Wiyanti, Yeny (2014) Pengaruh Sintilasi Ionosfer Terhadap Akurasi Penentuan Posisi Absolut Pada Global Positioning System (GPS),. Sarjana thesis, Universitas Brawijaya.
Abstract
Penelitian ini membahas tentang analisis pengaruh dari fenomena sintilasi di lapisan ionosfer terhadap akurasi pengukuran posisi pada Global Positioning System (GPS). Sebelum sinyal satelit GPS yang berupa gelombang elektromagnetik mencapai bumi, maka sinyal tersebut harus melalui lapisan ionosfer. Karena perubahan kerapatan elektron di lapisan F ionosfer, sinyal yang ditransmisikan dari satelit ke penerima GPS mengalami penurunan intensitas daya serta gangguan pada amplitudo dan fasanya. Dengan adanya penelitian ini maka, mitigasi pengaruh kemunculan sintilasi terhadap akurasi posisi dapat dilakukan dengan cara menghindari pengukuran GPS yang memerlukan ketelitian tinggi pada waktu-waktu tersebut untuk mendapatkan hasil pengukuran yang lebih baik. Peneltian ini menggunakan data standar GPS RINEX. Metode penentuan posisi menggunakan metode absolut yaitu satu penerima GPS di titik lokasi Stasiun Tetap Cibinong milik BIG dengan lintang dan bujur (6.49° LS,106.84°BT). Dengan metode absolut akan lebih mudah untuk melihat seberapa besar metode ini mampu mengatasi efek sintilasi. Besar kesalahan pengukuran posisi ditentukan oleh besar atau tidaknya nilai indeks sintilasi (S4). Berdasarkan data ground track, saat terjadi sintilasi lemah dengan indeks sintilasi S4 < 0.2, kesalahan pengukuran data posisi ground track dibawah 5 meter. Sedangkan, pada saat terjadi sintilasi kuat dengan nilai indeks sintilasi S4 > 0.5 didapatkan kesalahan pengukuran mencapai 12 meter. Dari hasil penelitian dapat disimpulkan bahwa, semakin besar indeks sintilasi (S4) maka kesalahan pengukuran posisi yang di terima di receiver semakin tinggi.
English Abstract
This study discusses the analysis of the effect of ionospheric scintillation events to the accuracy of the measurement position using GPS. Before a GPS satellite signal as electromagnetic waves reach the earth, the signal must pass through a layer of the ionosphere. Due to changes in the electron density in the F layer of the ionosphere, the signal transmitted from the satellite to the GPS receiver and the power intensity has decreased in amplitude and phase disturbances. Given this research, then, the emergence of scintillation mitigation effect on positioning accuracy can be done by avoiding the GPS measurements that require high accuracy at these times to get a better measurement results This study uses data GPS RINEX standard. Positioning methods using the absolute method in which the GPS receiver location points belonging to the BIG Cibinong Fixed Station with latitude and longitude (6:49 ° S, 106.84 ° E). With the absolute method will be easier to see how big this method is able to reduce the effects of scintillation. Large measurement error is determined by the position of whether or not the value of scintillation index (S4). Based on ground track data position , when there is a weak scintillation with S4 scintillation index <0.2, the ground track data position measurement error of less than 5 meter. Whereas, in the event of strong scintillation with an index value of scintillation S4> 0.5 obtained measurement error reaches 12 meters. The results of this study concluded that, the greater the scintillation index (S4), the measurement error in the received position in the higher receiver.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2014/550/051405362 |
| Subjects: | 600 Technology (Applied sciences) > 621 Applied physics > 621.3 Electrical, magnetic, optical, communications, computer engineering; electronics, lighting |
| Divisions: | Fakultas Teknik > Teknik Elektro |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 05 Sep 2014 08:19 |
| Last Modified: | 22 Oct 2021 04:17 |
| URI: | http://repository.ub.ac.id/id/eprint/142863 |
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