Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Sungki Cho"'
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 38, Iss 2, Pp 105-117 (2021)
In this study, a preliminary trajectory design is conducted for a conceptual spacecraft mission to a near-Earth asteroid (NEA) (99942) Apophis, which is expected to pass by Earth merely 32,000 km from the Earth’s surface in 2029. This close approa
Externí odkaz:
https://doaj.org/article/c98e088efd7b402bbc4a755a582ddb66
Autor:
Jin Choi, Jung Hyun Jo, Eun-Jung Choi, Jiwoong Yu, Byung-Kyu Choi,, Myung-Jin Kim, Hong-Suh Yim,, Dong-Goo Roh, Sooyoung Kim, Jang-Hyun Park, Sungki Cho
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 37, Iss 2, Pp 105-115 (2020)
The Korean Institute of Technology Satellite (KITSAT-1) is the first satellite developed by the Satellite Technology Research Center and the University of Surrey. KITSAT-1 is orbiting the Earth’s orbit as space debris with a 1,320 km altitude afte
Externí odkaz:
https://doaj.org/article/f0f3fcb5b903497da64e02dc2533dde7
Autor:
Eun-Jung Choi, Jonghyun Lee, Sungki Cho, Hyun-Wook Moon, Jea-Myong Yum, Jang-Hyun Park, Jung Hyun Jo
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 35, Iss 4, Pp 279-286 (2018)
Radar sensors are used for space situational awareness (SSA) to determine collision risk and detect re-entry of space objects. The capability of SSA radar system includes radar sensitivity such as the detectable radar cross-section as a function of
Externí odkaz:
https://doaj.org/article/e018a9cf75314523a3898d0fabe42d8a
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 4, Pp 289-302 (2017)
The key risk analysis technologies for the re-entry of space objects into Earth`s atmosphere are divided into four categories: cataloguing and databases of the re-entry of space objects, lifetime and re-entry trajectory predictions, break-up models a
Externí odkaz:
https://doaj.org/article/42eab81f0d2b41edb86aab630d017a90
Autor:
Eun-Jung Choi, Sungki Cho, Jung Hyun Jo, Jang-Hyun Park, Taejin Chung, Jaewoo Park, Hocheol Jeon, Ami Yun, Yonghui Lee
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 34, Iss 4, Pp 303-313 (2017)
With increased human activity in space, the risk of re-entry and collision between space objects is constantly increasing. Hence, the need for space situational awareness (SSA) programs has been acknowledged by many experienced space agencies. Optica
Externí odkaz:
https://doaj.org/article/f55e6de92a244fdc89df1cbd6d6621ff
Autor:
Sun-Youp Park, Jin Choi, Dong-Goo Roh, Maru Park, Jung Hyun Jo, Hong-Suh Yim, Young-Sik Park, Young-Ho Bae, Jang-Hyun Park, Hong-Kyu Moon, Young-Jun Choi, Sungki Cho, Eun-Jung Choi
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 33, Iss 3, Pp 221-227 (2016)
As described in the previous paper (Park et al. 2013), the detector subsystem of optical wide-field patrol (OWL) provides many observational data points of a single artificial satellite or space debris in the form of small streaks, using a chopper
Externí odkaz:
https://doaj.org/article/23c3f2dfb9d34ab6a759ba2466d178a4
Autor:
Jin Choi, Jung Hyun Jo, Myung-Jin Kim, Dong-Goo Roh, Sun-Youp Park, Hee-Jae Lee, Maru Park, Young-Jun Choi, Hong-Suh Yim, Young-Ho Bae, Young-Sik Park, Sungki Cho, Hong-Kyu Moon, Eun-Jung Choi, Hyun-Jung Jang, Jang-Hyun Park
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 33, Iss 2, Pp 137-145 (2016)
Inactive space objects are usually rotating and tumbling as a result of internal or external forces. KOREASAT 1 has been inactive since 2005, and its drift trajectory has been monitored with the optical wide-field patrol network (OWL-Net). However,
Externí odkaz:
https://doaj.org/article/bccaaa2da6894a46a0dabb2519336339
Autor:
Jin Choi, Jung Hyun Jo, Hong-Suh Yim, Young-Jun Choi, Maru Park, Sun-Youp Park, Young-Ho Bae, Dong-Goo Roh, Sungki Cho, Young-Sik Park, Hyun-Jung Jang, Ji-Hye Kim, Jang-Hyun Park
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 32, Iss 4, Pp 411-417 (2015)
Several optical monitoring strategies by a ground-based telescope to protect a Geostationary Earth Orbit (GEO) satellite from collisions with close approaching objects were investigated. Geostationary Transfer Orbit (GTO) objects, Inclined GeoSynch
Externí odkaz:
https://doaj.org/article/b6a6ee848e95493eb041fb984ce6760a
Autor:
Maru Park, Jung Hyun Jo, Sungki Cho, Jin Choi, Chun-Hwey Kim, Jang-Hyun Park, Hong-Suh Yim, Young-Jun Choi, Hong-Kyu Moon, Young-Ho Bae, Sun-Youp Park, Ji-Hye Kim, Dong-Goo Roh, Hyun-Jung Jang, Young-Sik Park, Min-Ji Jeong
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 32, Iss 4, Pp 357-366 (2015)
By using the Optical Wide-field Patrol (OWL) network developed by the Korea Astronomy and Space Science Institute (KASI) we generated the right ascension and declination angle data from optical observation of Low Earth Orbit (LEO) satellites. We pe
Externí odkaz:
https://doaj.org/article/459206e9f108488db20503073b95d0f1
Autor:
Dong-Goo Roh, Jin Choi, Jung Hyun Jo, Hong-Suh Yim, Sun-Youp Park, Maru Park, Young-Jun Choi, Young-Ho Bae, Young-Sik Park, Hyun-Jung Jang, Sungki Cho, Ji-Hye Kim, Jang-Hyun Park
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 32, Iss 4, Pp 349-355 (2015)
As a governmentally approved domestic entity for Space Situational Awareness, Korea Astronomy and Space Science Institute (KASI) is developing and operating an optical telescopes system, Optical Wide-field PatroL (OWL) Network. During the test phas
Externí odkaz:
https://doaj.org/article/c29b52a8486b4c45a9d6359fd84c4b65