Journal of Astronomy and Space Sciences

About Journal of Astronomy and Space Sciences

The Journal of Astronomy and Space Sciences (JASS; J. Astron. Space Sci.) is the official publication of the Korean Space Science Society (KSSS), the most prestigious academic society in the fields of space science and space applications in Korea. JASS is an international journal devoted to the publication of fundamental and applied investigations in all aspects of spacerelated science and technology. It was launched in 1984 and is published quarterly. Each article published is assigned a unique DOI that serves to identify the article in the digital environment. JASS is an open access journal; consequently, the full texts of articles are free for all users to read and use. The papers published in JASS are accessible on the journal homepage (http://janss.kr), the DOAJ website, and the SAO/NASA ADS website. JASS has been indexed by KCI and SCOPUS since 2007 and 2012, respectively. Additionally, JASS was re-indexed by DOAJ and newly indexed in the ESCI (Emerging Sources Citation Index) by Clarivate Analytics in 2017. This journal is supported in part by a Grant-in-Aid for the publication of scientific research from the Korean Federation of Science and Technology Societies (KOFST).
Research Paper

Jun 15, 2026

Revisit Time Analysis Framework of Low Earth Orbit Constellation for Various Payloads using MATLAB

Hongseok Kim, Su-Jin Choi

J. Astron. Space Sci. 2026;43(2):35-53.
https://doi.org/10.5140/JASS.2026.43.2.35

In this study, we present analysis of revisit-time characteristics of low Earth orbit (LEO) satellite constellations intended for Earth observation missions. The objective of this work is to evaluate and compare the revisit-time performance of heterogeneous payloads—including automatic identification system (AIS), electro-optic/infra-red (EO/IR), synthetic aperture radar (SAR), and radio-frequency (RF) sensors—operating over a common region of interest near the Korean Peninsula. To address this problem, we construct a constellation simulati...
Research Paper

Jun 15, 2026

Research on Initial Orbit Determination of Near-Circular Orbit Space Objects Based on the Admissible Region Method

Yewen Yin, Zhenwei Li, Zhe Kang, Wenbo Yang, Jiannan Sun

J. Astron. Space Sci. 2026;43(2):55-70.
https://doi.org/10.5140/JASS.2026.43.2.55

Under space-based angle-only observations, the admissible region (AR) algorithm often yields erroneous solutions in initial orbit determination (IOD) for near-circular orbit objects. This paper analyzes the mechanism generating these erroneous solutions and proposes a suppression method based on screening multi-direction solution sets using dispersion analysis. The study first points out that, under near-circular orbit constraints, the traditional AR algorithm, due to specific relative geometric configurations between the platform and the objec...
Research Paper

Jun 15, 2026

Image-Based Star Detection and Centroid Estimation: Initial Exploration of Lunar Navigation Systems

Anis Hannani Razaman, Yasser Asrul Ahmad

J. Astron. Space Sci. 2026;43(2):71-82.
https://doi.org/10.5140/JASS.2026.43.2.71

Accurate star detection and centroiding are critical for attitude determination in space missions, especially under challenging environments like the lunar surface. This study presents an enhanced centroiding algorithm designed to improve robustness and accuracy in the presence of noise. The method incorporates thresholding and intensity-weighted centroid calculations, optimized through testing on synthetic star images affected by Salt-and-Pepper and Gaussian noise. Validation is conducted via affine transformation and star matching with a know...
Research Paper

Jun 15, 2026

Inter-Hemispheric Comparison of Meteor Decay Time and Its Derived Parameters at 68° Latitudes

Sangadeep Borukote, Chenna Reddy Kammadhanam

J. Astron. Space Sci. 2026;43(2):83-92.
https://doi.org/10.5140/JASS.2026.43.2.83

The decay time of underdense meteor echoes is highly sensitive to background atmospheric conditions in the mesosphere and lower thermosphere (MLT)-region. Using long-term observations from two identical SKiYMET meteor radars located at conjugate polar latitudes, Esrange (68°N, 21°E, 2005–2022) and Rothera (68°S, 68°W, 2005–2024), we examine the inter-hemispheric similarities and differences in meteor decay time and decay time derived atmospheric parameters. The analysis reveals strong hemispheric resemblance in the seasonal evolution ...
Research Paper

Jun 15, 2026

GNSS Analysis of the Ionospheric Response to the Extreme Geomagnetic Storm of May 11, 2024: Latitudinal Dependence of VTEC

