International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004 
4. CSP PRODUCTS 
4.1 Service Portfolio 
The CSP Service Portfolio, that is, the list of products delivered 
by the Core Service, including the delivery date, area and time 
period covered, space and time resolution, and user 
identification is shown in Figure 6. 
    
   
    
       
  
Products FT 
36812359 12359 12 
GLOBAL, 2002 - 2003 
GLOBAL, 1998 - 2003 
   
  
    
  
  
  
LAI, fAPAR, fcover 
  
  
      
   
      
  
  
  
Surface Albedo | [GLOBAL 2002 - 2003 10-day ONC 
GLOBAL, 1998 - 2003 
EUROPE * AFRICA, 1993 - 2003 10-day 
oM .. ASIA 1999-2009 — i 
Surface Reflectance AFRICA + Boreal EURASIA, 2002-2003 3 months |! km OLF 
  
  
  
  
  
AFRICA * Boreal EURASIA, 1998 - 
       
      
     
   
    
  
  
   
   
  
      
  
4 to 10|50 km METEOSAT +[ONC 
FY-2 + INSAT +|OFM 
NOAAJAVHRR 
METEOSAT 
EUROPE + AFRICA 
_|__|3 months 
| GLOBAL, whole 2000 
- |EUROPE * AFRICA, 1993 - 2003 
ASIA, 1999 - 2003 
Down-welling — Short- 
wave Radiation (DSR)| 
flux 
    
   
    
   
    
    
  
  
     
   
  
   
      
     
  
   
METEOSAT+ |ONC 
____|NOAMAVHRR 
km|METEOSAT 
  
Downwelling — Long- 
wave Radiation (DLR) 
fux 
  
   
  
2004 2005 2006 
A EB 
Land Surface Temperat{ | | EUROPE + AFRICA, 2000 
| EUROPE 
1997 - 2003 month N 
5 km 
| satellite 
Soil Moisture + - [7- j |S0km 
arid 25m. 
AL. 1 week 100 km AMSR 
,2003 
| [GLOBAL, 2004 
  
     
    
   
     
      
Multi-sensor 
  
     
  
   
  
    
  
  
     
    
      
  
  
  
Precipitation 2000 1 
T |GLOBAL, 2003 ONC 
| | | 1 [GLOBAL, 1997 - 2003 
| EUROPE + AFRICA, 1993 - 2003 1 day Skm  sub|METEOSAT 
E "ld |. ASIA. 1999 - 2003 | .— [Issente — |. mna "hp 
Evapotranspiration EUROPE * AFRICA, 1993 - 2003 5 km sub]METEOSAT OFM 
| | |ASIA, 1999 - 2003 satellite OLF 
tr | ; ER der JONCE 
Burnt Areas AFRICA + Boreal EURASIA, km VGT-ATSR OLF 
AATSR-MERIS 
2000 
AFRICA + Boreal EURASIA 
2000 - 2003 
  
  
  
  
  
  
10-day — i km [VOT 
  
Water Bodies 
| 
i AFRICA, 2000 - 2003 
* The date of delivery Is indicated by the left border of the coloured cell. 
Figure 6. CSP Product Portfolio 
The Service Portfolio includes vegetation, albedo, surface 
reflectance, downwelling shortwave and longwave radiation 
fluxes, soil moisture, precipitation, evapotranspiration, burnt 
areas and water bodies products, which are briefly described 
below. 
42 Vegetation : LAI, fcover, fAPAR 
The leaf area index (LAI) is defined as half the total foliage 
area per unit of ground surface. The fcover is the fraction of 
ground surface covered by vegetation (see an illustration in 
Figure 7). The fAPAR is defined as the fraction of 
photosynthetically active radiation absorbed by vegetation for 
photosynthesis activity. The fAPAR can be instantaneous or 
daily. 
E 4 ax 
    
    
0 fcover 
Figure 7. Global map of fcover derived from POLDER 
measurements, June 1997. 
The production of these parameters will rely on the outputs of 
the current ESA / GLOBCARBON and FP5 / CYCLOPES 
projects, which are available, respectively, at VITO and 
MEDIAS-France. 
The retrieval algorithm of LAI and fAPAR for GLOBCARBON 
is based upon a radiative transfer model and relationships with 
vegetation indices. Parameters are estimated using a look-up- 
table. In the CYCLOPES project, the inversion of a radiative 
transfer model to retrieve LAI, fcover and fAPAR is achieved 
using neural networks. 
4.3 Albedo 
The albedo is the fraction of the incoming solar radiation 
reflected by the land surface, integrated over the whole viewing 
directions. The albedo can be directional (calculated for a given 
sun zenith angle) or hemispheric (integrated over the whole 
illumination directions), spectral (for each narrow band of the 
sensor) or broadband (integrated over the whole solar 
spectrum). 
  
0.12 0.25 
Figure 8. Surface albedo derived from VEGETATION data 
over South-West of France, August 2000. 
The CYCLOPES albedo product is derived from 
VEGETATION / SPOT data. Observations acquired during a 
compositing period are first cloud-screened and corrected for 
atmospheric effects. Then, they are directionnally normalized 
by inversion of a 3-parameter linear bidirectional reflectance 
model, which yields three coefficients: a reflectance nadir- 
zenith, a geometric and a volumetric coefficient. These 3 
coefficients are then used to simulate the reflectance over the 
whole viewing hemisphere, which permits to estimate the 
albedo. 
The surface albedo is also a product of the EWBMS database 
provided by EARS. It is derived from METEOSAT visible (0.3- 
1.5 uum) images, so its spatial resolution is 5 km sub-satellite. 
The first step of the methodology consists of calibrating the 
noon visible METEOSAT image to obtain the daily planetary 
albedo. A darkest pixel method is then used to infer the 
atmospheric optical depth, which permits to infer the surface 
albedo from the planetary albedo. 
4.4 Downwelling Shortwave Radiation Flux 
The Down-welling Short-wave Radiation (DSR) flux (W/m?) at 
the surface level represents the short-wave fraction of the solar 
irradiance (0.3-4 pm) reaching the soil background. The 
calculation of the DSR will be achieved on a hourly basis, at à 
global scale, and at 50 km spatial resolution. 
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