Title :
Global Simplified Atmospheric Radiative Transfer Model at L-Band
Author :
Jinzheng Peng ; Kim, E. ; Piepmeier, J.
Author_Institution :
Morgan State Univ., Baltimore, MD, USA
Abstract :
A simplified atmospheric radiative transfer model at L-band has been developed for the Soil Moisture Active/Passive (SMAP) forward brightness temperature (level 1) simulator. The upwelling and downwelling brightness temperatures and the total loss factor of the atmosphere are modeled as polynomial functions of pressure, temperature, and water vapor density near the Earth´s surface, as well as incidence angle. The model has been developed and verified by using global radiosonde data, and the model error is within the 0.1 K error budget (atmosphere portion) of the SMAP brightness temperature (Level 1B) product.
Keywords :
atmospheric humidity; atmospheric pressure; atmospheric temperature; radiative transfer; Earth surface; SMAP forward brightness temperature simulator; Soil Moisture Active Passive simulator; atmospheric pressure; atmospheric temperature; atmospheric water vapor density; downwelling brightness temperature; global simplified atmospheric radiative transfer model; incidence angle; polynomial function; total loss factor; upwelling brightness temperature; Atmospheric measurements; Atmospheric modeling; Brightness temperature; L-band; Microwave radiometry; Temperature measurement; Terrestrial atmosphere; Electromagnetic propagation; microwave radiometry; radiative transfer model (RTM);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2012.2208213
