Journal of Astronomy and Space Sciences最新文献_第8页

Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method 用地心拉普拉斯法测定轨道元和星历表

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-09-01 DOI: 10.5140/JASS.2020.37.3.171

Daniela Espitia, E. Quintero, I. D. Arellano-Ramírez

{"title":"Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s\u0000 Method","authors":"Daniela Espitia, E. Quintero, I. D. Arellano-Ramírez","doi":"10.5140/JASS.2020.37.3.171","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.3.171","url":null,"abstract":"This paper presents a methodology for Initial Orbit Determination (IOD) based on\u0000 a modification of the Laplace’s geocentric method. The orbital elements for Near-Earth\u0000 asteroids (1864) Daedalus, 2003 GW, 2019 JA8, a Hungaria-type asteroid (4690)\u0000 Strasbourg, and the asteroids of the Main Belt (1738) Oosterhoff, (2717) Tellervo,\u0000 (1568) Aisleen and (2235) Vittore were calculated. Input data observations from the\u0000 Minor Planet Center MPC database and Astronomical Observatory of the Technological\u0000 University of Pereira (OAUTP; MPC code W63) were used. These observations cover\u0000 observation arcs of less than 22 days. The orbital errors, in terms of shape and\u0000 orientation for the estimated orbits of the asteroids, were calculated. The shape error\u0000 was less than 53 × 10–3 AU, except for the asteroid 2019 JA8. On the other hand, errors\u0000 in orientation were less than 0.1 rad, except for (4690) Strasbourg. Additionally, we\u0000 estimated ephemerides for all bodies for up to two months. When compared with actual\u0000 ephemerides, the errors found allowed us to conclude that these bodies can be recovered\u0000 in a field of vision of 95’ × 72’ (OAUTP field). This shows that Laplace’s method,\u0000 though simple, may still be useful in the IOD study, especially for observatories that\u0000 initiate programs of minor bodies observation.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"100 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91142154","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: 3

The Chemical Composition of V1719 Cyg: δ Scuti Type Star without the Accretion of Interstellar Matter 没有星际物质吸积的V1719 Cyg: δ Scuti型恒星的化学成分

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-09-01 DOI: 10.5140/JASS.2020.37.3.157

A. Yushchenko, Chulhee Kim, Yeuncheol Jeong, D. Doikov, V. Yushchenko, S. V. Khrapatyi, A. Demessinova

引用次数: 0

A Development of Docking Phase Analysis Tool for Nanosatellite 纳米卫星对接相位分析工具的研制

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-09-01 DOI: 10.5140/JASS.2020.37.3.187

Mi-Jin Jeong, D. Cho, Hae-Dong Kim

引用次数: 0

Development of Kinematic Ephemeris Generator for Korea Pathfinder Lunar Orbiter (KPLO) 韩国探路者月球轨道器(KPLO)运动星历发生器的研制

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-09-01 DOI: 10.5140/JASS.2020.37.3.199

Min-Sup Song, Sang-Young Park, Youngkwang Kim, J. Yim

{"title":"Development of Kinematic Ephemeris Generator for Korea Pathfinder Lunar Orbiter\u0000 (KPLO)","authors":"Min-Sup Song, Sang-Young Park, Youngkwang Kim, J. Yim","doi":"10.5140/JASS.2020.37.3.199","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.3.199","url":null,"abstract":"This paper presents a kinematic ephemeris generator for Korea Pathfinder Lunar\u0000 Orbiter (KPLO) and its performance test results. The kinematic ephemeris generator\u0000 consists of a ground ephemeris compressor and an onboard ephemeris calculator. The\u0000 ground ephemeris compressor has to compress desired orbit propagation data by using an\u0000 interpolation method in a ground system. The onboard ephemeris calculator can generate\u0000 spacecraft ephemeris and the Sun/Moon ephemeris in onboard computer of the KPLO. Among\u0000 many interpolation methods, polynomial interpolation with uniform node, Chebyshev\u0000 interpolation, Hermite interpolation are tested for their performances. As a result of\u0000 the test, it is shown that all the methods have some cases that meet requirements but\u0000 there are some performance differences. It is also confirmed that, the Chebyshev\u0000 interpolation shows better performance than other methods for spacecraft ephemeris\u0000 generation, and the polynomial interpolation with uniform nodes yields good performance\u0000 for the Sun/Moon ephemeris generation. Based on these results, a Kinematic ephemeris\u0000 generator is developed for the KPLO mission. Then, the developed ephemeris generator can\u0000 find an approximating function using interpolation method considering the size and\u0000 accuracy of the data to be transmitted.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"20 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82609570","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

