Analisis Perubahan Cuaca Dengan Menggunakan Precipitable Water Vapor Dari Global Positioning System (GPS)

Setiawan, Virdonio Fila (2017) Analisis Perubahan Cuaca Dengan Menggunakan Precipitable Water Vapor Dari Global Positioning System (GPS). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Precipitable Water Vapor (PWV) adalah campuran zat oksigen dan hydrogen yang mengalami reaksi kimia dan dengan bantuan panas matahari berubah bentuk menjadi zat cair. Kandungan uap air memainkan peranan penting dalam mengatur temperatur udara karena menyerap radiasi metahari dan radiasi termal dari permukaan bumi (Miller, 1983).
Pengamatan kandungan uap air yang banyak diteliti di atmosfer masih menjadi banyak pekerjaan yang belum terselesaikan oleh para peneliti atmosfer. Dimana pengamatan yang akurat terhadap pergerakan kandungan uap air yang cepat dimana variasi temporal maupun spasial di atmosfer sangat sulit dilakukan.
Global Positioning System atau lebih dikenal dengan sebutan GPS telah menawarkan metode baru untuk meneliti kandungan uap air yang ada di atmosfer secara akurat dengan cara memberikan parameter dari atmosfer di troposfer dan stratosfer melalui penyebaran sinyal gelombang mikro dari satelit GPS ke ground-based receiver GPS yang tertunda oleh uap air di atmosfer. Penundaan didapat dari parameter Zenith Delay Troposfer (ZTD), dimana ZTD adalah besarnya penyimpangan jarak akibat perlambatan waktu tempuh sinyal saat melewati lapisan troposfer.
Dalam penelitian tugas akhir ini dilakukan penentuan delay troposfer dan kandungan uap air menggunakan perangkat lunak ilmiah GAMIT pada bulan Juli-September Tahun 2015. Dengan memanfaatkan 5 (lima) titik pengamatan GPS yang ada di Jembatan Suramadu, dan 1 (satu) titik pengamatan GPS di ITS. Serta diikatkan di 1 titik ikat stasiun IGS, diantaranya stasiun BAKO. Penelitian tugas akhir ini menghasilkan nilai Precipitable Water Vapor (PWV) berkisar 23.49 – 29.23 mm yang menunjukkan bahwa pada bulan juli-agustus mengalami musim kemarau, sedangkan Precipitable Water Vapor (PWV) pada bulan September 2015 berkisar 19.40 – 35.33 mm mengalami peningkatan dan dapat diperkirakan bahwa bulan selanjutnya akan mengalami musim penghujan.
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Precipitable Water Vapor (PWV) is a mixture by chemical reaction of two substances (oxygen and hydrogen) and with the solar heat it changes into liquid. The content of water vapor have an important role in regulating air temperature because it absorbs sun radiation and thermal radiation from the earth surface (miller, 1983).
Observations of water vapor content that is widely studied in the atmosphere is still a lot of unfinished work by the atmosphere researchers. The accurate observation of the water vapor content that movement rapidly where the variation of temporal or spatial in the atmosphere are difficult to do.
Global Positioning System or better known as GPS has offered a new method to reasearch the content of water vapor in the atmospheres accurately by providing parameters of the atmosphere in the troposphere and the stratosphere through the dissemination of microwave signals from GPS satellites to ground-based GPS receivers that are delayed by water vapor in the atmosphere.
The delay is obtained from the Zenith Delay Troposphere (ZTD) parameter, where ZTD is the distortion of the distance due to the slowing of signal travel as it passes through the troposphere layer.
In this final task, the tropospheric delay and moisture content are determine using GAMIT scientific software in July-September 2015. By utilizing 5 (five) GPS observation points in the Suramadu Bridge, and 1 (one) GPS observation point in ITS. And connect to 1 point IGS station as connective point, including BAKO stations. This thesis research produce Precipitable Water Vapor (PWV) ranging from 23.49 - 29.23 mm indicate that in July-August is dry season, while Precipitable Water Vapor (PWV) value in September 2015 has range from 19.40 - 35.33 mm that increased and it can be predicted that the next month will in the rainy season.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Global Positioning System (GPS), Precipitable Water Vapor (PWV), Zenith Delay Troposfer (ZTD)
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System Q Science > QB Astronomy
Divisions:	Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	VIRDONIO FILA SETIAWAN
Date Deposited:	06 Oct 2017 03:46
Last Modified:	03 Jan 2018 03:51
URI:	http://repository.its.ac.id/id/eprint/43900

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