkan oleh Araujo-Pradere. Dengan menggunakan data indeks ap, indeks Dst dan foF2 ionosfer BPAA Sumedang tahun 2005-2015 diperoleh model badai ionosfer regional Indonesia terhadap badai geomagnet. Dari analisis disimpulkan bahwa model badai ionosfer Sumedang tersebut memiliki simpangan atau kesalahan < 40% terhadap data. Hal ini menunjukkan bahwa model badai ionosfer Sumedang tersebut dapat dipergunakan untuk mendukung kegiatan SWIFtS di Pusat Sains Antariksa-LAPAN sebagai bahan pertimbangan dalam memprediksi kondisi cuaca antariksa akan datangHlm.25-3

    CAN THE PEAT THICKNESS CLASSES BE ESTIMATED FROM LAND COVER TYPE APPROACH ?

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    Indonesia has been known as a home of the tropical peatlands. The peatlands are mainly in Sumatera, Kalimantan and Papua Islands. Spatial information on peatland depth is needed for the planning of agricultural land extensification. The research objective was to develop a preliminary estimation model of peat thickness classes based on land cover approach and analyse its applicability using Landsat 8 image. Ground data, including land cover, location and thickness of peat, were obtained from various surveys and peatlands potential map (Geology Map and Wetlands Peat Map). The land cover types were derived from Landsat 8 image. All data were used to build an initial model for estimating peat thickness classes in Merauke Regency. A table of relationships among land cover types, peat potential areas and peat thickness classes were made using ground survey data and peatlands potential maps of that were best suited to ground survey data. Furthermore, the table was used to determine peat thickness classes using land cover information produced from Landsat 8 image. The results showed that the estimated peat thickness classes in Merauke Regency consist of two classes, i.e., very shallow peatlands and shallow peatlands. Shallow peatlands were distributed at the upper part of Merauke Regency with mainly covered by forest. In comparison with Indonesia Peatlands Map, the number of classes was the two classes. The spatial distribution of shallow peatlands was relatively similar for its precision and accuracy, but the estimated area of shallow peatlands was greater than the area of shallow peatlands from Indonesia Peatlands Map. This research answered the question that peat thickness classes could be estimated by the land cover approach qualitatively. The precise estimation of peat thickness could not be done due to the limitation of insitu data.Hlm.93-9

    ANALISIS JARAK OPTIMUM PADA PENGUJIAN KAMERA MICROBOLOMETER = OPTIMUM DISTANCE ANALYSIS ON MICROBOLOMETER CAMERA TESTING

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    Abstrak Microbolometer merupakan salah satu sensor thermal infrared yang bekerja pada wilayah spektrum 8-14 mikrometer. Jika dipasang pada satelit, sensor ini akan dapat digunakan untuk mendeteksi adanya kebakaran lahan, suhu permukaan air laut, dan pemantauan aktivitas vulkanik. Penelitian ini bertujuan untuk melakukan pengukuran jarak optimum objek terhadap kamera dengan kondisi ruang uji yang terbatas. Dalam pengujian ini hasil yang paling baik dalam pengukuran pada jarak minimal 240 cm Abstract Microbolometer is one of the thermal infrared sensors that work on the 8-14 micrometer spectrum region. If mounted on a satellite, this sensor can be used to detect land fires, sea surface temperature, and volcanic activity monitoring. This study aims to measure the optimum distance of the object to the camera with limited test room conditions. In this test the best result in Measurement at a distance of at least 240 cm.Hlm.82-88:Il.;29,7 Cm

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