Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Widyariset Jurnal Sains Dirgantara Widyariset
Tiar Dani
Lembaga Penerbangan dan Antariksa Nasional
Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
PENGARUH FLARE DAN CORONAL MASS EJECTION (CME) TERHADAP INDEKS Dst GEOMAGNET DAN FoF2 IONOSFER DI ATAS TANJUNGSARI SUMEDANG Tiar Dani
Widyariset Vol 12, No 1 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.251 KB) | DOI: 10.14203/widyariset.12.1.2009.81-86

Abstract

This research was conducted to see the effect ofsolarflare and Coronal Mass Ejection (CME) on geomagnetic and ionosphere above Tanjungsari, Sumedang, West Java. By using Disturbance storm time (Dst) index data for geomagnetic disturbance parameter and critical frequency (fo) of F2 ionosphere layer data for ionosphere disturbance parameter; a graph was plotted between occurrence off lare and CME with Dst index andf oF2 from year 2000 to 2003. The result found thatf lare and CME affect disturbance on geomagnetic caused a geomagnetic storm and disturbance on ionosphere cause an ionosphere storm. Those storms were depended by flare class, CME type, and its position on the sun when they happened Flare and CME event that happened also required time to reach the Earth.   
PRAKIRAAN FLARE SINAR-X MATAHARI BERDASARKAN EVOLUSI DAERAH AKTIF Santi Sulistiani; Tiar Dani
Jurnal Sains Dirgantara Vol 16, No 1 (2018)
Publisher : Lembaga Penerbangan dan Antariksa Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (775.345 KB) | DOI: 10.30536/j.jsd.2018.v16.a3088

Abstract

Flare Matahari diketahui berasal dari daerah aktif dan dapat melontarkan energi hingga 1023 erg. Radiasi flare Matahari dapat mengionisasi atmosfer-atas Bumi sehingga mengakibatkan terganggunya komunikasi radio. Oleh karena itu, prakiraan flare Matahari sangat penting untuk peringatan dini cuaca antariksa. Makalah ini bertujuan untuk mengembangkan sistem prakiraan flare sinar-X yang dihasilkan suatu daerah aktif untuk 24 jam ke depan berdasarkan masukan perubahan parameter dari daerah aktif selama tiga hari sebelum terjadinya flare, meliputi posisi lintang dan bujur heliografis, luas, jumlah bintik, dan kelas McIntosh dan Hale. Model prakiraan flare dikembangkan menggunakan algoritma random forest. Konfigurasi paling optimal yang digunakan dalam algoritma ini menghasilkan model prakiraan dengan akurasi sekitar 75% untukprakiraan kondisi tanpa-flare, sekitar 40-45% untuk prakiraan flare kelas C dan M, dan sekitar 80% untuk prakiraan flare kelas X. Konfigurasi 50 pohon dan 90 daun menghasilkan prakiraan flare sinar-X kelas ≥ C dengan akurasi data latih sebesar 71,9% dan F-score data uji sebesar 70,0%. Sementara itu, konfigurasi 500 pohon dan 150 daun menghasilkan prakiraan dengan akurasi data latih sebesar 71,0% dan F-score data uji sebesar 70,4%. Parameter fisis daerah aktif yang paling berkontribusi terhadap prakiraan flare adalah luas, kelas Hale, kelas McIntosh, jumlah bintik, dan posisi bujur dalam 24 dan 48 jam menjelang flare. Model prakiraan flare ini dapat digunakan untuk mendukung kegiatan SWIFtS yang telah beroperasi di LAPAN sejak tahun 2015.
PENGARUH FLARE DAN CORONAL MASS EJECTION (CME) TERHADAP INDEKS Dst GEOMAGNET DAN FoF2 IONOSFER DI ATAS TANJUNGSARI SUMEDANG Tiar Dani
Widyariset Vol 12, No 1 (2009): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.251 KB) | DOI: 10.14203/widyariset.12.1.2009.81-86

Abstract

This research was conducted to see the effect ofsolarflare and Coronal Mass Ejection (CME) on geomagnetic and ionosphere above Tanjungsari, Sumedang, West Java. By using Disturbance storm time (Dst) index data for geomagnetic disturbance parameter and critical frequency (fo) of F2 ionosphere layer data for ionosphere disturbance parameter; a graph was plotted between occurrence off lare and CME with Dst index andf oF2 from year 2000 to 2003. The result found thatf lare and CME affect disturbance on geomagnetic caused a geomagnetic storm and disturbance on ionosphere cause an ionosphere storm. Those storms were depended by flare class, CME type, and its position on the sun when they happened Flare and CME event that happened also required time to reach the Earth.   
Co-Authors Santi Sulistiani