Estimating the effective spatial resolution of an AVHRR time series

International Journal of Remote Sensing



A method is proposed to estimate the spatial degradation of geometrically rectified AVHRR data resulting from misregistration and off-nadir viewing, and to infer the cumulative effect of these degradations over time. Misregistrations are measured using high resolution imagery as a geometric reference, and pixel sizes are computed directly from satellite zenith angles. The influence or neighbouring features on a nominal 1 km by 1 km pixel over a given site is estimated from the above information, and expressed as a spatial distribution whose spatial frequency response is used to define an effective field-of-view (EFOV) for a time series. In a demonstration of the technique applied to images from the Conterminous U.S. AVHRR data set, an EFOV of 3·1km in the east-west dimension and 19 km in the north-south dimension was estimated for a time series accumulated over a grasslands test site.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Estimating the effective spatial resolution of an AVHRR time series
Series title International Journal of Remote Sensing
DOI 10.1080/01431169608949122
Volume 17
Issue 15
Year Published 1996
Language English
Publisher Taylor & Francis
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 10 p.
First page 2971
Last page 2980