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Abstract
Environment Monitoring by GPS: Towards Urban and Forest Monitoring
Wedyanto Kuntjoro
Geodesy Laboratory, Department of Geodetic Engineering ITB, Indonesia
wedyanto@gd.itb.ac.id
Bambang Setyadji
Geodesy Laboratory
Department of Geodetic Engineering ITB, Indonesia
Andri A. Purwantara
Geodesy Laboratory
Department of Geodetic Engineering ITB, Indonesia
Dudy Darmawan
Nagoya University, Japan
Abstract :
Global Positioning System (GPS), satellites navigation, provides 24 satellites at about 22,000 km above the earth surface. This high orbit causes users, in their measurement, should concern to the propagation media in the atmosphere especially the troposphere and ionosphere. By obtaining the tropospheric delay factor, which consists of (1). The dry delay,--hydrostatic condition--, and (2). The wet delay, --water vapour--, the measurement method can be an alternative method of environment monitoring. We have established the measurement, --using fast static methods--, at Bandung urban area that the delay due to tropospheric condition was varied about 17.37 mm. Also, the method, -- using the static differential technique--, was applied to tea plantation area i.e. Lembang, Mount of Tangkuban prahu and Ciater that the tropospheric delay was up to 50 mm.
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