Note relating to OPGC data to maintain the integrity of the OPGC data base and to ensure its perenniality

	- OPGC data are accessible freely and free of cost, for public research and teaching applications.
	- The users of OPGC data must verify that the data they are using is intended for publication; refer to the advice of PIs.
	- The source of OPGC data used in the framework of a publication must be mentioned in an explicit way in the acknowledgment section by a sentence of the type: « The authors would like to acknowledge OPGC for providing the lidar data used in this study ».
	- For the use of OPGC data requiring a specific interpretation work and discussions essential to the exploitation of the data, it is required that relevant PIs be proposed co-authorship in related publications.
	- The use of data, in synergy with OPGC data, originating from another organization requires specific mention of that source of data.

Citation for puycloud is available here:
http://opgc.fr/vobs/vo/so_forms.php?name=puycloud