Comment on 'A simple method to account for off-nadir-scattering in the NOAA/NASA Pathfinder AVHRR Land Data Set' by Seaquist and Olsson (1998)
A recent contribution to the Journal suggested that corrections for off-nadir scattering in NOAA-NASA Pathfinder AVHRR Land Data Set may be achieved through polynomial fitting techniques. The method developed is based on assumptions which may not be valid and provides few advantages over the widely-adopted Maximum Value Compositing procedure. While simple and expedient, the polynomial model does not adequately account for the complex surface scattering processes which result in the directional phenomena observed in AVHRR channel 1 and 2 data and does not provide consistent NDVI values.
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