1KMA Proprietary Material 4th GOES-R Users’ Conference

Introduction toIntroduction toCommunication, Ocean & Meteorological SatelliteCommunication, Ocean & Meteorological Satellite

2006. 5.Hee-Hoon Lee

Korea Meteorological Administration

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Mission Objectives of COMS

Satellite Communication MissionSatellite Communication Mission

• In-orbit verification of developed communication technologies

• Experiment of wide-band multi-media communication service

Weather Monitoring MissionWeather Monitoring Mission

• Continuous monitoring of imagery and extracting of meteorological products with high-resolution and multi-spectral imager

• Early detection of special weather such as storm, flood, yellow sand

• Monitoring of long-term change of sea surface temperature and cloud

Ocean Monitoring MissionOcean 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

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SOC(KARI)

Internet

End-users

)

MSC(KMA)KOSC(KORDI)

Exclusive line

TM/TC

Rawdata

LRIT/HRIT(backup) TM/TC

(backup)

Rawdata

LRIT/HRIT

LRIT/HRIT

Raw data

CTES(ETRI)

COMS

V-0

01-8

)

Ka-bandCommunication

End-users

COMS System Architecture

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Flight Configuration of COMS Satellite

Earth Direction

Ram Direction

Ka Band Antenna

Meteorological Imager (MI)

Geostationary Ocean Color Imager (GOCI)S-Band Antenna

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Launch Vehicle Compatibility

Ariane 5Sea Launch Delta 4

ProtonAtlas V

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Some System Requirements (1)

Satellite LifetimeSatellite Lifetime

• Operational Life > 7 years from the end of IOT period

• Design Life > 10 years

Spacecraft StabilizationSpacecraft Stabilization

• 3-axis Stabilized Spacecraft for monitoring any regions at any time

ReliabilityReliability

• > 0.75 for Meteorological and Ocean Monitoring Mission at End of Life

• > 0.85 for Communication Payload based on 12 years Design Life

Launch Vehicle CompatibilityLaunch Vehicle Compatibility

• Compatible with Ariane, Delta, Atlas, Proton, Sea-Launch, etc.

• Compatible with the Launch vehicle Mission Profiles and Sequences

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System Requirements (2)

Orbital LocationOrbital Location

• Geosynchronous Orbit at 116.2E or 128.2E

• Location will be finalized after the approval from ITU

Stationkeeping AccuracyStationkeeping Accuracy

• ± 0.05 ° in longitude and latitude of the nominal orbit location

Transfer Orbit OperationTransfer Orbit Operation

• Arrive at the Target Orbit within 30days after Separation from Launch Veh.• 6 month IOT to verify the Performance of the Spacecraft and Payloads

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MI Requirement

Number of Channels 5ch (Vis-1ch, IR-4ch)

Digitization 10bits

Full Disc Scan Time < 27min.

Channel Spectral band(㎛ )

IFOV(km) Application

VIS(Visible) 0.675 1

Daytime cloud imageryDetection of special event (yellow dust, fire, haze, etc.),

Atmospheric motion vector

SWIR 3.75 4 Nighttime fog/stratus, Fire detection, Surface temperature

WV(Water Vapor)

6.75 4 Upper atmospheric water vapor, Upper atmospheric motion

WIN1(Window) 10.8 4 Standard IR split window channel

(Cloud, Sea surface temperature, Yellow sand detection)

WIN2(Window) 12.0 4 Standard IR split window channel

(Cloud, Sea surface temperature, Yellow sand detection)

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GOCI Requirements

Item RequirementsSpatial

Resolution 500m X 500m (+/- 10%)

Coverage 2,500km X 2,500kmNo. of Band 8 Visible bands

Band Center Band Width Nominal Rad

ianceMax Radianc

eNEdLSNR

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

660 20 32.0 58.3 0.032 1,010

680 10 27.1 46.2 0.031 870

745 20 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

∙ 10:00 ~ 17:00 : 8 times,∙ 22:00, 02:00 : 2 times

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GOCI Scene Observation and Coverage

The nominal instrument Field of View (FOV) centered at Korean Seas: 36oN and 130oE

The coverage area depends on the satellite orbit: red line for 116 E and yellow line for 127 E

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COMS Ground Station Locations

KMSC SOC CTES KOSC~110km ~4km ~135km~110m

MSC SOC CTES KOSC~110km ~4km ~135km

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Operation of MI

Mode Global Regional Local

Duty Cycle 30 min. 30 min. 10 min.

Time per Cycle

≤27 min.Per the scan speed of the global observation mode

1 min.

Observation ModeObservation Mode

Local Area Full Disk Regional Area

ENH

APNH

LSH

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Processed Data Distribution Coverage

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Baseline Products

Group Product Spatial

Resolution

Temporal

Resolution

Accuracy

(Thres.)

Cloud Detection CLD 1x1 pixel =obs

CSR ~ 100km =obs

AMV AMV ~ 50km 3 hr. 9 m/s

Surface Information

SST 1x1 pixel hourly 1.2 K

LST 1x1 pixel hourly 2 K

Sea Ice/SC 1x1 pixel daily

Insolation 1x1 pixel hourly 10 %

Water vapor Information

UTH ~ 50km =obs 20 %

TPW ~ 50km =obs 20 %

Cloud Information

CLA 3x3 pixel =obs

CTT/CTH 1x1 pixel or

3x3 pixel

=obs 3 K

1 km

Fog 1x1 pixel =obs

PI 1x1 pixel =obs 20 % bias

OLR ~ 10km hourly 10 %

Aerosol Information

AI 1x1 pixel =obs

AOD 10x10 pixel =obs 35 %

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Sea Ice/Snowdetection

OLR

TPW UTHCloud Amount

Cloud Phase

AMV

SST

Insola-tion

LSTAOD

Aerosol Detection

PI

Cloud Type

COD

CTT&CTH

Fog

Cloudy Clear

COMS Level 1B Image data Auxiliary Data

CloudDetection

CSR

Baseline Products

AMV: Atmospheric motion vectorAOD: Aerosol optical depthCOD: Cloud optical depthCTT: Cloud top temp.CTH: Cloud top height

TPW: Total precipitable waterPI: Precipitation indexUTH: Upper Tropospheric HumidityCSR: Clear Sky Radiances

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COMS Frequency Registration

ITU Registration Orbit : 116.2E / 128.2EITU Registration Orbit : 116.2E / 128.2E

ITU Registration Frequency BandITU Registration Frequency Band

• For Ocean and Meteorological Service and Satellite Operation : 1,670 ~ 1,710 MHz(L-Band): Sensor Data & Processed Data Downlink

: 2,025 ~ 2,110 MHz(S-Band): Processed Data & Command Uplink

: 2,200 ~ 2,290 MHz(S-Band): Telemetry Downlink

• For Communication Service : 27.5 ~ 30.8 GHz: Ka-Band Uplink

: 18.3 ~ 20.7 GHz: Ka-Band Downlink

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Major Milestones for COMS Development

• Prime Contractor EDC(EADS Astrium): 27 April 2005

• Kickoff Meeting at Astrium: 18-19 May 2005

• System Requirement Review: 13-14 June 2005

• System Design Review: 8-9 August 2005

• Preliminary Design Review : 9-13 January 2006

• Future Milestones

– Critical Design Review: March 2007

– Launch: End of 2008