Journal of Remote Sensing & GIS

Robert Cifelli

Publications

• Research Article
  Downscaling Advanced Microwave Scanning Radiometer (AMSR-E) SoilMoisture Retrievals Using a Multiple Time-Scale Exponential RainfallAdjustment Technique
  Author(s): Chengmin Hsu, Lynn E. Johnson*, Robert J. Zamora, Timothy Schneider and Robert CifelliChengmin Hsu, Lynn E. Johnson*, Robert J. Zamora, Timothy Schneider and Robert Cifelli
  
  Hydrologic response at all resolutions is controlled by physical processes. Accurately capturing the physical process at a high-resolution is essential for down scaling many satellite observations at coarse resolutions. In this paper, a four-dimensional process representative soil moisture downscaling model is developed to downscale the Advanced Microwave Scanning Radiometer-EOS (AMSR-E) 25 km resolution soil moisture product. The model is composed of the calculation of an antecedent precipitation accumulation (APA) index to capture soil moisture spatial and temporal variations at the 500 m resolution, and the application of a Geographic Information System (GIS) to simulate physical processes which can regulate soil moisture changes throughout the watersheds. APA index, as a representation of the provisional value of soil moisture, is calculated by adopting an exponential formulation .. View More»
  DOI: 10.4172/2169-0049.1000139

  Abstract PDF