The Third Workshop “Lidar measurements in Latin-America” was held at the University of Cauca, in Popayan, Colombia, between 13 and 15, July 2005. The main objective of this Workshop was focused on instrumentation for lidar systems, quantitative measurements and inversion algorithms, as means the cooperation between differents lidar sites in the frame of ALINE and support international lidar initiatives. Another objectives were the experience exchanges on current environmental monitoring, to promote cooperation and integration of Latin America Lidar community and consolidate the network activities. The two days previous to workshop an intensive course in lidar technique was held. Some students from different education brands and principally from Colombia attended the course in order to enhance their knowledge about remote sensing techniques.

Some specific results were reached from the previous workshop related with the establishment and consolidation of the network agreements:

	A new lidar station was installed in La Paz, Bolivia. This effort was supported by the European Spatial Agency (ESA) and the Atmospheric Physic Laboratory, Universidad Mayor de San Andres.
	NASA have been offered the possibility to install a lidar in Ecuador. This effort was supported by the collaboration of various institutions: Rutgers University, from United State of America; the lidar group from National Space Research Institute (INPE), Brasil; the Climate Monitoring & Diagnostics Laboratory (CMDL), Mauna Loa, United State of America and the Quito’s Geophysical Institute, Ecuador.
	Plans for a new lidar station in Colombia have been discussed. This initiative was supported by ESA and the Inter-American Network for Atmospheric and Biospheric Studies (IANABIS).

Dr. Mauricio Jaramillo (Chair)	PUJ - Cali , Colombia.
Dr. Errico Armandillo	ESA/ESTEC, Holanda.
Dr. Juan C. Antuña	Camagüey Lidar Station, Cuba.
Dr. Eduardo Landulfo	IPEN, Brasil.
Dr. Eduardo Quel	CITEFA, Argentina.
Dr. Alvaro Bastidas (Chair)	Universidad del Cauca, Colombia.
Lic. Edith Rodríguez	Universidad del Cauca, Colombia.
Lic. Elena Montilla	Universidad del Valle, Colombia.
Dr. Efraín Solarte	Universidad del Valle, Colombia.

Lidar technologies and methods
		Laser (solid state, security, optic fiber, spatial, etc.)
		Lidar components (mirrors, opticaldetectors, etc.)
		Acquisition and processing systems (inversion techniques, primary and secondary products, etc.)
		New methods and applications.
		Advanced Technologies.
Fundamental measurements
		Aerosols and clouds (tropospheric and stratospheric aerosols, particle size distribution and concentration, etc.)
		Atmospheric watervapor.
		Temperature.
		Atmospheric Chemistry and trace gases (ozone, greenhouse gases, etc.)
		Wind, turbulence, and gravity waves.
Studies and applications using lidar data
		Boundary layer dynamics and flow measurements.
		Atmospheric Dinamics, Radiative Transfer, etc.
		Radiative forcing and Climatic Change
		Aerosols and Clouds.
		Atmospheric Chemistry and Transport.
		Stratospheric Ozone.
		Stratospheric and Mesospheric measurements.
		Other applications.
Lidar Networking
		Aerosols, clouds, dust, and pollution transport.
		Long –term observations.
		Global Monitoring (terrestrial, aereal and satellite observations).
		Ongoing research and futures requirements.
Lidar in Space Programs
		Current Programs.
		Scientifics and techniques Challenges.
		Inter-comparison with ground lidar observation.