Rahayu, Ririn Wuri (2018) Pengaruh Koreksi Bias Ionosfer Terhadap Hasil Koordinat Pengamatan GPS Single Frequency Menggunakan Model Klobuchar. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sinyal satelit GPS dipengaruhi oleh beberapa faktor kesalahan, di antaranya penundaan sinyal GPS oleh ionosfer. Pada GPS single frequency bias ini dapat dikoreksi menggunakan Model Klobuchar, yang memperkirakan penundaan waktu ionosfer hingga 50% atau lebih. Untuk menggunakan model Klobuchar membutuhkan delapan koefisien Klobuchar (αn, βn, untuk n = 1,2,3,4) dan disediakan melalui pesan navigasi. Koefisien Klobuchar didapatkan dari perhitungan data pengamatan GPS yang terdistribusi di seluruh dunia dengan metode yang tidak terpublikasi. Dalam Tugas ini, satu set koefisien Klobuchar dihitung menggunakan data pengamatan GPS lokal sehari sebelumnya dan digunakan sebagai parameter navigasi pada hari selanjutnya untuk menentukan koordinat titik pengamat. Tugas akhir ini melakukan perhitungan nilai Delay ionosphere dan Total Electron Content selama waktu pengamatan menggunakan algoritma Klobuchar. Hasil tugas akhir ini didapatkan nilai koordinat meningkat sebesar 26,015% dengan menggunakan koefisien lokal.
============================================================GPS satellite signals are influenced by several kinds of error factors, among which the GPS signal delay by the ionosphere. For GPS single frequency receiver this delay can be estimated using Klobuchar Model, which estimate ionospheric time delay up to 50% or more. In order to use the Klobuchar model requires eight Klobuchar coefficients (αn, βn, for n=1,2,3,4) and they are provided through the navigation messages. Klobuchar coefficients are calculated by combining the worldwide distributed GPS station’s observation data with unpublished method. In this thesis, a set of new Klobuchar Ionospheric model coefficient computed on ground using previous data and broadcasted as secondary navigation parameters to the user to determine the user’s coordinates. This thesis estimated the Ionospheric delay, and Total Electron Content of ionosphere during the time of observation using the Klobuchar algorithm. As a result,is obtained by increasing the coordinate value of 26.015% by using local coefficients.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Bias ionosfer, GPS Single Frequency, Model Klobuchar |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Geomatics Engineering > 29202-(S1) Undergraduate Theses |
| Depositing User: | Ririn Wuri Rahayu |
| Date Deposited: | 12 Jul 2021 23:00 |
| Last Modified: | 12 Jul 2021 23:00 |
| URI: | http://repository.its.ac.id/id/eprint/55275 |
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