Spatial resolution and frequency of satellite data acquisition for multi-temporal analysis of environment

Details Spatial resolution and frequency of satellite data acquisition for multi-temporal analysis of environment Spatial resolution and frequency of satellite data acquisition for multi-temporal analysis of environment

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..333t&link_type=abstract

Advances in Space Research, Volume 12, Issue 7, p. 333-342.

Physics

Scientific paper

The environmental monitoring capacity by satellite depends upon the spatial resolution and the acquisition frequency it provides. The information on environmental change obtained by Landsat, the first earth observation satellite, was a rectangular reclamation area on Tokyo Bay meaning only a few square kilometers. However, multi-temporal SPOT/HRV data enables newly built small buildings meaning just ten square meters or so to be detected. Environmental changes of the global dimensions are today attracting world attention. In Japan, the major environmental problems are decaying cedar forests due to acid rain, decaying pine forests due to the pine beetle, landslides due to left-cut forests and problem resulting from agricultural chemicals on golf courses. All of these pose a national problem, but each is a phenomenon which covers an area of a few meters square at the largest. The existing earth observation satellites are unable to monitor these seemingly small sized environmental changes. For this, satellites with a spatial resolution of a few meters only or less than a meter are required. This situation becomes apparent when specific cases are examined, and it is expected considering the speed of past sensor development satellite observation systems providing this capacity will most probably be developed by the year 2020.

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