A Development of Satellite Communication Link Analysis Tool 卫星通信链路分析工具的研制

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.117

S. Ayana, Seongmin Lim, D. Cho, Hae-Dong Kim

{"title":"A Development of Satellite Communication Link Analysis Tool","authors":"S. Ayana, Seongmin Lim, D. Cho, Hae-Dong Kim","doi":"10.5140/JASS.2020.37.2.117","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.2.117","url":null,"abstract":"In a Satellite communication system, a link budget analysis is the detailed\u0000 investigation of signal gains and losses moving through a channel from a sender to\u0000 receiver. It inspects the fading of passed on data signal waves due to the process of\u0000 spreading or propagation, including transmitter and receiver antenna gains, feeder\u0000 cables, and related losses. The extent of the proposed tool is to make an effective,\u0000 efficient, and user-friendly approach to calculate link budget analysis. It is also\u0000 related to the satellite communication correlation framework by building up a graphical\u0000 interface link analysis tool utilizing STK® software with the interface of C#\u0000 programming. It provides better kinds of graphical display techniques, exporting and\u0000 importing data files, printing link information, access data, azimuth-elevation-range\u0000 (AER), and simulation is also possible at once. The components of the link budget\u0000 analysis tool include transmitter gain, effective isotropic radiated power (EIRP), free\u0000 space loss, propagation loss, frequency Doppler shift, flux density, link margin,\u0000 elevation plot, etc. This tool can be useful for amateur users (e.g., CubeSat developers\u0000 in the universities) or nanosat developers who may not know about the RF communication\u0000 system of the satellite and the orbital mechanics (e.g., orbit propagators) principle\u0000 used in the satellite link analysis.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"16 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77066634","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

Linear Instability and Saturation Characteristics of Magnetosonic Waves along the Magnetic Field Line 磁声波沿磁力线的线性不稳定性和饱和特性

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.85

K. Min, Kaijun Liu

{"title":"Linear Instability and Saturation Characteristics of Magnetosonic Waves along the\u0000 Magnetic Field Line","authors":"K. Min, Kaijun Liu","doi":"10.5140/JASS.2020.37.2.85","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.2.85","url":null,"abstract":"Equatorial noise, also known magnetosonic waves (MSWs), are one of the frequently\u0000 observed plasma waves in Earth’s inner magnetosphere. Observations have shown that wave\u0000 amplitudes maximize at the magnetic equator with a narrow extent in their latitudinal\u0000 distribution. It has been understood that waves are generated from an equatorial source\u0000 region and confined within a few degrees magnetic latitude. The present study\u0000 investigates whether the MSW instability and saturation amplitudes maximize at the\u0000 equator, given an energetic proton ring-like distribution derived from an observed wave\u0000 event, and using linear instability analysis and particle-in-cell simulations with the\u0000 plasma conditions at different latitudes along the dipole magnetic field line. The\u0000 results show that waves initially grow fastest (i.e., with the largest growth rate) at\u0000 high latitude (20°–25°), but consistent with observations, their saturation amplitudes\u0000 maximize within ±10° latitude. On the other hand, the slope of the saturation amplitudes\u0000 versus latitude revealed in the present study is not as steep as what the previous\u0000 statistical observation results suggest. This may be indicative of some other factors\u0000 not considered in the present analyses at play, such as background magnetic field and\u0000 plasma inhomogeneities and the propagation effect.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"108 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82289161","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: 2

Creating and Transforming a Second-Rank Antisymmetric Field-Strength Tensor Fαβ in Minkowski Space using MATHEMATICA 利用MATHEMATICA在Minkowski空间中建立和变换二阶反对称场强张量f - αβ

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.131

Bogyeong Kim, H. Yun

引用次数: 0

Observations of the Polar Ionosphere by the Vertical Incidence Pulsed Ionospheric Radar at Jang Bogo Station, Antarctica 南极张伯果站垂直入射脉冲电离层雷达对极地电离层的观测

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.143

Young-bae Ham, G. Jee, Changsup Lee, H. Kwon, Jeong‐Han Kim, N. Zabotin, T. Bullett

