modis and viirs vegetation indices and validation · 2015. 12. 17. · modis and viirs vegetation...
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MODIS and VIIRS Vegetation Indices and Validation
Tomoaki Miura Dept. Natural Resources & Environmental Management University of Hawaii at Manoa
7-9 November 2011
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NASA LCLUC Meeting, Hanoi, Vietnam
Contributions from: Alfredo Huete, University of Arizona / University of Technology, Sydney NPP User’s Workshop, IGRASS 2011, Vancouver, Canada Fourth Global Vegetation Workshop, Montana, USA
NPP: Oct 28, 2011 at 5:48am EDT •! The National Polar-orbiting
Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP)
•! Five instruments onboard: !! VIIRS !! CERES !! CrIS !! ATMS !! OMPS
•! Replacing the NOAA-19 satellite in the afternoon orbit for improved operational forecasting & monitoring
•! Extending the global environmental observations collected by the Terra, Aqua, and other satellites over the last dozen years
7-9 November 2011
NASA LCLUC Meeting, Hanoi, Vietnam
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Liftoff of the NPP aboard a Delta II rocket at Space Launch Complex-2 at Vandenberg Air Force Base in Calif. Photo credit: NASA/Bill Ingalls (Source: http://jointmission.gsfc.nasa.gov/)
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NASA LCLUC Meeting, Hanoi, Vietnam
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(Source: Goldberg et al., 2011, NPP User’s Workshop, IGRASS 2011)
Visible Infrared Imaging Radiometer Suite (VIIRS) VIIRS (NPP) MODIS (Aqua)
•! Altitude: 824 km, 14 orbits/day •! Overpass time: 1:30pm •! Swath width: ±56°, 3,000 km •! Global coverage: daily •! Spectral: 22 bands •! Spatial: 371 m, 742 m
•! Altitude: 705 km, 16 orbits/day •! Overpass time: 1:30pm •! Swath width: ±55°, 2,330 km •! Global coverage: 1-2 days •! Spectral: 36 bands •! Spatial: 250 m, 500 m, 1,000 m
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NASA LCLUC Meeting, Hanoi, Vietnam
Band # !! !! Band ID 1 620 - 670 600 - 680 I-1 2 841 - 876 845 - 885 I-2 3 459 - 479 4 545 - 565 5 1230 - 1250 1230 - 1250 M-8
1580 - 1670 M-10 1580 - 1610 I-3
7 2105 - 2155 2225 D 2275 M-11 8 405 - 420 402-422 M-1 9 438 - 448 436-454 M-2
10 483 - 493 478-498 M-3 11 526 - 536 12 546 - 556 545-565 M-4 13 662 - 672 662-682 M-5 14 673 - 683 15 743 - 753 739-754 M-6 16 862 - 877 846-885 M-7 17 890 - 920 18 931 - 941 19 915 - 965
6 1628 - 1652
MODIS VIIRS
5
Comparison of MODIS & VIIRS Bands
Band # !! !! Band ID 3.610 D 3.790 M-12 3.550 D 3.930 I-4 21 3.929 - 3.989 22 3.940 D 4.001 23 4.020 - 4.080 3.973 D 4.128 M-13
24 4.433 D 4.498 25 4.482 D 4.549
26 1.360 - 1.390 M-9 27 6.535 - 6.895 28 7.175 - 7.475 29 8.400 - 8.700 8.400 D 8.700 M-14 30 9.580 - 9.880 10.263 D 11.263 M-15 10.050 - 12.400 I-5 32 11.770 - 12.270 11.538 D 12.488 M-16 33 13.185 - 13.485 34 13.485 - 13.785 35 13.785 - 14.085 36 14.085 - 14.385
MODIS VIIRS
10.780 - 11.28031
20 3.660 - 3.840
VIIRS Bands I1-I5 are 371 m at Nadir VIIRS Bands M1-M16 are 742 m at Nadir
MODIS Bands 1-2 are 250 m at Nadir MODIS Bands 3-7 are 500 m at Nadir MODIS Bands 8-36 are 1,000 m at Nadir
1.371--1.386
(Source: Murphy & Reed, 2009, 4th Global Vegetation Workshop)
