1. Daily MODIS V006 BRDF, Albedo, NBAR Status and Updates
Zhuosen Wang, Crystal Schaaf, Qingsong Sun, Yan Liu,
Alan Strahler
University of Massachusetts Boston,
Boston University, NASA/GSFC
And the large contingent of colleagues who have contributed to the development and validation of MCD43

2. Daily MODIS V006 BRDF, Albedo, NBAR Status and Updates
MCD43A
Albedo (ECV), NBAR (phenology, landcover, biomass, clear-sky), BRDF (anisotropy, structure, clumping) etc.

3. Daily MODIS V006 BRDF, Albedo, NBAR
DAILY MCD43A
Was originally proposed as a daily product
Retrieved each day utilizing all high-quality, multi-date, multi- angle, cloud-free surface reflectances from a rolling 16-day period
Day of interest is center date
Fit semi-empirical Ross Thick Lis Sparce Reciprocal BRDF Model
Number of angularly well distributed obs (RMSE, WoD)
Weighted by quality, obscov, vicinity to day of interest
Produced in 10˚ tiles on a 500m sinusoidal grid

4. Daily MODIS V006 BRDF, Albedo, NBAR
DAILY MCD43A
Extensive Quality flags
Byte, not bit packed (mostly - dates used)
Snow albedo retrieval (utilizing MO/YD10)
Conservative high quality full inversion retrievals
Poor quality back up magnitude inversion algorithm uses more recent high quality retrieval as a priori BRDF shape
USE the QA!!

5. Daily MODIS V006 BRDF, Albedo, NBAR
Daily CMG BRDF, Albedo, NBAR (MCD43D)
30arc-second global
Separate full retrieval
Uncertainty measures
MCD43C (0.05 degree CMG) is average of underlying parameters
Quality based on majority of underlying qualities
MCD43_GF 30arc-second snow-free, gap-filled global CMG
V005 version is available

6. Red
Blue
Green
V006 True color
NBAR
DOY 201, 2003
V006 Shortwave WSA
DOY 201, 2003

7. MCD43 Collection V006 Eight Day -> Daily
Collection V005 eight day product
oldest Dynamic observation stream newest
day 1, day day 9, … day 16, day xxx … day 24 , day 25 … day xxx+15 … … …
… …
Collection V006 daily product
oldest Dynamic observation stream newest
day -8, day -7…DOI…, day 8, day xxx … day 16 , day 17 … day xxx+15 … … … …
… …
Observation weights
Temporal, observation coverage, band quality

8. Updates: Number of input observations
The first 4 layers
V006:
All the available layers
Tile h16v01 Number of observations DOY 240

10. Extensive Validation CEOS/WGCV/Land Product Validation
BSRN (gold standard of tower albedo measurements)
Ameriflux, Surfrad, NEON, ARM, Fluxnet etc.
Spatial representativeness of sites (Román et al., 2009)
Multi-angle Airborne measurement (CAR, GLiHT etc)
Lidar Measurements of Structure (DWEL, CBL, Airborne)

11. Validate MODIS/Landsat albedo using CAR
In general, the satellite derived estimates meet the accuracy requirements established for the high-quality MODIS operational albedos at 500 m (the greater of 0.02 units or ±10% of surface measured values).
Román et al., IEEE Transactions on Geoscience and Remote Sensing,2013

12. Validation Sites CCP: Canadian Carbon Program Site Name Lat Lon
MODIS Tile
Land Type
Flux Networks
BC-Campbell River 1949 Douglas-fir
49.867
h09v04
Evergreen Needleleaf Forest
CCP
SK-1998 Fire
54.092
h11v03
Wetzstein
50.454
11.458
h18v03
IMECC
Griffin- Aberfeldy-Scotland
56.607
-3.798
h17v03
AmeriFlux
Tumbarumba
h30v12
Evergreen Broadleaf Forest
OzFlux
Hesse Forest- Sarrebourg
48.674
7.066
h18v04
Deciduous Broadleaf Forest
Walker Branch
35.959
h11v05
SK-1989 Fire
54.254
Mixed Forests
Bily Kriz- Beskidy Mountains
49.502
18.537
h19v04
Hainich
51.079
10.452
Harvard Forest
42.538
h12v04
Mixed Forest
Ameriflux
Las Majadas del Tietar
39.942
-5.773
h17v05
Closed Shrublands
Skukuza
31.497
h20v11
Savannas
CarboAfrica
El Saler-Sueca
39.276
-0.315
Croplands
Langerak
52.004
4.806
Dripsey
51.987
-8.752
Grasslands
Fort Peck
48.308
h11v04
SURFRAD
Boulder
40.050
BSRN
Cottonwood
43.950
h10v04
Barrow
71.323
h12v01
Tundra
Imnaviat
68.613
h12v02
LTER
Desert Rock
36.620
h08v05
Desert
IMECC:
Infrastructure for Measurements of the European Carbon Cycle

13. Validation Results Mixed Forest Needleleaf Forest Broadleaf Forest
Savanna/
Shrubland
Grassland/
Cropland/
Tundra
Desert
All quality
Bias
0.0071
0.0047
0.0028
RMSE
0.0187
0.0241
0.0162
0.0129
0.0293
0.0118
Full inversion
0.0086
0.0025
0.0152
0.016
0.0123
0.0136
0.0211
0.0108
Magnitude inversion
0.0008
0.0107
0.0215
0.0294
0.0203
0.0096
0.0375
0.0218
Snow free
0.0033
0.0029
0.0183
0.0189
0.0151
0.0224
0.0117
Snow covered
N/A
0.0175
0.0274
0.0487
0.0465
(0.0465)*
* RMSE during fully snow covered period

14. Spatial Representativeness Harvard Forest

15. Validation Efforts
Daily V006 NBAR (500m MCD43A4) data for tile h12v04 on 5 Aug 2007 (DOY ). Harvard Experimental Forest Petersham MA

22. V006 NBAR (500m MCD43A4) data for tile h12v02 on 6 Sep 2009 (DOY ) over the Imnaviat, Alaska Flux Site

23. Gap-filled Snow-free MODIS Albedo V005
White-sky Albedo DOY RGB

24. Gap-filled Snow-added-back-in MODIS Albedo
White-sky Albedo DOY

25. Gap-filled Snow-free MODIS Albedo Quality V005
White-sky Albedo DOY QUALITY!!!!!!!!

26. Surface Structure and Anisotropy Lidar Validation Efforts
Alan Strahler