Perbandingan Hasil Pengolahan Filter Moving Average dan Filter Upward Continuation pada Data Satelite Gayaberat di Daerah Probolinggo

Anggraeni, Lia Andri (2022) Perbandingan Hasil Pengolahan Filter Moving Average dan Filter Upward Continuation pada Data Satelite Gayaberat di Daerah Probolinggo. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses pengolahan data gayaberat erat kaitannya dengan pemilihan filter untuk memisahkan anomali regional dan anomali residual. Penelitian ini menggunakan dua filter pada pengolahan data untuk membandingkan filter mana yang lebih tepat. Kedua jenis filter yang digunakan yaitu Moving Average Filter dan Upward Continuation Filter.Daerah penelitian terletak di Kabupaten Probolinggo Jawa Timur. Penelitian ini menggunakan data satelit GGMplus (Global Gravity Model Plus) 2013 berupa titik koordinat dan percepatan gayaberat. Data satelit kemudian diproses dengan beberapa tahapan koreksi yang hasilnya merupakan peta Complete Bouguer Anomaly. Penelitian ini menggunakan lebar jendela sebesar 47 untuk Moving Average. Ketinggian Upward Continuation Filter yang diterapkan pada penelitian ini yaitu sejauh 1.500 meter. Anomali residual dari proses Moving Average Filter memiliki rentang nilai -19,3 mgal sampai 8,4 mgal. Anomali rendah hasil filter Moving Average memiliki rentang nilai -19,3 mgal hingga -3,2 mgal, nilai anomali sedang berada pada rentang nilai -2,7 mgal-4,7 mgal, dan anomali gayaberat bernilai tinggi memiliki rentang nilai 5,4 mgal-8,4mgal. Anomali residual dari proses Upward Continuation Filter memiliki rentang nilai -6,8 mgal hingga 5,8 mgal. Anomali rendah dari proses Upward continuation memiliki -6,8 mgal – 0,4 mgal, anomali sedang berada pada rentang nilai 0,5 mgal hingga 2.9 mgal, dan anomali tinggi memiliki rentang nilai 3,3 mgal – 5,8 mgal. Estimasi kedalaman anomali regional yang didapatkan sebesar 5.899 m sedangkan estimasi kedalaman anomali residual yang didapatkan sebesar 432,46 m.Hasil dari kedua filter yang digunakan filter Upward Continuation memperlihatkan hasil yang lebih representatif dabandingkan dengan filter moving average dimana RMS error anomali residual hasil Upward Continuation sebesar 2,76% sedangkan pada anomali residual filter Moving Average RMS error sebesar 8,04%.
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The gravity data processing process is closely related to the selection of filters used to separate regional anomalies and residual anomalies. This study applied two filters in data processing to compare which filter was more appropriate for gravity data in the study area. The two types of filters are Moving Average Filter and Upward Continuation Filter. The study area was located in Probolinggo Regency, East Java. This study used satellite data GGMplus (Global Gravity Model Plus) 2013 in the form of coordinates and acceleration of gravity. This study operated a window width of 47 as a data input to Moving average Filter. The height of the Upward Continuation Filter in this study was 1,500 meters. The residual anomaly from the Moving Average Filter process has a value range of -19.3 mgal to 8.4 mgal. The low anomaly from the Moving Average filter had a value range of -19.3 mgal to -3.2 mgal, the moderate anomaly value was in the range of -2.7 mgal -4.7 mgal, and the high value gravity anomaly had a value range of 5.4 mgal-8.4mgal. The residual anomaly from the Upward Continuation Filter process had a value range of -6.8 mgal to 5.8 mgal. Low anomaly from Upward continuation process had -6.8 mgal to 0.4 mgal, moderate anomaly was in the range of 0.5 mgal to 2.9 mgal, and high anomaly had a value range of 3.3 mgal – 5.8 mgal. The estimated depth of the regional anomaly obtained is 5.899 meters while the estimated depth of the residual anomaly obtained is 432.46 meters.Of the two filters, the upward continuation filter showed results that were more representative than the moving average filter. RMS error residual anomaly from the Upward Continuation filter is 2.76%, while the residual anomaly for the Moving Average RMS filter is 8.04%.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Gravity, Moving Average, Upward Continuation, Gayaberat
Subjects:	Q Science Q Science > QB Astronomy > QB336 Gravity anomalies Q Science > QC Physics Q Science > QC Physics > QC111 Density and specific gravity T Technology > TN Mining engineering. Metallurgy > TN269 Prospecting--Geophysical methods
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Lia Andri Anggraeni
Date Deposited:	09 Feb 2022 03:29
Last Modified:	09 Feb 2022 03:29
URI:	http://repository.its.ac.id/id/eprint/93276

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