Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Seong-Pal Lee"'
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 20, Iss 4, Pp 313-318 (2003)
A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in this paper. LEO satellite constellation has been another choice of communications system. The
Externí odkaz:
https://doaj.org/article/9f81c73ea61140799c28a3f4c7971bf7
Autor:
Tae-Hyuk Lee, Bo-Hee Yoon, Jae-Hoon Kim, Seong Pal Lee, Kyoung-Tae Park, Hong-Kyu Kim, Jong-Hyeon Lee
Publikováno v:
Journal of the Korea Foundry Society. 32:32-37
In this study, microstructural evaluation was carried out on secondary hardening type ultrahigh strength steel, Fe-Co-Ni composition. This paper as a first part of whole research presented the microstructural behavior by cyclic heat treatment. The cy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fc7be368e777c67b1752c46df78e000
https://doi.org/10.7777/jkfs.2012.32.1.032
https://doi.org/10.7777/jkfs.2012.32.1.032
Publikováno v:
Journal of the Korean Society for Aeronautical & Space Sciences. 32:88-94
The electrical design of the Ka-band antenna for the domestic Communications and Broadcasting Satellite (CBS) is described. The antenna has the offset Gregorian structure and is installed on the Earth-facing panel of the satellite. The electrical per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44df1a5b6b3ff7003383e53ae0bbeca0
https://doi.org/10.5139/jksas.2004.32.4.088
https://doi.org/10.5139/jksas.2004.32.4.088
Autor:
Jae-Cheol Yoon, Byoung-Sun Lee, Kyu-Hong Choi, Jeong-Sook Lee, Seong-Pal Lee, Kyoung-Min Roh, Eun-Seo Park, Jae-Hoon Kim
Publikováno v:
Acta Astronautica. 54:571-576
GPS navigation solutions and GPS-related telemetry points are analyzed using one-day playback data from the KOMPSAT-1 Spacecraft. Then, the GPS navigation solutions are reconstructed using simulated GPS raw measurements such as pseudo-ranges between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2309d6adadd71a7db37f1f340de1d65
https://doi.org/10.1016/s0094-5765(03)00230-3
https://doi.org/10.1016/s0094-5765(03)00230-3
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 20, Iss 4, Pp 313-318 (2003)
A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in this paper. LEO satellite constellation has been another choice of communications system. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5dee2e80dd6a77aa15abff757dd2fa5
http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n4/OJOOBS_2003_v20n4_313.pdf
http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n4/OJOOBS_2003_v20n4_313.pdf
Publikováno v:
International Journal of Aeronautical and Space Sciences. 4:88-94
This paper describes the design of the Ka-band Antenna/RF system, which was developed for the experiment of the high-speed satellite communications with geostationary satellite. The design issues described here are the ka-band characteristics for hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fdfc4063d1254ab8823c01cdb3f5d61
https://doi.org/10.5139/ijass.2003.4.2.088
https://doi.org/10.5139/ijass.2003.4.2.088
A Dual-Mode Narrow-Band Channel Filter and Group-Delay Equalizer for a Ka-Band Satellite Transponder
Publikováno v:
ETRI Journal. 25:379-386
This paper presents the design of a narrow-band channel filter and its group-delay equalizer for a Ka-band satellite transponder. We used an 8th order channel filter for high selectivity with an elliptic-integral function response and an inline confi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce08156d54e3405cb994f4008509538f
https://doi.org/10.4218/etrij.03.0102.0007
https://doi.org/10.4218/etrij.03.0102.0007
Autor:
Jeong-Sook Lee, Jae-Hoon Kim, Eun-Kyou Kim, Byoung-Sun Lee, Seong-Pal Lee, Hae-Jin Choi, Hae-Dong Kim
Publikováno v:
ETRI Journal. 25:387-400
Since its launching on 21 December 1999, the Korea Multi-Purpose Satellite-I (KOMPSAT-I) has been successfully operated by the Mission Control Element (MCE), which was developed by the ETRI. Most of the major functions of the MCE have been successful
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ea03ef9f8e7864fbad33e6c8bdf7157
https://doi.org/10.4218/etrij.03.0102.0518
https://doi.org/10.4218/etrij.03.0102.0518
Publikováno v:
Microwave and Optical Technology Letters. 38:64-68
This paper deals with a simple method to extract the coupling matrix of a 10th-order dual-mode asymmetric canonical filter. The coupling matrix of an asymmetric canonical filter is obtained by applying a plane rotation technique to the coupling matri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d9921aea76309daab54756ce4becc49
https://doi.org/10.1002/mop.10972
https://doi.org/10.1002/mop.10972
Publikováno v:
International Journal of Aeronautical and Space Sciences. 3:40-45
A radiation analysis is performed for the Ka and Ku-band transponder of the Communications and Broadcasting Satellite (CBS) that is planned for launch into the geo-synchronous orbit. A particular attention is given to calculation of Total Ionizing Do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c819aebf2b23b96147b0865f14aed96
https://doi.org/10.5139/ijass.2002.3.2.040
https://doi.org/10.5139/ijass.2002.3.2.040