Abstract
The movement of celestial bodies produces a variation of a gravitational gradient as a tidal generation force (GPP). Position Sabang Station, declination maximum and position lunar month of Muharram aka n generate harmonic constituent character identifier of GPP, where the water level is the sum of the amplitude of harmonic constituent that generated at a certain time.This research is to determine the variation of harmonic constituents and identify the character of harmonic constituents of GPP component position characterization in Muharram month. The results show Katrakteristik tidal movement beginning of the month of Muharram in Sabang Station occurred 1-2 hours after ijtimak.. Value riding dominant water derived from the value of Mean Sea Level ( 52%), and the dominant contribution hamonik constituents derived from component M 2 (28 - 33%). Harmonic constituents M 2 does not show the position of the moon in Muharram, while the position of the sun is reflected in the constituent phase harmonic S 2..
Highlights
The movement of celestial bodies produces a variation of the gravitational gradient as a tidal generation force (TGF)
The results show that the characteristic of tidal movements at the beginning of Muharram in Sabang Station was occurred 1-2 hours after ijtimak
Journal of Geophysical Research: Solid Earth, 86(B2): 881-891
Summary
Stasiun pasang surut Sabang digunakan sebagai lokasi untuk menganalisis posisi GPP pergerakan pasang surut yang berada pada posisi geografis 05o 53,3¢ LU dan 95o 19,0¢ BT (Gambar 1). Data pasang surut dengan format penanggalan matahari (masehi/georgoran), selanjutnya dikelompokkan berdasarkan penanggalan hijriah, dimana penentuan awal Bulan baru hijriah merujuk pada kalender yang dikeluarkan Lajnah Falakiah Nahdathul Ulama (LFNU, 2013). Permulaan hari penanggalan hijriah dimulai sekitar jam 18:00 waktu lokal (LT) dimana awal Bulan hijriah dimulai sejak terjadinya ijtimak (Jayusman, 2015) yaitu posisi Bulan dan Matahari berada pada satu garis lurus dilihat dari bumi. Analisis data Posisi Bulan dan Matahari (ekliptika) ditentukan dengan perhitungan nilai ephemeries menggunakan software Accurate Times 5.3.6 (Odeh, 2013) untuk nilai Right Ascension (RA.) and Declination (Dec.) sebagai posisi benda langit (GPP).
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