Jurnal Sains Dirgantara最新文献

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Jurnal Sains Dirgantara Pub Date : 2018-09-04 DOI: 10.30536/j.jsd.2018.v15.a3011

A. Nurlatifah

引用次数: 0

RELASI APROKSIMASI ANTARA DIAMETER KAWAH TUMBUKAN DI BUMI DAN UKURAN OBJEK PENUMBUK DARI SIMULASI NUMERIK

Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/J.JSD.2018.V15.A2909

J. Utama

引用次数: 0

BASIC LIFETIME MODEL FOR REENTRY TIME PREDICTION OF ARTIFICIAL SPACE OBJECTS 人造空间物体再入时间预测的基本寿命模型

Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/j.jsd.2018.v0.a2902

Abdul Rachman, R. Priyatikanto

{"title":"BASIC LIFETIME MODEL FOR REENTRY TIME PREDICTION OF ARTIFICIAL SPACE OBJECTS","authors":"Abdul Rachman, R. Priyatikanto","doi":"10.30536/j.jsd.2018.v0.a2902","DOIUrl":"https://doi.org/10.30536/j.jsd.2018.v0.a2902","url":null,"abstract":"The identification of space debris and the prediction of its orbital lifetime are two important things in the initial mitigation processes of threat from falling debris. As a part of the development of related decision support system, this study focuses on developing a basic lifetime model of artificial space object based on a well-known theory and prediction scheme in the field of satellite reentry research. Current implemented model has not accounted atmospheric oblateness or other correcting factors, but it has a reasonably good performance in predicting reentry time of several objects with various initial eccentricities. Among 30 predictions conducted to 10 objects that reentered the atmosphere from 1970 to 2012, there are 13 calculations that yield prediction time with accuracy of < 30% relative to the actual reentry time. In addition, 11 calculations yields prediction time which were more accurate compared to the outputs from SatEvo software that is currently used in the decision support system on the falling debris operated by Space Science Center LAPAN. These results were considered satisfying and can be developed further by adopting the updated atmospheric model and by calculating other relevant correcting factors.","PeriodicalId":122664,"journal":{"name":"Jurnal Sains Dirgantara","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132878444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The use of satellite beacon TEC data from GRBR campaign-based observations for ionosphere tomography over West Java Indonesia 利用GRBR运动观测的卫星信标TEC数据进行印度尼西亚西爪哇电离层层析成像

Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/j.jsd.2018.v15.a2896

T. Manik

{"title":"The use of satellite beacon TEC data from GRBR campaign-based observations for ionosphere tomography over West Java Indonesia","authors":"T. Manik","doi":"10.30536/j.jsd.2018.v15.a2896","DOIUrl":"https://doi.org/10.30536/j.jsd.2018.v15.a2896","url":null,"abstract":"The experiment of ionospheric tomographic reconstruction using satellite beacon TEC data from two or more adjacent GRBR observation stations following equatorial latitude and longitude have been conducted on campaign-based observation in Sumedang, Pameungpeuk and Indramayu West Java on 2016 and 2017. The reconstruction technique utilized is a simple algebraic reconstruction technique (ART). The result obtained is the ionosphere electron density distribution along the longitude of 108 degrees East over the area of West Java and Indonesia. The ionosphere electron density parameters obtained from the IRI-2012 Model were used as the initiation to construct ionospheric tomographic reconstruction. The validation performed by correlating foF2 from the ionospheric tomographic reconstruction with foF2 obtained from ionosonde observation at Sumedang station, one of the GRBR observation sites shows that corresponded to the correlation coefficient value of 0.8665, with a bias frequency of 1.386 MHz, whereas the correlation with the maximum electron density value obtained from the IRI-2016 model gives a correlation coefficient value of 0.8958. a bias frequency of 1.386 MHz, whereas the correlation with the maximum electron density value obtained from the IRI-2016 model gives a correlation coefficient value of 0.8958. ","PeriodicalId":122664,"journal":{"name":"Jurnal Sains Dirgantara","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131829074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pengaruh Central Pacific dan eastern Pacific El Nino terhadap variabilitas curah hujan di Sulawesi

Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/J.JSD.2018.V15.A2864

Budi Prasetyo, Nikita Pusparini

{"title":"Pengaruh Central Pacific dan eastern Pacific El Nino terhadap variabilitas curah hujan di Sulawesi","authors":"Budi Prasetyo, Nikita Pusparini","doi":"10.30536/J.JSD.2018.V15.A2864","DOIUrl":"https://doi.org/10.30536/J.JSD.2018.V15.A2864","url":null,"abstract":"Pulau Sulawesi dipengaruhi oleh fenomena Central Pacific (CP) dan Eastern Pacific (EP) El Niño. Curah hujan Sulawesi mencakup ketiga pola hujan yang ada di Indonesia yaitu Monsunal, equatorial, dan lokal. Variabilitas ketiga pola curah hujan tersebut akan memberikan respon yang berbeda terhadap pengaruh dari kedua tipe El Niño tersebut. Maka, Kajian ini akan membahas pengaruh dari kedua tipe El Niño terhadap curah hujan Sulawesi. Penelitian ini Menggunakan data curah hujan bulanan berasal dari Climate Prediction Center (CPC) National Oceanic and Atmospheric Administration (NOAA), Suhu Permukaan Laut (SPL) bulanan dari System Ocean Data Assimilation (SODA) versi 2.2.4 dan oceanic Niño Indeks (ONI) dengan periode Januari 1950 hingga Desember 2010 (60 tahun). Perhitungan statistik sederhana berupa perata-rataan, korelasi, dan analisa komposit digunakan dalam kajian ini. Penentuan tipe El Niño menggunakan tiga buah indeks yang berbeda. Hasilnya diperoleh bahwa Curah hujan Sulawesi berkurang saat kedua tipe El Niño. Penurunan curah hujan akibat EP El Niño berkisar antara 5 – 20 mm sedangkan akibat CP El Niño berkisar antara 2-12 mm. Wilayah Sulawesi dengan pola curah hujan monsunal merupakan wilayah yang mengalami penurunan curah hujan terbesar akibat kedua tipe El Niño tersebut, kemudian diikuti dengan pola curah hujan equatorial dan terakhir Lokal.","PeriodicalId":122664,"journal":{"name":"Jurnal Sains Dirgantara","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125464990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

EVALUASI PEMETAAN POTENSI ENERGI SURYA BERBASIS MODEL WRF DI DESA PALIHAN DAN DESA AIKANGKUNG 在PALIHAN和AIKANGKUNG村，以WRF为基础的太阳能势导评价

Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/j.jsd.2018.v15.a2521

B. Pranoto, Dian Galuh Cendrawati, Nurry Widya Hesty, Errie Kusriadie

引用次数: 4

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Jurnal Sains Dirgantara Pub Date : 2018-09-03 DOI: 10.30536/j.jsd.2018.v15.a3009

A. Nurlatifah

引用次数: 0