1. Meteorological Research Institute May. 2004 1 Communication, Ocean and Meteorological Satellite(COMS) Program in Korea COMS Program Office(METRI), Korea Meteorological Administration & Korea Aerospace Research Institute GOES-R User Conf. (10-14 May, 2004)

2. Meteorological Research Institute May, 2004 2 National Space Program in Korea 1999 KITSAT 3 2003 Scientific Satellite 1 2001 2005 Scientific Satellite 2 2008 Scientific Satellite 3 2006 2011 2005 KOREASAT 5 1999 KOREASAT 3 2013 Scientific Satellite 5 2015 Scientific Satellite 6 2004 KOMPSAT 2 2008 Communication, Ocean & Meteorological Satellite-1 2008 KOMPSAT 3 2009 KOMPSAT4 2010 KOMPSAT5 2011 Scientific Satellite4 2012 KOMPSAT 6 2014 KOMPSAT 7 2015 KOMPSAT 8 2015 KOREASAT 6 1999 KOMPSAT 1 2014 Communication, Ocean & Meteorological Satellite 2

3. Meteorological Research Institute May, 2004 3 Mission Objectives of COMS ▣ Satellite Communication Mission ◈ In-orbit verification of the performance of advanced communication technologies. ◈ Experiment of wide-band multi-media communication service. ▣ Ocean Monitoring Mission ◈ Monitoring of marine environments around the Korean peninsula. ◈ Production of fishery information(Chlorophyll, etc.). ◈ Monitoring of long-term/short-term change of marine ecosystem ▣ Weather Monitoring Mission ◈ Continuous monitoring of imagery and extracting of meteorological products with high-resolution and multi-spectral imager. ◈ Early detection of special weathers such as storm, flood, yellow sand, etc. ◈ Extraction of data on long-term change of sea surface temperature and cloud.

4. Meteorological Research Institute May, 2004 4 COMS Development Organization

5. Meteorological Research Institute May, 2004 5 COMS - itinerary

6. Meteorological Research Institute May, 2004 6 COMS Satellite Description ▣ Total Fund of COMS-1 : appr. 240 Million dollars ▣ Mounting Payload Specfication Communication System ( Wt : 90 kg Needed Power : 1,500 W) Marine Obs. Sensor ( Wt : 60 kg N/P : 80 W) Meteorological Obs. Sensor (Wt : 150 kg N/P : 270 W) ▣ The Oncoming Schedule 2004 : Completion of System Design 2005 : Completion of preliminary Design 2006 : Completion of detailed Design 2007 : System Assembly and Test 2008 : Launch and Operation of Satellite

7. Meteorological Research Institute May, 2004 7 COMS - figure Oceanographic payload Meteorological Payload Ka-band antenna for telecommunication Solar panel Inertial balance Antenna for Met/ocean data  platform type  expected at (0 N, 116 E)  Meteorological Imager (5 channels) - Vis 0.55~0.80 micrometer - IR 3.5~4.0, 6.5~7.0, 10.3~11.3, 11.5~12.5 micrometer  Observation mode - Full Disk (planetary) : once / 3 hours - Regional (synoptic) : 4 times/1 hour - Local (mesoscale) : 8 times / 1 hour

8. Meteorological Research Institute May, 2004 8 COMS System Requirement Operation OrbitGeosynchronous Mass2.5 ~ 3.0 tons(TBD) Power3 kW(TBD) Operation Life More than 7 years Attitude Control3-axis stabilized Sensing Data Transmission and Satellite Control Freq. Uplink : S-band Downlink : L-band Communication Service Freq. Ka-band Payload Meteorological Imager + Sounder(?) Ocean Sensor Ka-band Transponder

9. Meteorological Research Institute May, 2004 9 User Requirements (1/4) - Communication Mission - ▣ Requirement of Ka-band Payload(TBC) ▣ Ka-band Service Coverage Frequency (Ka-band) Uplink : 29.6 ~ 30.0GHz Downlink : 19.6 ~ 20.3GHz Minimum EIRP edge of coverage 58dBW G/T13dB/K Bandwidth400MHz(100MHz/channel) Beamwidth0.6degree/each beam CoverageRefer to right figure

10. Meteorological Research Institute May, 2004 10 User Requirements (2/4) - Oceanic Mission - ▣ Requirement of Ocean Sensor(TBD) ▣ Ocean Sensor Coverage ItemRequirements Spatial Resolution 500m X 500m Coverage2,500km X 2,500km No. of Band8 fixed bands Band Center & Band Width & Nominal Rad.& Max Rad. & NEdL & SNR (Sensitivity of sensor) Band Center [nm] Band Width [nm] Nom. Rad [Wm -2 um -1 sr -1 ] Max. Rad. [Wm -2 um 1 sr -1 ] NEdLSNR 41220100150.00.1001,000 4432092.5145.80.0851,090 4902072.2115.50.0671,170 5552055.385.20.0561,070 6252032.058.30.0321,010 6702027.146.20.031870 7654017.733.00.020860 8654012.023.40.016750 MTF  0.3 at Nyquist frequency Dynamic Range  11bit Sensor Calibration - Calibration type : Solar Calibration - Accuracy of Radiometric Calibration :  3% Number of observation - Total : 8 times ∙ 10:00 ~ 17:00 : 6 times, ∙ 22:00, 02:00 : 2 times

