Communication, Ocean and Meteorological Satellite(COMS) Program in Korea

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)

Meteorological Research Institute May, 2004 2

National Space Program in Korea

1999 KITSAT 3

2003Scientific Satellite 1


2008 Scientific Satellite 3

2006

2011

2005 KOREASAT 5

1999 KOREASAT 3


ScientificSatellite 6

2004 KOMPSAT 2

2008Communication, Ocean & Meteorological Satellite-1

2008 KOMPSAT 3

2009 KOMPSAT4

2010KOMPSAT5

2011 Scientific Satellite4

2012KOMPSAT 6

2014KOMPSAT 7

2015KOMPSAT 8

2015 KOREASAT 6

1999 KOMPSAT 1

2014Communication, Ocean& Meteorological Satellite 2


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.


COMS Development Organization

- System Development- BUS Development- Meteorological & Ocean Sensor Development- Ground Station Development- Satellite Control- Orbit&Frequency Acquisition

Leading Organization

Korean Government

(MOST, MIC, MOMAF, KMA)

KARI

ETRI

- Communication Payload Development- Satellite Control System Development- Ground Station Co-Development

Korea Space Industries

- BUS Part Design/Manufacturing- Payload Part Design/ Manufacturing

METRI/KORDI

- User Requirements of Metorology & Ocean Sensor- Sensing Data Application Development

- Co-Development of System- Co-Development of BUS

Co-Developer

Overseas Manufacturer


COMS - itinerary


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


COMS - figure

Oceanographic payload

Meteorological Payload

Ka-band antennafor

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


COMS System Requirement

Operation Orbit Geosynchronous

Mass 2.5 ~ 3.0 tons(TBD)

Power 3 kW(TBD)

Operation Life More than 7 years

Attitude Control 3-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


User Requirements (1/4)- Communication Mission -

▣ Requirement of Ka-band Payload(TBC) ▣ Ka-band Service Coverage

Frequency(Ka-band)

Uplink : 29.6 ~ 30.0GHzDownlink : 19.6 ~ 20.3GHz

Minimum EIRP edge of

coverage58dBW

G/T 13dB/K

Bandwidth 400MHz(100MHz/channel)

Beamwidth 0.6degree/each beam

Coverage Refer to right figure


User Requirements (2/4)- Oceanic Mission -

▣ Requirement of Ocean Sensor(TBD) ▣ Ocean Sensor Coverage

Item Requirements

Spatial Resolution 500m X 500m

Coverage 2,500km X 2,500km

No. of Band 8 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-

1sr-1]

Max. Rad.[Wm-2

um1sr-1]NEdL SNR

412 20 100 150.0 0.100 1,000

443 20 92.5 145.8 0.085 1,090

490 20 72.2 115.5 0.067 1,170

555 20 55.3 85.2 0.056 1,070

625 20 32.0 58.3 0.032 1,010

670 20 27.1 46.2 0.031 870

765 40 17.7 33.0 0.020 860

865 40 12.0 23.4 0.016 750

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


User Requirements (3/4)- Meteorological Mission (1/2) -

▣ Requirement of Imager(TBC)

Number of Channels 5ch (Vis-1ch, IR-1ch, WV-1ch, IRWin-2ch)

Digitization 10bits

Full Disc Scan Time 25min.

ChannelSpectral

band(㎛ )

IFOV(km) Application

VIS1 0.67 1

Daytime cloud imagery, RGB color composite, Detection of special event (yellow dust, fire, haze, etc.),Atmospheric motion vectorAerosol optical depth, RGB color composite, NDVI

IR 3.8 4 Nighttime fog/stratus, Fire detection, Surface temperature

WV1 6.7 4 Upper atmospheric water vapor, Upper atmospheric motion vector

IR WIN3 11.0 4 Standard IR split window channel(cloud, Sea surface temperature, Yellow dust, ash..)

IR WIN4 12.0 4 Standard IR split window channel(cloud, Sea surface temperature, Yellow dust, ash..)


User Requirements (4/4)- Meteorological Mission (2/2) -

▣ Operation Mode of Imager

▣ Regional Observation Area Watched on the 116E Equator

Observation Mode

Observation Area

Observation Cycle

Operation Type Remark

Global Full Disk 30min. Normal

Regional EAPNH* 15min. Normal

Local Local Area 7-8min. Special As required

* EAPNH : East Asia and Pacific in Northern Hemisphere


COMS System Architecture

Command,Telemetry

Raw Data,HRIT/LRIT

HRIT/LRIT

Satellite Operation Control Center/ Back-up Data Processing Center

Meteo/Ocean DataApplication Center(Primary Data Processing Center)

HRIT/LRITForeignMeteorological DataReceiving Station

CommunicationSystem MonitoringFacility

Specialized Organization/ Domestic User

Foreign Meteorological Organization/ Foreign User

Exclusive Line

Meteorological Information Supply

Various SiteInternet

Internet

Ka-band RF Signals

Raw Data


COMS Frequency and Orbit(Draft)

▣ COMS Orbital Position : 116E (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


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


The Distributions of Daily Rainfall

Mt. Jiri Heavy Rainfall

Seoul/Kuingki Prov

TY Rusa Heavy Rainfall


Hourly Rainfall Intensity(Mt. Jiri’s Heavy rainfall)

0

20

40

60

80

100

120

140

1 2 3 4 5 6 7 8 9 101112131415161718192021222324

[hr]시각

[mm

]강

우량

순천 해남 무안 장흥 남원


Distribution of Hourly Rainfall(Mt. Jiri Heavy Rainfall)

13LST 14LST 15LST 16LST 17LST 18LST



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

0

10

20

30

40

50

60

70

80

90

100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1819 20 21 22 23 24

[hr]시각

[mm

]강

우량

서울 춘천 홍천 양평 인천


Distribution of Hourly Rainfall(Seoul/Kyungki Prov. Heavy Rainfall)




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

0

20

40

60

80

100

120

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

[ hr ]시각

[ m

m ]

강우

량

강릉 대관령 동해 속초 추풍령


Distribution of Hourly Rainfall(TY Rusa Heavy Rainfall)



No observed data

due to record-broken rain


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


COMS – Sincere Prayer

Documents

Communication, Ocean and Meteorological Satellite(COMS) Program in Korea