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Principal Authors:
Fawwaz T. Ulaby
David G. Long,

Contributing Authors:
William Blackwell
Charles Elachi
Adrian Fung
Chris Ruf
Kamal Sarabandi
Jakob van Zyl
Howard Zebker

Language: English
ISBN: 978-0-472-11935-6


Code 11.2: S2RT/R Backscattering from Rayleigh Layer with Distinct Upper Boundary

Code Name: S2RTR_DistinctUB.m

Description: Code computes σ0 vvand σ0 hhfor a weakly scattering Rayleigh layer with albedo a ≤ 0.2. The layer is above a ground surface and its upper and lower interfaces are characterized by the PRISM model (Code 10.5).

Input Variables:

  ε2 = ε2 '- jε2 '':    Dielectric constant of middle layer (unitless)
  ε3 = ε3 '- jε3 '':    Dielectric constant of ground surface (unitless)
  f:    Frequency (GHz)
  s1:    rms height of top surface (m)
  s3:    rms height of ground surface (m)
  a:    Single-scattering albedo of Rayleigh layer (unitless)
  κe:    Extinction coefficient of Rayleigh layer (Np/m)
  d:    Layer thickness (m)
  Θ:    Incidence angle (degrees)

Output Products:   σ0 hh(Θ) and σ0 vv(Θ)

Book Reference: Section 11-6.6 and Eq. (11.79)

Code: module11_2.m