Meteorological Research Institute May 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)

Meteorological Research Institute May, National Space Program in Korea 1999 KITSAT Scientific Satellite Scientific Satellite Scientific Satellite KOREASAT KOREASAT Scientific Satellite Scientific Satellite KOMPSAT Communication, Ocean & Meteorological Satellite KOMPSAT KOMPSAT KOMPSAT Scientific Satellite KOMPSAT KOMPSAT KOMPSAT KOREASAT KOMPSAT Communication, Ocean & Meteorological Satellite 2

Meteorological Research Institute May, 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.

Meteorological Research Institute May, COMS Development Organization

Meteorological Research Institute May, COMS - itinerary

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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 , , , , , 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

Meteorological Research Institute May, 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 VIS 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 WIN Standard IR split window channel (cloud, Sea surface temperature, Yellow dust, ash..) IR WIN Standard IR split window channel (cloud, Sea surface temperature, Yellow dust, ash..)

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

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

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

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

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

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

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

Meteorological Research Institute May, 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

Meteorological Research Institute May, 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

Meteorological Research Institute May, COMS – Sincere Prayer