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- Publisher Website: 10.1109/IGARSS.1994.399022
- Scopus: eid_2-s2.0-0028734190
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Conference Paper: Angular characteristics of the Pathfinder AVHRR land thermal data and radiative transfer modeling
Title | Angular characteristics of the Pathfinder AVHRR land thermal data and radiative transfer modeling |
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Authors | |
Issue Date | 1994 |
Citation | International Geoscience and Remote Sensing Symposium (IGARSS), 1994, v. 1, p. 61-63 How to Cite? |
Abstract | In order to understand the angular characteristics observed from the Pathfinder AVHRR land thermal data, a simplified narrow-band radiative transfer model is developed based on a series of approximations for the vertical structures of the atmospheric conditions, which also take into account the directional variation of the upwelling surface radiation. The LOWTRAN-7 code is then applied to validate the present model. Different water vapor content, air temperature and surface temperature are used to simulate the AVHRR ch4/ch5 radiance at the top of the atmosphere as the function of the viewing zenith angle. A directional snow emissivity model and measured emissivity of the agricultural soil are inputed into this model to evaluate the effects of the surface anisotropity on the AVHRR ch4/ch5 radiance. Upwelling radiance usually decreases as the viewing zenith angle increases in thermal regions. However, the angular pattern may reverse when the air temperature is larger than surface temperature. |
Persistent Identifier | http://hdl.handle.net/10722/321222 |
DC Field | Value | Language |
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dc.contributor.author | Liang, Shunlin | - |
dc.contributor.author | Ranson, K. Jon | - |
dc.date.accessioned | 2022-11-03T02:17:28Z | - |
dc.date.available | 2022-11-03T02:17:28Z | - |
dc.date.issued | 1994 | - |
dc.identifier.citation | International Geoscience and Remote Sensing Symposium (IGARSS), 1994, v. 1, p. 61-63 | - |
dc.identifier.uri | http://hdl.handle.net/10722/321222 | - |
dc.description.abstract | In order to understand the angular characteristics observed from the Pathfinder AVHRR land thermal data, a simplified narrow-band radiative transfer model is developed based on a series of approximations for the vertical structures of the atmospheric conditions, which also take into account the directional variation of the upwelling surface radiation. The LOWTRAN-7 code is then applied to validate the present model. Different water vapor content, air temperature and surface temperature are used to simulate the AVHRR ch4/ch5 radiance at the top of the atmosphere as the function of the viewing zenith angle. A directional snow emissivity model and measured emissivity of the agricultural soil are inputed into this model to evaluate the effects of the surface anisotropity on the AVHRR ch4/ch5 radiance. Upwelling radiance usually decreases as the viewing zenith angle increases in thermal regions. However, the angular pattern may reverse when the air temperature is larger than surface temperature. | - |
dc.language | eng | - |
dc.relation.ispartof | International Geoscience and Remote Sensing Symposium (IGARSS) | - |
dc.title | Angular characteristics of the Pathfinder AVHRR land thermal data and radiative transfer modeling | - |
dc.type | Conference_Paper | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1109/IGARSS.1994.399022 | - |
dc.identifier.scopus | eid_2-s2.0-0028734190 | - |
dc.identifier.volume | 1 | - |
dc.identifier.spage | 61 | - |
dc.identifier.epage | 63 | - |