gls analysis - lcluc...
TRANSCRIPT
![Page 1: GLS Analysis - LCLUC Programlcluc.umd.edu/sites/default/files/lcluc_documents/skole_lcluc_4-2010_presentation_day2...Ortho ETM Peak Acqusition month by region Peak greenness is not](https://reader030.vdocuments.us/reader030/viewer/2022040721/5e2ceb938900ed46061663f9/html5/thumbnails/1.jpg)
GLS Analysis
Dave Skole, Walter Chomentowski, and Jay Samek
Michigan State UniversityApril 2010
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GLS data acquisition overview
2005 2000 1990
TOTAL SCENES 9390 8928 7446
TOTAL TROPICS 2323 1920 1866
MISSING SCENES IN
TROPICS 10 0 49
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GLS Acquisition Stability for corresponding path row combinations
Difference acquisition month
GLS data set 0 1 2 3 4 5 6
2005 and 2000 416 587 324 220 166 190 155
2005 and 1990 426 570 381 325 198 207 210
2000 and 1990 347 488 339 255 181 168 140
Number of scenes acquiredRow 1, 2005 and 2000 shows in column 1 the number of GLS2005 scenes acquired in the same month (0 months difference) as GLS 2000Row 2 2005 and 1990 shows in column 1 the number of GLS2005 scenes acquired in the same month (0 months difference) as GLS 1990
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GLS 1990 Data Gap
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Improved GLS 2000 coverage
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GLS2005 holdings by acquisition satellite
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Our Study Area defined with WRS2
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GLS Detailed Analysis 2000
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Data sets Defined
The data sets described in this report are:
• Landsat 7 data set
• GLS 2000 data set
• TRFIC ETM data set
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Census of 3 Archives
Archive Granule total Pan Tropic
granule total
Individual
path/row
combinations
Landsat7 614073 124252 1729
GLS 2000 8749 1904 1729
TRFIC
(ORTHO EXCLUDED)
3067 1420 713
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Archive Cloud CoverArchive Pan Tropic
granule
total
Total cloud
free
granules
Total cloud
> 0 and <=
20%
Landsat7 124252 33313 23385
GLS 2000 1904 1650 217
TRFIC
(ORTHO
EXCLUDED)
1420 1018 340
In this report the three Lansat data archives will
be compared to determine if and when cloud free
or nearly cloud free granules can be acquired for
the pan-tropics during specific time windows.
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Tropical GLS 2000 data set summary
0
100
200
300
400
500
600
700
800
1999 2000 2001 2002
Year
# o
f g
ran
ule
s a
cq
uir
edThe GLS 2000
data set was
acquired over a
four year period
ranging from 1999
to 2002.
Most of the data
(76%) was acquired
from 2000 to 2001.
Better than in
1990
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Ortho ETM Peak Acqusition month by region
Peak greenness is not likely to occur at the same
time so we split the pan tropics into 4 regions:
• region 1 is North, Central and South America
• region 2 is Africa
• region 3 is South Asia
• region 4 is Southeast Asia
Month in which Ortho ETM acquisition peaks for
each region:
region 1 = August
region 2 = May
region 3 = October
region 4 = September
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GLS 2000 Acquisitions By Month for each region
0
20
40
60
80
100
120
140
1 2 3 4 5 6 7 8 9 10 11 12
1
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6 7 8 9 10 11 12
2
0
10
20
30
40
50
60
70
1 2 3 4 5 6 7 8 9 10 11 12
3
0
10
20
30
40
50
60
70
80
1 2 3 4 5 6 7 8 9 10 11 12
4
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Southeast Asia GLS 2000 acquistions by Month
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Africa GLS 2000
By Month
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South and Central
America GLS 2000 by Month
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GLS 2000 Peak Acquisition Month Comparison
Ortho Landsat 7
1 29 124
2 19 107
3 26 62
4 17 67
granules in peak monthComparison of granules in the
GLS 2000 and granules available in
the Landsat 7 archive using the
following criteria:
•target year = 2000
•cloud = 0
•month = target phenology
In region 2 19 granules are in the
GLS 2000 for the peak acquisition
month. Landsat 7 collected 107
cloud free images in the same
region and month.