{"title":"Observations of the Polar Ionosphere by the Vertical Incidence Pulsed Ionospheric\u0000 Radar at Jang Bogo Station, Antarctica","authors":"Young-bae Ham, G. Jee, Changsup Lee, H. Kwon, Jeong‐Han Kim, N. Zabotin, T. Bullett","doi":"10.5140/JASS.2020.37.2.143","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.2.143","url":null,"abstract":"Korea Polar Research Institute (KOPRI) installed an ionospheric sounding radar\u0000 system called Vertical Incidence Pulsed Ionospheric Radar (VIPIR) at Jang Bogo Station\u0000 (JBS) in 2015 in order to routinely monitor the state of the ionosphere in the auroral\u0000 oval and polar cap regions. Since 2017, after two-year test operation, it has been\u0000 continuously operated to produce various ionospheric parameters. In this article, we\u0000 will introduce the characteristics of the JBS-VIPIR observations and possible\u0000 applications of the data for the study on the polar ionosphere. The JBS-VIPIR utilizes a\u0000 log periodic transmit antenna that transmits 0.5–25 MHz radio waves, and a receiving\u0000 array of 8 dipole antennas. It is operated in the Dynasonde B-mode pulse scheme and\u0000 utilizes the 3-D inversion program, called NeXtYZ, for the data acquisition and\u0000 processing, instead of the conventional 1-D inversion procedure as used in the most of\u0000 digisonde observations. The JBS-VIPIR outputs include the height profiles of the\u0000 electron density, ionospheric tilts, and ion drifts with a 2-minute temporal resolution\u0000 in the bottomside ionosphere. With these observations, possible research applications\u0000 will be briefly described in combination with other observations for the aurora, the\u0000 neutral atmosphere and the magnetosphere simultaneously conducted at JBS.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"52 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89469514","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: 14

Space Surveillance Radar Observation Analysis: One-Year Tracking and Orbit Determination Results of KITSAT-1, “우리별 1호” 空间监视雷达观测分析:KITSAT-1“k”一年跟踪定轨结果

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.105

Jin Choi, J. Jo, E. Choi, Jiwoong Yu, Byung-Kyu Choi, Myung-Jin Kim, H. Yim, D. Roh, Sooyoung Kim, Jang-Hyun Park, Sungki Cho

{"title":"Space Surveillance Radar Observation Analysis: One-Year Tracking and Orbit\u0000 Determination Results of KITSAT-1, “우리별 1호”","authors":"Jin Choi, J. Jo, E. Choi, Jiwoong Yu, Byung-Kyu Choi, Myung-Jin Kim, H. Yim, D. Roh, Sooyoung Kim, Jang-Hyun Park, Sungki Cho","doi":"10.5140/JASS.2020.37.2.105","DOIUrl":"https://doi.org/10.5140/JASS.2020.37.2.105","url":null,"abstract":"The Korean Institute of Technology Satellite (KITSAT-1) is the first satellite\u0000 developed by the Satellite Technology Research Center and the University of Surrey.\u0000 KITSAT-1 is orbiting the Earth’s orbit as space debris with a 1,320 km altitude after\u0000 the planned mission. Due to its relatively small size and altitude, tracking the\u0000 KITSAT-1 was a difficult task. In this research, we analyzed the tracking results of\u0000 KITSAT-1 for one year using the Midland Space Radar (MSR) in Texas and the Poker Flat\u0000 Incoherent Scatter Radar (PFISR) in Alaska operated by LeoLabs, Inc. The tracking\u0000 results were analyzed on a weekly basis for MSR and PFISR. The observation was conducted\u0000 by using both stations at an average frequency of 10 times per week. The overall\u0000 corrected range measurements for MSR and PFISR by LeoLabs were under 50 m and 25 m,\u0000 respectively. The ionospheric delay, the dominant error source, was confirmed with the\u0000 International Reference of Ionosphere-16 model and Global Navigation Satellite System\u0000 data. The weekly basis orbit determination results were compared with two-line element\u0000 data. The comparison results were used to confirm the orbital consistency of the\u0000 estimated orbits.","PeriodicalId":44366,"journal":{"name":"Journal of Astronomy and Space Sciences","volume":"106 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80828311","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

Global MHD Simulation of a Prolonged Steady Weak Southward Interplanetary Magnetic Field Condition 长时间稳定弱向南行星际磁场条件的全球MHD模拟

IF 0.5

Journal of Astronomy and Space Sciences Pub Date : 2020-06-01 DOI: 10.5140/JASS.2020.37.2.77

K. Park, Dae‐Young Lee, Khan‐Hyuk Kim

引用次数: 2