Non-destructieve bepaling van gewaseigenschappen met behulp van multispectrale scanning

The spectral distribution of radiation reflected by crops in the visible light region and the near infrared contains information concerning crop structure and the optical properties of the leaves and the bounding soil. Non-destructive determination on remote distance of crop properties by means of the measured spectral distribution of reflected...

Systems for automatic computation and plotting of position fixing patterns

In the past ten years there has been a growing tendency to use hyperbolic, circular and 'are of circle patterns for position fixing on water-covered areas. Rijkswaterstaat Communications No. 2 discusses the computations associated with the Decca pattern for the Netherlands Delta Project as one ofthe first examples ofthe use of electronic...