A new method for high accuracy navigation of NOAA AVHRR imagery

A method to produce rectified Advanced Very High Resolution Radiometer (AVH RR) datasets is proposed, using both the orbital model and identification o f ground control points (GCPs), involving a single image transformation fro m the raw imagery. The ability of the orbital model to determine the geogra phical co-ordinates of pixels in a raw AVHRR image was tested, using a tota l of 1098 GCPs in 24 AVHRR images. Five of the 24 images were also rectifie d using the method proposed, using a newly identified set of GCPs. The diff erences between the geographical co-ordinates of the existing GCPs and thos e determined by the new method are calculated and discussed.