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A technique for mapping downward longwave radiation using satellite and ground-based data in the tropics

Author

Listed:
  • Masiri, I.
  • Janjai, S.
  • Nunez, M.
  • Anusasananan, P.

Abstract

This paper presents a technique for mapping monthly average hourly downward longwave (LW↓) irradiance using ground- and satellite-based data. A model relating LW↓ irradiance to a satellite derived-brightness temperature of the earth-atmospheric system, relative humidity and ambient air temperature was formulated. This model was validated against LW↓ irradiance obtained from measurements at 4 sites in the tropics and discrepancy in terms of root mean square errors and mean bias errors was found to be 1.89% and −0.69%, respectively. After the validation, the model was used to calculate monthly average hourly LW↓ irradiance over Thailand and the results were displayed as LW↓ maps. These maps reveal the influence of various factors on LW↓ irradiance.

Suggested Citation

  • Masiri, I. & Janjai, S. & Nunez, M. & Anusasananan, P., 2017. "A technique for mapping downward longwave radiation using satellite and ground-based data in the tropics," Renewable Energy, Elsevier, vol. 103(C), pages 171-179.
    • Handle: RePEc:eee:renene:v:103:y:2017:i:c:p:171-179
    DOI: 10.1016/j.renene.2016.11.018
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