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

Sep 30, 2025

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

Two main components of polar motion are Chandler wobble and annual wobble. Annual wobble is obviously caused by the seasonal perturbations on the Earth – such was suspected as well as readily confirmed in unison. Unlike annual wobble the cause of Chandler wobble has long been controversial, and finally solid proof came out with recent polar motion reconstruction using fluid spheres excitation data. In this study, certain characteristics of two main oscillatory components of polar motion are investigated once again. First, with two kinds of da...
Technical Paper

Sep 30, 2025

Establishment of a Mid-Latitude Neutron Monitoring Site at Mt. Gamak in Korea

Jongil Jung, Young-Sil Kwak, Jongdae Sohn, Suyeon Oh, Yu Yi, Yongkyun Kim, Seonghwan Choi, Paul Evenson

J. Astron. Space Sci. 2025;42(3):77-84.
https://doi.org/10.5140/JASS.2025.42.3.77

Cosmic ray neutron monitors (NMs) are ground-based detectors that measure secondary neutrons produced by primary cosmic ray particles in the energy range of approximately 500 MeV to several GeV. South Korea operates two NMs: one at Jang Bogo Station in Antarctica and another recently relocated from Daejeon to Mt. Gamak in Geochang, now managed by the Korea Astronomy and Space Science Institute (KASI). Mt. Gamak is geographically comparable to the former Daejeon site, located approximately 100 km to the southeast. The NM at Mt. Gamak’s altitud...

CURRENT ISSUE: Sep 2025, Vol. 42, No. 3

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

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Technical Paper

Establishment of a Mid-Latitude Neutron Monitoring Site at Mt. Gamak in Korea

Jongil Jung, Young-Sil Kwak, Jongdae Sohn, Suyeon Oh, Yu Yi, Yongkyun Kim, Seonghwan Choi, Paul Evenson

J. Astron. Space Sci. 2025;42(3):77-84.
https://doi.org/10.5140/JASS.2025.42.3.77

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