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Korean Plan for
SLR System Development
2006. 10.
Hyung Chul Lim
Korea Astronomy and Space Science Institute
15th International Laser Ranging Workshop
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21. Introduction of KASI
2. Present Status of Korea
3. Plan of SLR System Development
4. Future Plan of Space Geodesy
Outline
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- -3 Global KASI
OrganizationOrganization
President Auditor
Assistantto Auditor
Research ReviewCommittee
Advisory Committee
Vice-President
Optical Astronomy
Division
SpaceScienceDivision
GeneralAdministration
Division
AstronomicalInformation
Center
Int’l Center for
Astrophysics
Radio Astronomy
Division
Space GeodesyDivision
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- -4 Global KASI
KASI Facilities in KoreaKASI Facilities in Korea
KVN Yonsei Radio Astronomy Observatory
GPS StationsGPS Stations
KVN Ulsan Radio
Astronomy Observatory
KVN Tamna Radio Astronomy Observatory
• 14m
• 2.8m
• 1m
• 1m x 2
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- -5 Global KASI
KASI Facilities in KoreaKASI Facilities in Korea
GPSGPS StationsStationsMokpoMokpo
YeosuYeosuMilyangMilyang
Mt. BohyunMt. Bohyun
SokchoSokcho
Mt. SobaekMt. Sobaek
JejuJeju
DaejeonDaejeon
Seoul Seoul 4th IGDC
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- -6 Global KASI
KASI Facilities in OverseasKASI Facilities in Overseas
• Robotic telescope in Mt. Lemmon,
Arizona
• 1m reflecting telescope
• Fully automated robotic telescope
• Robostic Telescope with Wide Field
• All Systems are controlled by remote site
• Survey of NEO and Variable Stars,
Satellite Optical Tracking
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7(STSAT-2) (KOMPSAT-5)Laser Retro-Reflector
Array
� No SLR Station in Korea
� Two Satellites with the LRA(Laser Retro-reflector Array)
� STSAT-2(2007) and KOMPSAT-5(2009)
� Tracking System which can determine the Precise Orbit
Present Status of Satellites with LRA
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8� No Fundamental Station in Korea
� ITRF and ICRF Coordinate, EOP, Polar Motion, LOD, etc.
� GPS Station (about 80) and VLBI Station (3) in Korea� Crustal movement, Geodetic survey, mapping
� KASI wants to construct the Fundamental Station
GPS SLRVLBI
++++ ++++
Present Status of Space Geodesy
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9Korean GPS Network
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10Jeju
Ulsan
Seoul
Korean VLBI Network
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11SaTRec• Satellite Technology Research Center
• Tx/Rx Electical System
KAERI• Korea Atomic Energy Research Institute
• Laser Generator
KIMM• Korea Institute of Machinary & Materials
• Tracking Mount
• Tx/Rx Telescope
• System Control & Operating S/W
• Precise Orbit Determination SystemKASI
Feasibility study for the
SLR system development
Establishment of the
development strategy
� Period : 2004. 12 – 2005. 11 (1 year)
� Funded by Ministry of Science & Technology
Overview of Preliminary Research
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12� Final Goal : One Mobile(40cm) & One Fixed SLR system(1m)
� Development Period : 5 years
� Mobile system : 2 yrs
� Fixed system : 5 yrs
� Subsystem Development (3.5 yr) + SI (0.5yr) + Test Operation (1 yr)
� Funded by government side
� Participants
� KASI and other government institutes : system development
� Universities : research on the application of SLR system
� Foreign Cooperation
� Subsystem development, System integration, Test operation
� Applications
� Satellite Tracking(precise orbit determination), Space geodesy
Strategies for SLR System Development
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13201220112010200920082007
Introduction of a mobile SLR system from China
Sub-systems
design
Test bed development for mobile system(40cm)
Sub-systems development
System
integration
System field test
STSAT-2
Launch
KOMPSAT-5
Launch
Join to
ILRS
Station construction Radar and MET
establishment
Time Schedule for SLR System Development
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14� Tracking Coverage• Possible to track satellites in the altitude of 25,000km
• STSAT-2, KOMPSAT-5, GPS, Galileo Satellites and so on
� Ranging Accuracy
• Lageos : 10mm(SS), 1-2mm(NP)
• GPS and Galileo : 20mm(SS), 3-5mm(NP)
• Ground Target : 3mm(SS), 1mm(NP)
� Automatic Operation
• All system can be controlled from the remote site
• Aircraft detection using radar and automatic observation according to the schedule
� Etc
• Daylight tracking
• Optical tracking of the space launch vehicle (if possible)
System Requirements
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15Joining IVS (2010)
KVN Geodetic VLBI (2001-2007)
IGS Analysis Center(2008)
IGS Global Data Center(2005)
Joining ILRS(2012)
SLR Construction(2008-2012)
Project Plan(2005-2006)
Future Plan of Space Geodesy
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16Thank You!Thank You!