The Landsat7 archive was
underutilized when selecting data
for the pan-tropical portion of the
ortho ETM archive.
Region
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Detailed Analysis for 2005
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GLS2005 archive by year
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GLS2005 acquisition by year—Best effort yet
0
500
1000
1500
2000
2500
3000
3500
4000
2003 2004 2005 2006 2007 2008
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Coverage Map: All Granules
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Coverage Map: Landsat 5
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Coverage Map: Landsat 7
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Coverage Map – Transition areas between Landsat 5 and 7
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Granules by Year of Acquisition
Year Count %2003 23 0.24%2004 1272 13.55%2005 3179 33.86%2006 3462 36.87%2007 1429 15.22%2008 25 0.27%
7913 (84.27%) of acquisition 2005 +/- 1 year
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Coverage Map: 2005 +/- 1 Year
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Coverage Map: > 2005 +/- 1 Year
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Granules by Month of Acquisition
Month Count %
1 488 5.20%
2 497 5.29%
3 634 6.75%
4 573 6.10%
5 764 8.14%
6 962 10.24%
7 1571 16.73%
8 1432 15.25%
9 1117 11.90%
10 575 6.12%
11 465 4.95%
12 312 3.32%
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SE Asia: Acq. Month
Month Count
January 63
February 67
March 78
April 46
May 59
June 32
July 37
August 66
September 44
October 53
November 59
December 54
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S. America: Acq. Month
Month Count
January 64
February 56
March 31
April 70
May 79
June 97
July 108
August 75
September 52
October 28
November 19
December 31
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Africa: Acq. Month
Month Count
January 115
February 92
March 164
April 128
May 133
June 63
July 25
August 35
September 50
October 100
November 133
December 76
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Coverage Map: Path Row Tiles Freq = 1
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Coverage Map: Path Row Tiles Freq > 1
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Needs for Better Temporal Fidelity
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Borneo – Cloud Cover
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GLS 2005GLS 2000GLS 1990
Clouds – Western part of images all three dates
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Composite Band 5:RGB: 1990, 2000, 2000
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Composite Band 5:RGB: 2000, 2000, 2006
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Composite Band 5:RGB: 1990, 2000, 2005
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GLS 1990p118r57June 14, 1991
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Landsat 4 TMp118r57June 19, 1990
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GLS 2000p118r57Feb. 25, 2001
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Landsat 7 ETM+p118r57May 19, 2002
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GLS 1990p118r57June 14, 1991
Landsat 4 TMp118r57June 19, 1990
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Fill with ASTER VNIR
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SE Asia Uplands: Shifting Cultivation (Laos)
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GLS 2000 and 2005 Data
Dec. 21, 2006Nov. 2, 2000
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NDVI CompositeRGB: 2000-2001-2000
2000 – 2001 Areas in “red”Non-veg 2001
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NDVI CompositeRGB: 2000-2006-2000
Dynamic notSeen in 2006
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Landsat 7: Nov. 8, 2002RGB: 4, 3, 2
2002 = Cleared
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NDVI CompositeRGB: 2000-2002-2000
2000 - 2002Areas in “red”Non-veg 2002
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NDVI CompositeRGB: 2000-2006-2000
Dynamic notSeen in 2006
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NDVI CompositeRGB: 2001-2002-2006
2001 – 02 - 06
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Landset Satellite Data 1990 & 2000
Courtesy: David Skole (MSU)
2000 Area change (%) from 1990
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VCF 30m
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Current LandSat imagery used way points are small yellow dots
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Zoom in at high resolution
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Carbon Account System
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Region east of Kingaroy, north of Nanango. Small blue dots are waypopints. White is non forest/trees. Carbon sequestration range: 4-8 tCO2e per ha per yr (light to dark)
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Earth Observation System
Satellite Database Data Analysis
Carbon ModelsCarbon Accounts
WWW
MarketsBuyers
Carbon Sellers
An Operational System using EO
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Viet Nam
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Vietnam Reforestation: Acacia sp.
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IKONOSFieldwork: Aug. 2007Mapping Afforestation Parcels
Acacia – Planted 2003
Lychee – Planted 1996 / 2005Bare area – Cassava until 2005
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Thailand
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