The paper presents main goals of FieldFact project performed in the frame of 6^th Framework Programme of European Commission. The project promotes and demonstrates use of European satellite systems EGNOS and Galileo in modern agriculture. Second part of the paper gives some proposals for procedure of validation of GPS equipment to ensure the required level of accuracy and reliability for parcel area measurements during on-the-spot control for IACS and for precise farming. The proposed procedure and programme of training of observers for certification of proficiency to confirm the minimum required professional skill is also discussed.

3-10