Indonesian National Institute of Aeronautics and Space

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    Hakteknas Cerminan Inovasi dan Kemajuan Iptek LAPAN

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    Hlm.36-3

    BULETIN LAPAN VOL.5 NO.2 2018

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    85Hlm.,ill.; 30 c

    Mengenal Komunikasi Radio Untuk Pengamatan Vertikal

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    Hlm.33-3

    Tinjauan Filsafat: Paradigma Penelitian Penentuan Frekuensi Kerja Sistem Komunikasi Kanal Ionosfer (Philosophy Review: Research Paradigm On The Determination Of Working Frequency In The Ionospheric Communication System)

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    Makalah ini membahas tentang sejarah penelitian ionosfer pada aspek penentuan frekuensi kerja berdasarkan tinjauan filsafat ilmu pengetahuan. Metoda yang digunakan berupa studi literatur dari hasil penelitian yang telah terpublikasi dalam domain publik pada periode tahun 1960 hingga 2018. Tantangan pemanfaatan ionosfer sebagai kanal komunikasi menjadi latar belakang dari perkembangan paradigma penelitian ionosfer yang muncul dan digunakan pada periode awal penelitian hingga saat ini. Pengujian paradigma dengan metoda verifikasi dan falsifikasi menunjukkan revolusi paradigma terjadi sesuai dengan teori yang diungkapkan oleh Thomas Khun. Namun demikian, perkembangan penelitian yang terjadi menunjukkan bahwa paradigma metoda manajemen frekuensi tetap digunakan hingga saat ini, kendatipun sistem Automatic Link Establishment (ALE) muncul sebagai paradigma pengganti yang baru. Seiring dengan kebutuhan pengguna yang meningkat, kombinasi kedua paradigma tersebut memiliki potensi untuk dapat terjadi dan dapat saling melengkapi kelemahan dan keunggulan masing-masingHlm.59-6

    Algoritma Haze Detection Dengan Menggunakan Haze Index Pada Citra Spot 6/7 = Haze Detection Algorithm Using Haze Index On Spot 6/7 Imagery

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    Citra optis multispektral sering terkontaminasi oleh haze maupun cirrus sehingga menurunkan akurasi interpretasi data yang ada. Sejumlah metode untuk melakukan haze detection telah dikembangkan oleh para ahli. Namun demikian, haze detection masih tetap menjadi salah satu tantangan yang penting untuk keperluan koreksi data optis multispektral. Penelitian ini bertujuan untuk menentukan haze index pada citra SPOT 6/7 dengan menentukan nilai threshold untuk haze dan cloud . Citra yang digunakan adalah citra SPOT 6/7 yang memiliki haze di dalamnya. Penelitian ini bertujuan untuk menentukan batas awan dan haze yang dapat digunakan dalam proses selanjutnya, yaitu haze removal. Metode dalam penelitian ini dikembangkan berdasarkan nilai reflektan yang dimiliki oleh band biru dan merah suatu scene citra SPOT 6/7. Metode yang digunakan didasarkan pada perbandingan yang telah dilakukan pada metode STCHT, HOT, dan SHT. Penelitian dilakukan dengan menambahkan formula dengan koefisien yang berbeda dari sebelumnya sehingga diperoleh formula yang sesuai untuk diterapkan pada citra SPOT 6/7 sehingga didapatkan haze index dengan nilai yang optimum. Selanjutnya dilakukan analisa regresi pada batas haze dan awan yang telah diperoleh dari penerapan haze index yang optimum.Hlm. 93-9

    Salt pond analysis using ALOS PALSAR case study Sampang, Madura-Indonesia

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    Indonesia is a country that has a large sea area of about 96,079.15 km2. With this condition we can utilize the natural resources that are infested in the sea, such as fish, and salt. Indonesia has exceptional salt pond commodities from various areas such as Cirebon, Sampang, Indramayu Madura, and Rembang. These resources need to be monitor and inventory in proper way. The development of science and technology, there is an effective and efficient way to identify, monitoring and inventory of salt ponds using remote sensing technology. In this last period the saltwater pond infiltration is still inclined to utilize optical sensor system to monitor and infuse. The method used is visual interpretation through multipolarization composite radar image by using interpretation key. The weakness of passive sensors is affected by the presence of cloud cover. The location of salt ponds in Indonesia is mostly located on the coastal regions that is visually affected cloud cover. In addition the use of active sensor is become a challenging for this aspect. This study was conducted to analysis of hues, patterns, and textures in order to recognize the salt pond object using Alos PALSAR Image (Active Sensor). The salt pond object in multi-polarized composite HH-HH / HV composite radar images is recognizable in dark blue with regular pattern plots with characterized by brighter / clear / bright pink ridges.9 hlm

    Analysis of dissemination methods for remote sensing information in maritime field to support the local government

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    The demand for remote sensing imagery data has been increasing in recent years in Remote Sensing Technology and Data Center LAPAN, especially the utilization of such data for the maritime field. Data request is recorded increasing trend from 808 scenes in 2015 to become 6773 scenes in 2016. Therefore, Remote Sensing Technology and Data Center should improve its services so that information provided to users could be delivered as fast as possible. The objective of this research was to find the best alternatives dissemination from the current method of data distribution and remote sensing information in terms of speed, scalability, functionality and data maintenance in order to support government program on maritime sectors. Alternative to be examined was based on Web-GIS which means that access to data and remote sensing information could be done online through internet. The used of Web-GIS in this study due to the utilization of the internet already prevalent in the present day. Through this method, users could have obtained data and information from anywhere and anytime. As an example, this paper uses mangrove distribution data in Banten as remote sensing data provided. Results are easily obtained mangrove information; the government can overcome the problems that has emerged as the reduced area of mangrove forest which resulted in causing chain actions such as floods and other disasters. Using Web-GIS can be an effective means of dissemination to speed up service.9 hlm

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