VIIRS Environmental Data Records (EDR) •! Imagery and Clouds !! Imagery !! Cloud Mask [IP] !! Cloud base height !! Cloud cover/layers !! Cloud effective particle size !! Cloud optical thickness !! Cloud top height !! Cloud top pressure !! Cloud top temperature !! Net heat flux
•! Land !! Active fires [ARP] !! Land surface albedo !! Land surface temperature !! Vegetation index !! Surface type
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•! Aerosols !! Aerosol optical thickness !! Aerosol particle size !! Suspended matter
•! Cryosphere !! Snow cover/depth !! Sea ice characterization !! Ice surface temperature
•! Ocean !! Sea surface temperature !! Ocean color/chlorophyll
(Adapted from: Cao et al., 2011, NPP User’s Workshop, IGRASS 2011)
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Spectral Bandpass Differences 7-9 November 2011
NASA LCLUC Meeting, Hanoi, Vietnam
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Prototype Analysis at 10 Sites Using MODIS
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Harvard Forest
0.2
0.3
0.4
0.5
0.6
0.7
0.8
20
00
-04
9
20
00
-12
9
20
00
-20
9
20
00
-28
9
20
01
-00
1
20
01
-08
1
20
01
-16
1
20
01
-24
1
20
01
-32
1
20
02
-03
3
20
02
-11
3
20
02
-19
3
20
02
-27
3
20
02
-35
3
20
03
-06
5
20
03
-14
5
20
03
-22
5
20
03
-30
5
20
04
-01
7
20
04
-09
7
20
04
-17
7
20
04
-25
7
20
04
-33
7
EV
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-200
0
200
400
600
800
1000
1200
1400
GP
P (
mm
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EVI GPP
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Summary
•!NPP/VIIRS launched on Oct. 28, 2011 !! Replacing NOAA-19 in the afternoon orbit !! Continuing the global environmental observations
begun with the EOS Terra, Aqua, and Aura. •!VIIRS to provide 21 EDRs, 1 IP, and 1 ARP !! VIIRS Vegetation Index EDR: NDVI and EVI •!Validation to begin in a few months !! Beta –> Provisional –> Validated Stages 1-3
7-9 November 2011
NASA LCLUC Meeting, Hanoi, Vietnam
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More Information •! NASA NPP website:
http://jointmission.gsfc.nasa.gov/
•! NOAA/NESDIS/STAR JPSS website: http://www.star.nesdis.noaa.gov/jpss/index.php
•! NOAA/NESDIS JPSS website: http://www.nesdis.noaa.gov/jpss/
•! Data providers: !! NOAA CLASS: http://www.class.noaa.gov !! NASA PEATE
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NASA LCLUC Meeting, Hanoi, Vietnam
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Pixel Aggregation Scheme
(Source: Murphy & Reed, 2009, 4th Global Vegetation Workshop)
0
200
400
600
800
1000
1200
1400
1600
0 10 20 30 40 50 60
Scan angle (degrees)
Hor
izon
tal S
ampl
e In
terv
al (m
)
Aggregate 3in scan
Aggregate 2in scan
No aggregation
HSI for single-gain moderate resolution bands(imaging bands are 1/2x)
Scan HSI
Track HSI(no aggregation)
1700 km (850 km
off nadir)
(Imaging bands 1/2 Moderate HSI)
3000 km (1500 km off nadir)
43.6 degrees
Aggregate 3 in scan
Dual-gain moderate resolution bands to be aggregated on ground
34% more swath for 1.3 km HSI
1129 km off-nadir
1060 km (530 km
off nadir)
Better than 1.3 km Horizontal Sample Interval (HSI) Well Past 1700km
(Source: Murphy & Reed, 2009, 4th Global Vegetation Workshop)
7-9 November 2011
NASA LCLUC Meeting, Hanoi, Vietnam
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(Source: Cao et al., 2011, NPP User’s Workshop, IGRASS 2011)
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