Prediction of Backscatter and Emissivity of Snow at Millimeter Wavelengths.
Abstract
In both the active and passive microwave remote sensing of snowpacks, volume scattering effects due to medium inhomogeneities play a dominant role in the determination of the radar backscattering cross sections and the brightness temperatures. Two theoretical models have been developed to characterize snowpacks: (1) a random medium with a variance, a horizontal correlation length, and a vertical correlation length and, (2) a homogeneous dielectric containing discrete scatterers. The earth terrain is then modeled as layers of such scattering media bounded by air above and a homogenous half-space below. The development of the theoretical approach is guided by the motivation that data set obtained in a field and plotted as functions of frequency, angle, and polarization must be matched with same set of parameters characterizing the same field.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA116448
Entities
People
- Jin Au Kong
- R. T. Shin
Organizations
- Massachusetts Institute of Technology