Karim Guibula, Abidina Diabate, Moumouni Diallo

J. Astron. Space Sci. 2026;43(2):93-101.
https://doi.org/10.5140/JASS.2026.43.2.93

This study examines the ionospheric response to the extreme geomagnetic storm of May 11, 2024, (Dst ≈ −400 nT) using GNSS derived vertical total electron content (VTEC) from four stations distributed from northern mid-latitudes to southern low latitude. Disturbances are quantified using the relative deviation parameter (ΔVTEC) and interpreted together with GUVI/TIMED thermospheric O/N2 ratio maps. The results highlight a strong latitudinal dependence and a clear spatiotemporal evolution. At northern mid-latitudes, intense and prolonged n...
Technical Paper

Jun 15, 2026

In-Orbit Temperature Calibration of Long-Term Korea Pathfinder Lunar Orbiter Magnetometer Data

Yesun Ahn, Ho Jin, Hyeonhu Park, Yunho Jang, Wooin Jo, Seul-Min Baek, Jehyuck Shin

J. Astron. Space Sci. 2026;43(2):103-116.
https://doi.org/10.5140/JASS.2026.43.2.103

The Korea Pathfinder Lunar Orbiter (KPLO) magnetometer (KMAG) is a triaxial racetrack fluxgate magnetometer with a 1.2-meter-long boom for the KPLO mission. Previous studies on KMAG data processing and calibration have demonstrated that the quality of processed data is sufficient for general scientific research. However, additional calibration is necessary to remove residual noise fields that make it difficult to distinguish small-amplitude signals. As some magnetic interferences induced by the space environment are not fully covered by ground-...

CURRENT ISSUE: Jun 2026, Vol. 43, No. 2

Research Paper Revisit Time Analysis Framework of Low Earth Orbit Constellation for Various Payloads using MATLAB Hongseok Kim, Su-Jin Choi J. Astron. Space Sci. 2026;43(2):35-53. https://doi.org/10.5140/JASS.2026.43.2.35 HTML PDF PubReader	Research Paper Research on Initial Orbit Determination of Near-Circular Orbit Space Objects Based on the Admissible Region Method Yewen Yin, Zhenwei Li, Zhe Kang, Wenbo Yang, Jiannan Sun J. Astron. Space Sci. 2026;43(2):55-70. https://doi.org/10.5140/JASS.2026.43.2.55 HTML PDF PubReader
Research Paper Image-Based Star Detection and Centroid Estimation: Initial Exploration of Lunar Navigation Systems Anis Hannani Razaman, Yasser Asrul Ahmad J. Astron. Space Sci. 2026;43(2):71-82. https://doi.org/10.5140/JASS.2026.43.2.71 HTML PDF PubReader	Research Paper Inter-Hemispheric Comparison of Meteor Decay Time and Its Derived Parameters at 68° Latitudes Sangadeep Borukote, Chenna Reddy Kammadhanam J. Astron. Space Sci. 2026;43(2):83-92. https://doi.org/10.5140/JASS.2026.43.2.83 HTML PDF PubReader
Research Paper GNSS Analysis of the Ionospheric Response to the Extreme Geomagnetic Storm of May 11, 2024: Latitudinal Dependence of VTEC Karim Guibula, Abidina Diabate, Moumouni Diallo J. Astron. Space Sci. 2026;43(2):93-101. https://doi.org/10.5140/JASS.2026.43.2.93 HTML PDF PubReader	Technical Paper In-Orbit Temperature Calibration of Long-Term Korea Pathfinder Lunar Orbiter Magnetometer Data Yesun Ahn, Ho Jin, Hyeonhu Park, Yunho Jang, Wooin Jo, Seul-Min Baek, Jehyuck Shin J. Astron. Space Sci. 2026;43(2):103-116. https://doi.org/10.5140/JASS.2026.43.2.103 HTML PDF PubReader

