Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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A Representativity Test on the Pyranometer Measurement of Surface Solar Insolation Through Satellite Observation

  • Yeom, Jong-Min (Dept. of Environmental Atmospheric Science, Pukyung National University) ;
  • Han, Kyung-Soo (Dept. of Satellite Information Science, Pukyung National University) ;
  • Park, Youn-Young (Dept. of Satellite Information Science, Pukyung National University) ;
  • Kim, Young-Seup (Dept. of Satellite Information Science, Pukyung National University)
  • Published : 2006.10.31
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Abstract

Surface Solar Insolation is important for vegetation productivity, hydrology, crop growth, etc. In this study, Surface Solar Insolation is estimated using Multi-functional Transport Satellite (MTSAT-1R) in clear and cloudy conditions. For the Cloudy sky cases, the surface solar insolation is estimated by taking into account the cloud transmittance and multiple scattering between cloud and surface. This model integrated Kawamura's model and SMAC code computes surface solar insolation with a $5\;km{\times}5\;km$ spatial resolution in hourly basis. The daily value is derived from the available hourly Surface Solar Insolation, independently for every pixel. To validation, this study uses ground truth data recorded from the pyranometer installed by the Korea Meteorological Agency (KMA). The validation of estimated value is performed through a match-up with ground truth. Various match-up with ground truth. Various match-up window sizes are tested with $3{\times}3,\;5{\times}5,\;7{\times}7,\;9{\times}9,\;10{\times}10,\;11{\times}11,\;13{\times}pixels to define the spatial representativity of pyranometer measurement, and to consider drifting clouds from adjacent pixels across the ground station during the averaging interval of 1 hour are taken into account.

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References

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