Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Sung-Moon Yoo"'
Autor:
Sung-Ho Na, Wenbin Shen, Jungho Cho, Kiweon Seo, Young-Hong Shin, Kwan-Dong Park, Kookyoun Youm, Sung-Moon Yoo
Publikováno v:
Geodesy and Geodynamics, Vol 10, Iss 1, Pp 37-41 (2019)
The global oceanic/atmospheric tides exert decelerating/accelerating secular torques on the Earth rotation. We developed new formulations to accurately calculate amounts of two kinds of secular tidal torques. After Melchior, we found that an addition
Externí odkaz:
https://doaj.org/article/e2b20957a03c4ae78b56864cfa0b0be1
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 4, Pp 245-250 (2017)
As a part of collaborative efforts to understand ionospheric irregularities, the Korea ionospheric scintillation sites (KISS) network has been built based on global positioning system (GPS) receivers with sampling rates higher than 1 Hz. We produce t
Externí odkaz:
https://doaj.org/article/6f45c10f91b448ce88f3086e9e02486a
Autor:
Sung-Ho Na, Jungho Cho, Tu-Hwan Kim, Kiweon Seo, Kookhyoun Youm, Sung-Moon Yoo, Byungkyu Choi, Hasu Yoon
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 33, Iss 4, Pp 295-304 (2016)
The atmosphere strongly affects the Earth’s spin rotation in wide range of timescale from daily to annual. Its dominant role in the seasonal perturbations of both the pole position and spinning rate of the Earth is once again confirmed by a compa
Externí odkaz:
https://doaj.org/article/2429f0495aa443ddbd7cdd237f24f1cb
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 33, Iss 4, Pp 287-293 (2016)
The equatorial region of the Earth’s ionosphere exhibits large temporal variations in electron density that have significant implications on satellite signal transmissions. In this paper, the first observation results of the variations in the troug
Externí odkaz:
https://doaj.org/article/38182d72566a4f8f80843b80762ac5b0
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 30, Iss 3, Pp 207-212 (2013)
Ionosphere is one of the largest error sources when the navigational signals produced by Global Positioning System (GPS) satellites are transmitted. Therefore it is very important to estimate total electron contents (TEC) in ionosphere precisely fo
Externí odkaz:
https://doaj.org/article/da12b9f6f51842f29ae926513c7901aa
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 30, Iss 1, Pp 33-41 (2013)
Various features of the existing perturbations in the Earth’s spin rotation are investigated for the recent and most reliable data by spectral analysis, filtering, and comparison with idealized model. First, theory of Earth’s spin rotational pert
Externí odkaz:
https://doaj.org/article/cf10dcfd2e5745498e503f4ab60c3052
Autor:
Sung-Moon Yoo, Sang-Young Park
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 28, Iss 4, Pp 285-290 (2011)
This paper presents an algorithm that can provide initial conditions for formation flying at the beginning of a region of interest to maximize scientific mission goals in the case of a tetrahedral satellite formation. The performance measure is to
Externí odkaz:
https://doaj.org/article/ca529c991da343bf80206b40e174c746
Autor:
Young-Joo Song, Sung-Moon Yoo, Eun-Seo Park, Sang-Young Park, Kyu-Hong Choi, Jae-Cheol Yoon, Jo Ryeong Yim, Joon-Min Choi, Byung-Kyo Kim
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 23, Iss 4, Pp 355-372 (2006)
Mission opportunities and trajectory characteristics for the future Korean Mars mission have designed and analyzed using KSLV-III(Korea Space Launch Vehicle-III). Korea's first space center, ``NARO space center'' is selected as a launch site. For lau
Externí odkaz:
https://doaj.org/article/4263a52fb7b249488bc05edc8996f22c
Autor:
Young-Joo Song, Eun-Seo Park, Sung-Moon Yoo, Sang-Young Park, Kyu-Hong Choi, Jae-Cheol Yoon, Jo Ryeong Yim, Joon-Min Choi, Byung-Kyo Kim
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 22, Iss 4, Pp 451-462 (2005)
Optimal Trajectory Correction Maneuver (TCM) design algorithm has been developed using the B-plane targeting method for future Korean Mars missions. For every mission phase, trajectory informations can also be obtained using this developed algorithms
Externí odkaz:
https://doaj.org/article/ba22fed61efa4f1aa279386b80c2e3f0
Autor:
Eun-Seo Park, Young-Joo Song, Sung-Moon Yoo, Sang-Young Park, Kyu-Hong Choi, Jae-Cheol Yoon, Jo Ryeong Yim, Joon-Min Choi, Byung-Kyo Kim
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 22, Iss 4, Pp 463-472 (2005)
In this paper, the dynamic model development for interplanetary navigation has been discussed. The Cowell method for special perturbation theories was employed to develop an interplanetary trajectory propagator including the perturbations due to geop
Externí odkaz:
https://doaj.org/article/ac8d73c01fe347fe9e0814eb9e991dc6