11. Meteorological Research Institute May, 2004 11 User Requirements (3/4) - Meteorological Mission (1/2) - ▣ Requirement of Imager(TBC) Number of Channels5ch (Vis-1ch, IR-1ch, WV-1ch, IRWin-2ch) Digitization10bits Full Disc Scan Time25min. Channel Spectral band( ㎛ ) IFOV (km) Application VIS10.671 Daytime cloud imagery, RGB color composite, Detection of special event (yellow dust, fire, haze, etc.), Atmospheric motion vector Aerosol optical depth, RGB color composite, NDVI IR3.84Nighttime fog/stratus, Fire detection, Surface temperature WV16.74Upper atmospheric water vapor, Upper atmospheric motion vector IR WIN311.04 Standard IR split window channel (cloud, Sea surface temperature, Yellow dust, ash..) IR WIN412.04 Standard IR split window channel (cloud, Sea surface temperature, Yellow dust, ash..)

12. Meteorological Research Institute May, 2004 12 User Requirements (4/4) - Meteorological Mission (2/2) - ▣ Operation Mode of Imager ▣ Regional Observation Area Watched on the 116  E Equator Observation Mode Observation Area Observation Cycle Operation Type Remark GlobalFull Disk30min.Normal RegionalEAPNH*15min.Normal LocalLocal Area7-8min.Special As required * EAPNH : East Asia and Pacific in Northern Hemisphere

13. Meteorological Research Institute May, 2004 13 COMS System Architecture Command, Telemetry Raw Data, HRIT/LRIT Satellite Operation Control Center / Back-up Data Processing Center Meteo/Ocean Data Application Center (Primary Data Processing Center) HRIT/LRIT Foreign Meteorological Data Receiving Station Communication System Monitoring Facility Specialized Organization / Domestic User Foreign Meteorological Organization / Foreign User Exclusive Line Meteorological Information Supply Various Site Internet Ka-band RF Signals Raw Data

14. Meteorological Research Institute May, 2004 14 COMS Frequency and Orbit(Draft) ▣ COMS Orbital Position : 116  E (Target Orbit) ▣ COMS Frequency Band ◈ For Ocean and Meteorological Service (will be filed to ITU)  1,670 ~ 1,710 MHz  2,025 ~ 2,110 MHz  2,200 ~ 2,290 MHz ◈ For Communication Service (already secured)  27.0 ~ 31.0 GHz  18.1 ~ 21.2 GHz

15. Meteorological Research Institute May, 2004 15 Case Analyses - July 31,1998 Shoonchun 187mm/day Mt. Jiri ’ s Heavy rainfall - July 15, 2001 Seoul 273.4mm/day Seoul/Kyungki Prov. Heavy Rainfall - Aug. 31, 2002 Kangnung 870.5mm/day TY Rusa ’ s Heavy Rainfall

16. Meteorological Research Institute May, 2004 16 The Distributions of Daily Rainfall Mt. Jiri Heavy Rainfall Seoul/Kuingki Prov TY Rusa Heavy Rainfall

17. Meteorological Research Institute May, 2004 17 Hourly Rainfall Intensity(Mt. Jiri ’ s Heavy rainfall)

18. Meteorological Research Institute May, 2004 18 Distribution of Hourly Rainfall(Mt. Jiri Heavy Rainfall) 13LST 14LST 15LST 16LST 17LST 18LST 19LST 20LST 21LST 22LST 23LST 24LST

19. Meteorological Research Institute May, 2004 19 Hourly Rainfall Intensity(Seoul/Kyungki Prov) * 일강수 5 순위 : 서울, 춘양 (*), 춘천, 홍천, 양평, 인천

20. Meteorological Research Institute May, 2004 20 Distribution of Hourly Rainfall(Seoul/Kyungki Prov. Heavy Rainfall) 01LST 02LST 03LST 04LST 05LST 06LST 07LST 08LST 09LST 10LST 11LST 12LST

21. Meteorological Research Institute May, 2004 21 Hourly Rainfall Intensity(TY Rusa Heavy Rainfall) * 일강수 5 순위 : 강릉, 대관령, 동해, 속초, 추풍령

22. Meteorological Research Institute May, 2004 22 Distribution of Hourly Rainfall(TY Rusa Heavy Rainfall) 02LST 04LST 06LST 08LST 10LST 12LST 14LST 16LST 18LST 20LST 22LST 24LST No observed data due to record-broken rain

23. Meteorological Research Institute May, 2004 23 Summary ▣ Meteorological Effects: - Early detecting and continuous monitoring the high impact weathers - Improvement of NWP model using satellite data - Early detection of aerosol, such as Asian dust, and monitoring of its transport, etc. - Long term extraction of climate variation information  Oceanographical Effects: - Reducing the property damages of fishermen - preventing the ocean resources from damaging ▣ Communicational Effect: - In-orbit test of developed communication payload

24. Meteorological Research Institute May, 2004 24 COMS – Sincere Prayer