vco_vexag2005
DESCRIPTION
VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005 VCO_VEXAG2005VCO_VEXAG2005 VCO_VEXAGTRANSCRIPT
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JAXAs Venus Climate Orbiter (PLANET-C) overview
Launch: Jun 2010Arrival: Dec 2010Mission life: 2 years
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Venus and Earth
They have almost the same size and mass. Surface environments are completely different.
(Venus environment: CO2 atmosphere, no ocean, 92bar, 740K, H2SO4 cloud ..)
What differentiated these planets? How does the climate system work under different conditions?
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Science goals
Atmospheric dynamics Mechanism of super-rotation Meridional circulation Meso-scale processes Lightning Cloud physics
Detection of active volcanism Inhomogeneity of surface material Zodiacal light
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Planetary wave
Baroclinic instability Tropical cyclones
Cloud crusterInertio gravity wave
Cumulus convectionGravity wave
Boundary layer
Boundary layer turbulence
Climate change
Wave breaking
Hierarchy of Earths meteorology
Interaction
1sec 10min 1hr 6hr 2d 20d 1yr 10yr M
acro
Meso
M
icro
104 km
103 km
102 km
10 km
1 km
100 m
10 m
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Hierarchy of Venus meteorology1sec 10min 1hr 6hr 2d 20d 1yr 10yr
Macro
M
eso
Micro
104 km
103 km
102 km
10 km
1 km
100 m
10 m
?Super-rotation
???????Upscale cascade to super-rotation?
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Forbes (2002)
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Concept of meteorological satellite
Monitoring global structure Wide field of view (12o)
Covering wide-range of time scales Continuous, systematic sampling
(every 2 hours) Local time coverage
Equatorial orbit Meso-scales / Wind vectors
High spatial resolution (~10 km)
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SpacecraftMass 480 kg
(including fuel)Science payload 34 kgAttitude control
Pointing accuracy 0.1o
Stability 0.01o
OribitPeriapsis 300km
Apoapsis 13 RvPeriod 30 hours
12o FOV
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Science instruments (1)1-m camera (IR1) by Tokyo U.
= 1.01 m (near-IR window)Pixels: 1024x1024, Detector: Si-CSD/CCD Cloud (day/night) Active volcanism / surface emissivity (night)
2-m camera (IR2) by Kumamoto U. = 1.73, 2.26, 2.32 m (near-IR window), 2.02 m (CO2 absorption), 1.65 m (zodiacal light) Pixels: 1024x1024, Detector: PtSi
Cloud / Particle size Carbon monooxide (night) Cloud top height (day) Zodiacal light (cruising) Galileo (2.3m)
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Science instruments (2)UV imager (UVI) by Hokkaido U.
= 283, 365 nm Pixels: 1024x1024, Detector: SiCCD SO2 / Unknown UV absorber (day)Longwave IR camera (LIR) by Inst. of Polar Res. = 8-12 m Pixels: 240x320, Detector: uncooled bolometer Cloud top temperature (day/night)Lightning and Airglow camera (LAC) by Tohoku U. = 777, 551, 553, 558, 630 nm Pixels: 8x8, Detector: APD (50kHz sampling) Lightning (night) O2 /O airglow (night)
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Spacecraft motion
To the earth
Atmosphere
X-band beacon
Science instruments (3)Sensor Digital Electronics unit (DE) by JAXA
Controlling observation sequence of camerasOnboard calibrationJPEG2000 data compression
Ultra-stable oscillator (Radio science) by JAXA~10-13, provided by Timetech Co. Temperature profiles H2SO4 vapor profile Ionosphere
Usuda deep space center
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1-m camera
2-m camera
Longwave IR camera
Lightning and airglow camera
Ultraviolet imager
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0 50 100velocity (m s-1)
(km)100
80
60
40
20
0
Cloud layer
Sounding regionR
adio occultation
CO
(Near-IR
)Low
er cloud (Near-IR
)
Airglow
(Visible)
SO
/Unknow
n absorber (UV
)
Cloud top tem
perature (IR)
2
CO
absorption (Near-IR
) 2
Lightning
Surface (N
ear-IR)
Unknown momentum transport
Altitude coverage
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Observation sequence in each revolution300km x 13 RVenusPeriod: 30 hoursInclination: 172 deg Global images of
atmosphere and ground surface (~24 hours)
Close-up images / Lightning / Airglow (~3 hours x 2)
Limb images (~1 hour)
Resolution: 10-20 km
Resolution: 1-10 kmResolution: 0.2-1 km
Temperature/H2SO4vapor by radio occultation
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Orbital motion roughly synchronized with the super-rotational flow near the cloud base
60 m/s westward flow near the cloud base
Spacecraft
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100-300 km
Movement with time
Derivation of cloud motion vectors every 2 hours
Cloud tracked winds on the Earth
Accurate derivation of eddy motions embedded in the background super-rotation
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0 km
50 km
35-50 km
100 km
65 km
NightsideDayside
SO2 / Unknown absorber (UVI
Cloud top temperatureLIR
Lower clouds IR1 Carbon monooxide
IR2
TemperatureH2SO4 vapor RS
Cloud motion vectors
Airglow LAC
Lightning LACActive volcanism / Surface material IR1
Cloud top height IR2
3-D global meteorological data
Lower clouds IR1/IR2
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Search for hot lava by taking global pictures at 1.01m several times per orbit
Emissivity distribution of the ground surface
Cloud feature is distinguished from surface feature by taking motion pictures and using 1.7m and 2.3m images which reflect cloud feature but not the surface feature.
Optical sounding of ground surface
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Schedule2004 Proto Model (Phase-B) start2006 Flight Model design/manufacturing start2009 Final integration test2010 Launch / Arrival at Venus
IR2 test modelM-V rocket of JAXA
JAXAs Venus Climate Orbiter (PLANET-C) overviewVenus and EarthScience goalsHierarchy of Earths meteorologyHierarchy of Venus meteorologyConcept of meteorological satelliteSpacecraftAltitude coverageObservation sequence in each revolution3-D global meteorological dataOptical sounding of ground surfaceSchedule