Introduction to Communication, Ocean & Meteorological Satellite
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Transcript of Introduction to Communication, Ocean & Meteorological Satellite
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