1205 
5 - CONCLUSION 
There is a high interest for vegetation monitoring either for scientific purposes or for economical applications. 
Many of them already make an intensive use of satellite data. They may be improved thanks to instruments 
specially designed for these applications. In addition to the relevant ESA programmes, CNES is proposing four 
optical instruments whose characteristics are adapted to these objectives. Three of them are under development 
and will be available in 1997. 
REFERENCES 
ACHARD F, MALINGREAU J.P, PHULPIN T„ SAINT G., SAUGEER B., SEGUIN B. and VIDAL MADJAR 
D., 1991 : The VEGETATION instrument onboard SPOT 4 : A mission fot global monitoring of the 
continental biosphere, CNES report, LERTS, 83 pp 
BARET F., S. JACQUEMOUD and C. LEPRIEUR, 1992 : Modeled analysis of biophysical nature of spectral 
shifts and comparison of information content of broadbands, Remote Sens. Environ.,41:133-142 
CURRAN P.J, 1989 : Remote sensing of foliar chemistry, Remote Sens. Environ., 30:271-278 
DURPAIRE J.P, T. GENTET, T. PHULPIN and M. ARNAUD, 1992 : SPOT4 VEGETATION Instrument : 
Vegetation monitoring on a global scale, 43 rd congress of the International Astronautical Federation, August 
28 - September 5, 1992, Wahington DC 
KERGOAT L., A. FISCHER, S. MOULIN and G. DEDIEU, 1994 : Satellite measurements as a control for 
vegetation carbon budget, submitted to Tellus 
MAAS S„ 1988 : Using satellite data to improve model estimates of crop yields, Agron. J., 80, 655-662 
MEYER ROUX J, 1992 :Remote sensing applied to agriculture : state-of-the art and new trends, proceedings of 
the central symposium of the ISY conference, held in Munich, Germany, 30 March-4 April 1992, ESA-SP-341, 
July 1992 
PHULPIN T. and J. NOILHAN, 1989 : Use of AVRR and METEOSAT data for the determination of land 
surface parameters, Adv. Space Res., 9, 269-274 
PRICE J., 1991: On the value of high spectral resolution measurements in the visible and near infrared , 
Proceeedings of the 5thColl. Of Physical measurements and spectarl signatures in remote sensing, courcheval, 
January 1991, ESA SP Report 
RUNNING S.W, R.R NEMANI, B.L PETERSON, L.E BAND, D.F POTTS, L.L PIERCE and M.A 
SPANNER, 1989 : Mapping regional forest evapotranspiration and photosynthesis by coupling stallite data and 
ecosystems simulation, ecology, 70, 4, 1090-1101 
SAINT G„ T. PHULPIN, T. GENTET, 1993: Vegetation onboard SPOT 4 : a mission for global study of the 
biosphere. Proceedings of the 6th AVHRR data users meeting, Belgirate TREES, 1992 : TREES : TRopical 
Ecosystem Environment observations by satellites, ajoint project of the Commission of the European 
Communities (CEC) and The European Space Agency (ESA), TREES series A : Technical document, Strategy 
proposal 1991-93,CD-NA 14327-EN-C, 20 pp 
WOODING M., 1993 :ESA, Earth Observation Programme Board, Short report on the main outcome of the 
ERS-1 Symposium in Hamburg, 11-14 October 1993,ESA/PB-EO (93)77