MOST READ ARTICLES

Review Paper Challenges to Space Activities in the Context of Mega Satellite Constellations: A Focus on Environmental Impacts Sheer Abbas J. Astron. Space Sci. 2025;42(1):1-13. https://doi.org/10.5140/JASS.2025.42.1.1 HTML PDF PubReader Last 3 months views: 6335	Research Paper Analysis of Solar and Lunar Motions in the Seonmyeong Calendar Ki-Won Lee Journal of Astronomy and Space Sciences 2019;36(2):87-96. https://doi.org/10.5140/JASS.2019.36.2.87 HTML PDF PubReader Last 3 months views: 5774
Research Paper Observational Overview of the May 2024 G5-Level Geomagnetic Storm: From Solar Eruptions to Terrestrial Consequences Young-Sil Kwak, Jeong-Heon Kim, Sujin Kim, Yukinaga Miyashita, Taeyong Yang, Sung-Hong Park, Eun-Kyung Lim, Jongil Jung, Hosik Kam, Jaewook Lee, Hwanhee Lee, Ji-Hyun Yoo, Haein Lee, Ryun-Young Kwon, Jungjoon Seough, Uk-Won Nam, Woo Kyoung Lee, Junseok Hong, Jongdae Sohn, Jaeyoung Kwak, Hannah Kwak, Rok-Soon Kim, Yeon-Han Kim, Kyung-Suk Cho, Jaeheung Park, Jaejin Lee, Hoang Ngoc Huy Nguyen, Madeeha Talha J. Astron. Space Sci. 2024;41(3):171-194. https://doi.org/10.5140/JASS.2024.41.3.171 HTML PDF PubReader Last 3 months views: 4878	Research Paper Luminance Within Lunar Permanently Shadowed Regions Robert Vernon Wagner, Mark Southwick Robinson J. Astron. Space Sci. 2025;42(4):97-118. https://doi.org/10.5140/JASS.2025.42.4.97 HTML PDF PubReader Last 3 months views: 4252
Research Paper Main Oscillatory Polar Motion of the Earth and Its Excitation: Investigation in Both the Frequency and Time Domains Sung-Ho Na, Yu Yi J. Astron. Space Sci. 2025;42(3):63-76. https://doi.org/10.5140/JASS.2025.42.3.63 HTML PDF PubReader Last 3 months views: 3987	Research Paper Design of Regional Coverage Low Earth Orbit (LEO) Constellation with Optimal Inclination Jinyoung Shin, Sang-Young Park, Jihae Son, Sung-Chan Song Journal of Astronomy and Space Sciences 2021;38(4):217-227. https://doi.org/10.5140/JASS.2021.38.4.217 HTML PDF PubReader Last 3 months views: 3558
Technical Paper Initial Results of Low Earth Orbit Space Radiation Dosimeter on Board the Next Generation Small Satellite-2 Uk-Won Nam, Won-Kee Park, Sukwon Youn, Jaeyoung Kwak, Jongdae Sohn, Bongkon Moon, Jaejin Lee, Young-Jun Choi, Jungho Kim, Sunghwan Kim, Hongjoo Kim, Hwanbae Park, Sung-Joon Ye, Hongyoung Park, Taeseong Jang J. Astron. Space Sci. 2024;41(3):195-208. https://doi.org/10.5140/JASS.2024.41.3.195 HTML PDF PubReader Last 3 months views: 3070	Research Paper Titius-Bode’s Relation in Exoplanetary Systems Heon-Young Chang J. Astron. Space Sci. 2023;40(2):67-77. https://doi.org/10.5140/JASS.2023.40.2.67 HTML PDF PubReader Last 3 months views: 2977
Research Paper A Study on Re-entry Predictions of Uncontrolled Space Objects for Space Situational Awareness Eun-Jung Choi, Sungki Cho, Deok-Jin Lee, Siwoo Kim, Jung Hyun Jo Journal of Astronomy and Space Sciences 2017;34(4):289-302. https://doi.org/10.5140/JASS.2017.34.4.289 HTML PDF PubReader Last 3 months views: 2960	Research Paper Trends of Solar, Interplanetary, and Geomagnetic Parameters during the Recent Five Solar Cycles Myunghwan Kim, Suyeon Oh J. Astron. Space Sci. 2025;42(1):29-37. https://doi.org/10.5140/JASS.2025.42.1.29 HTML PDF PubReader Last 3 months views: 2532

