Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Jeong-sook Lee"'
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 19, Iss 3, Pp 197-206 (2002)
NORAD Two Line Elements (TLE) are widely used for the increasing number of small satellite mission operations and analysis. However, due to the irregular periodicity of generation of the NORAD TLE, a new TLE that is independent of NORAD is required.
Externí odkaz:
https://doaj.org/article/7443b1d87cb14d09bc48a4ba9791811c
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 19, Iss 2, Pp 89-96 (2002)
General along-track acceleration was estimated in the KOMPSAT-1 orbit determination process. Several sets of the atmospheric drag and solar radiation pressure coefficients were also derived with the different spacecraft area. State vectors in the orb
Externí odkaz:
https://doaj.org/article/5a07053825a74906afc739a3d4397a92
Autor:
Bo-Yeon Moon, Jeong-Sook Lee, Byoung-Sun Lee, Jae-Hoon Kim, Eun-Seo Park, Jae-Cheol Yoon, Kyoung-Min Roh, Kyu-Hong Choi
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 19, Iss 2, Pp 163-172 (2002)
This article investigates the problem of data preprocessing for the precision orbit determination (POD) of low earth orbit satellite using GPS raw data. Several data preprocessing algorithms have been developed to edit the GPS data automatically such
Externí odkaz:
https://doaj.org/article/284ac6706b234c6bb10315af8fa1444b
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 17, Iss 2, Pp 285-294 (2000)
The post-launch mission analysis of the KOMPSAT-1 spacecraft was carried out. The injection accuracy of the Taurus launch vehicle was analyzed by comparison of the target and the realized orbit parameters. The tracking station contact analysis was al
Externí odkaz:
https://doaj.org/article/e7890aa0dabc4a63bf4ac2bc3ced51c5
Autor:
Byoung-Sun Lee, Jeong-Sook Lee
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 15, Iss 2, Pp 417-425 (1998)
Monte Carlo analysis is performed for the first acquisition and tracking of the KOMP-SAT spacecrat in GSOC tracking station after separation from Taurus launch vehicle. The error bounds in position and velocity vector in Earth-fixed coordinate system
Externí odkaz:
https://doaj.org/article/e0caa33c21564d279a6d65a33fe41b1e
Autor:
Jeong-Sook Lee, Byoung-Sun Lee
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 15, Iss 2, Pp 437-447 (1998)
Orbit error analysis was performed for the GPS navigation solutions and ground station tracking data of the KOMPSAT (Korea Multi-Purpose SATellite), which will be launched in 1999 for cartography of Korean peninsula as main mission. A least square me
Externí odkaz:
https://doaj.org/article/dab7c03c2fab47fcbc744fb2786d754d
Autor:
Byoung-Sun Lee, Jeong-Sook Lee
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 15, Iss 1, Pp 197-208 (1998)
Ground track maintenance maneuver simulations for the KOMPSAT spacecraft are performed for three and half years. Both longitude targeting and time targeting strategies are applied for in-plane maneuvers. The nominal longitude bands of maneuvers for
Externí odkaz:
https://doaj.org/article/5212cb70fea44a66bbb221abc7ffdc47
Autor:
Jeong-Sook Lee, Byoung-Sun Lee
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 12, Iss 2, Pp 244-255 (1995)
The success of a satellites mission is largely depended upon the choice of an appropriate orbit. In the case of a remote sensing satellite which observes the Earth, there exits an optimum solar elevation angle depending on the mission. Therefore a su
Externí odkaz:
https://doaj.org/article/1c3791572a3c456abcea7b41e1bb913c
Autor:
Jeong-sook Lee, Ah Hyung Park, Sang-Hee Lee, Seoung-Hoon Lee, Jin-Hwan Kim, Suk-Jin Yang, Young Il Yeom, Tae Hwan Kwak, Dongyeop Lee, Seung-Jae Lee, Chul-Ho Lee, Jin Man Kim, Daesoo Kim
Publikováno v:
PLoS ONE, Vol 7, Iss 10, p e47122 (2012)
NADH-quinone oxidoreductase 1 (NQO1) modulates cellular NAD(+)/NADH ratio which has been associated with the aging and anti-aging mechanisms of calorie restriction (CR). Here, we demonstrate that the facilitation of NQO1 activity by feeding β-lapach
Externí odkaz:
https://doaj.org/article/7cefc0f93dbb4d32bed0f9646c1a468c
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 10, Iss 2, Pp 152-162 (1993)
We developed the S/W which calculate the Planetary and the Moon ephemerides. The ephemeris of the Solar system objects was obtained from a simultaneous numerical integration of the equations of motion for the nine planets and the Moon. The mathematic
Externí odkaz:
https://doaj.org/article/3b918059214c4d948deb8ecc7bf452ec