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Surface emissivity effects on thermodynamic retrieval of ir spectral radiance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Liu, Xu Smith, William L. Zhou, Daniel K. Larar, Allen M. |
| Copyright Year | 2006 |
| Description | The surface emissivity effect on the thermodynamic parameters (e.g., the surface skin temperature, atmospheric temperature, and moisture) retrieved from satellite infrared (IR) spectral radiance is studied. Simulation analysis demonstrates that surface emissivity plays an important role in retrieval of surface skin temperature and terrestrial boundary layer (TBL) moisture. NAST-I ultraspectral data collected during the CLAMS field campaign are used to retrieve thermodynamic properties of the atmosphere and surface. The retrievals are then validated by coincident in-situ measurements, such as sea surface temperature, radiosonde temperature and moisture profiles. Retrieved surface emissivity is also validated by that computed from the observed radiance and calculated emissions based on the retrievals of surface temperature and atmospheric profiles. In addition, retrieved surface skin temperature and emissivity are validated together by radiance comparison between the observation and retrieval-based calculation in the window region where atmospheric contribution is minimized. Both simulation and validation results have lead to the conclusion that variable surface emissivity in the inversion process is needed to obtain accurate retrievals from satellite IR spectral radiance measurements. Retrieval examples are presented to reveal that surface emissivity plays a significant role in retrieving accurate surface skin temperature and TBL thermodynamic parameters. |
| File Size | 2924117 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070000537 |
| Archival Resource Key | ark:/13960/t1ck3cf4s |
| Language | English |
| Publisher Date | 2006-01-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing In Situ Measurement Meteorological Satellites Surface Temperature Satellite Observation Atmospheric Moisture Sea Surface Temperature Temperature Profiles Remote Sensing Atmospheric Temperature Spectrum Analysis Atmospheric Boundary Layer Spectral Emission Infrared Radiation Thermodynamic Properties Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