MOST CITED ARTICLES

Research Paper Observational Overview of the May 2024 G5-Level Geomagnetic Storm: From Solar Eruptions to Terrestrial Consequences Young-Sil Kwak, Jeong-Heon Kim, Sujin Kim, Yukinaga Miyashita, Taeyong Yang, Sung-Hong Park, Eun-Kyung Lim, Jongil Jung, Hosik Kam, Jaewook Lee, Hwanhee Lee, Ji-Hyun Yoo, Haein Lee, Ryun-Young Kwon, Jungjoon Seough, Uk-Won Nam, Woo Kyoung Lee, Junseok Hong, Jongdae Sohn, Jaeyoung Kwak, Hannah Kwak, Rok-Soon Kim, Yeon-Han Kim, Kyung-Suk Cho, Jaeheung Park, Jaejin Lee, Hoang Ngoc Huy Nguyen, Madeeha Talha J. Astron. Space Sci. 2024;41(3):171-194. https://doi.org/10.5140/JASS.2024.41.3.171 HTML PDF PubReader Cited by 63	Technical Paper ShadowCam Instrument and Investigation Overview Mark Southwick Robinson, Scott Michael Brylow, Michael Alan Caplinger, Lynn Marie Carter, Mattew John Clark, Brett Wilcox Denevi, Nicholas Michael Estes, David Carl Humm, Prasun Mahanti, Douglas Arden Peckham, Michael Andrew Ravine, Jacob Andrieu Schaffner, Emerson Jacob Speyerer, Robert Vernon Wagner J. Astron. Space Sci. 2023;40(4):149-171. https://doi.org/10.5140/JASS.2023.40.4.149 HTML PDF PubReader Cited by 35
Research Paper A Study on Re-entry Predictions of Uncontrolled Space Objects for Space Situational Awareness Eun-Jung Choi, Sungki Cho, Deok-Jin Lee, Siwoo Kim, Jung Hyun Jo J. Astron. Space Sci. 2017;34(4):289-302. https://doi.org/10.5140/JASS.2017.34.4.289 HTML PDF PubReader Cited by 27	Technical Paper Ground Tracking Support Condition Effect on Orbit Determination for Korea Pathfinder Lunar Orbiter (KPLO) in Lunar Orbit Young-Rok Kim, Young-Joo Song, Jae-ik Park, Donghun Lee, Jonghee Bae, SeungBum Hong, Dae-Kwan Kim, Sang-Ryool Lee J. Astron. Space Sci. 2020;37(4):237-247. https://doi.org/10.5140/JASS.2020.37.4.237 HTML PDF PubReader Cited by 18
Research Paper Performance Analysis of DPSK Optical Communication for LEO-to-Ground Relay Link Via a GEO Satellite Hyung-Chul Lim, Jong Uk Park, Mansoo Choi, Chul-Sung Choi, Jae-Dong Choi, Jongah Kim J. Astron. Space Sci. 2020;37(1):11-18. https://doi.org/10.5140/JASS.2020.37.1.11 HTML PDF PubReader Cited by 17	Technical Paper Observations of the Polar Ionosphere by the Vertical Incidence Pulsed Ionospheric Radar at Jang Bogo Station, Antarctica Young-Bae Ham, Geonhwa Jee, Changsup Lee, Hyuk-Jin Kwon, Jeong-Han Kim, Nikolay Zabotin, Terence Bullett J. Astron. Space Sci. 2020;37(2):143-156. https://doi.org/10.5140/JASS.2020.37.2.143 HTML PDF PubReader Cited by 15
Technical Paper Installation of Neutron Monitor at the Jang Bogo Station in Antarctica Jongil Jung, Suyeon Oh, Yu Yi, Paul Evenson, Roger Pyle, Geonhwa Jee, Jeong-Han Kim, Changsup Lee, Jongdae Sohn J. Astron. Space Sci. 2016;33(4):345-348. https://doi.org/10.5140/JASS.2016.33.4.345 HTML PDF PubReader Cited by 14	Research Paper Preliminary Characterization of Secondary Illumination at Shackleton Crater Permanently Shadowed Region from ShadowCam Observations and Modeling Prasun Mahanti, Mark Southwick Robinson, David Carl Humm, Robert Vernon Wagner, Nicholas Michael Estes, Jean-Pierre Williams J. Astron. Space Sci. 2023;40(4):131-148. https://doi.org/10.5140/JASS.2023.40.4.131 HTML PDF PubReader Cited by 14
Research Paper Performance Analysis of Sensor Systems for Space Situational Awareness Eun-Jung Choi, Sungki Cho, Jung Hyun Jo, Jang-Hyun Park, Taejin Chung, Jaewoo Park, Hocheol Jeon, Ami Yun, Yonghui Lee J. Astron. Space Sci. 2017;34(4):303-313. https://doi.org/10.5140/JASS.2017.34.4.303 HTML PDF PubReader Cited by 13	Research Paper Seasonal and local time variations of sporadic E layer over South Korea Eunbyeol Jo, Yong Ha Kim, Suin Moon, Young-Sil Kwak J. Astron. Space Sci. 2019;36(2):61-68. https://doi.org/10.5140/JASS.2019.36.2.61 HTML PDF PubReader Cited by 13