881 
able importance for natural bio-mass production. The new technique presented for estimating the photosynthetic 
activity is quite promising and seem to be more reliable than previous analysis systems. 
The overall system operation is easy and reliable and makes this instrument an optimum tool for 
investigating in open sea as well as in closed basins and in bio-reactors. The validity of Y as an indicator of 
photosyntethic activity must be further checked and extension of this validity to other vegetation species is the 
natural continuation of present work. 
References 
1. Barbini R. et al., 1991. Spectral and time resolved measurements of pollutants on water surface by a 
XeQ laser fluorosensor, EC04 Proceed, in SPIE 1503: 363-374; 
Barbini R. et aL, 1992a. Spectral and time resolved measurements of pollutants on water surface by a 
XeQ laser fluorosensor,, EARSel Adv. in Remote Sensing 1:45-51. 
2. Barbini R. et al. 1993a. A laser induced fluorescence apparatus for remote sensing of sea surface, paper 
presented at Optical Sensing for Environmental Monitoring, Oct 11-14, Atlanta GE . 
3. Barbini R. et al., 1992b. Report of the first LAS FLEUR field campaign for remote sensing of vegetation 
health: ENEA contribution, ENEA report RT/INN/92/41. 
4. Barbini R. et al., 1993b, Report of the second LASFLEUR field campaign for remote sensing of vegeta 
tion health: ENEA contribution, ENEA report RT/INN/93/17. 
5. Barbini R. et al., 1994a, Report of the third LASFLEUR field campaign for remote sensing of vegetation 
health: ENEA contribution, ENEA report in preparation. 
6. Leonard D.A. et al, 1979. Remote sensing of surface water temperature by Raman scattering, Appl. Opt. 
18:1732-1744. 
7. Bazzani M. et al, 1992. Phytoplankton monitoring by laser induced fluorescence, EARSel Adv. in Re 
mote Sensing 1: 106-110. 
8. Lichtenthaler ELK., 1988, The role of chlorophyll fluorescence in the detection of stress condition in 
plants, CRC in Analytical Qiemistry, 19: S25-S85. 
9. Barbini R. et al., 1994b. Laboratory measurements on herbaceous species grown in controlled ampsphere 
by means od the ENEA lidar fluorosensor, paper presented fh this conference. 
10. Gtekalyuk A.M. et al., 1992. Laser remote sensing of phytoplankton photosynthetic activity and chloro 
phyll by using a shipboard lidar system, Proc. SPIE 1922: 391-400. 
11. Chekalyuk A.M. et al., 1991. Laser method for remote sensing of phytoplankton photosynthetic activity 
in situ, Proc. of the 12th Asian Conference on Remote Sensing (ACRS), Oct 30 - Nov 5, Singapore. 
12. Bolhar H.K. et al., 1989. Chlorophyll fluorescence as a probe of the photosynthetic competence of leave 
in the field: a review of current instrumentation, Functional Ecology, 3: 497-514. 13 
13. Barbini R., Di Marco G., Massacci A., Loreto F„ et al. ENEA internal report in preparation.