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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 8.11: TSKY—Clear Atmosphere

Code Name: TSKY_ClearAtmos.m

Description: Using a Standard Atmosphere model, code computes the brightness temperature of the atmosphere as would be observed by a ground-based upward-looking radiometer, under clear-sky conditions, along direction Θ relative to the zenith (0 < Θ < 80 °), from sea-surface height z1 = 0 to z2 = 32 km, at any frequency 0 < f < 1000 GHz.

Input Variables:

  T0:    Sea-surface temperature (°C)
  P0:    Sea-surface total barometric pressure (mbar)
  ρ0:    Sea-surface total water vapor density (g/m3)
  f:    Frequency (GHz)
  Θ:    Zenith angle (degrees)

Output Products:

  TSKY:    Sky radiometric temperature (K)

Book Reference: Section 8-4 and Eqs. (8.23) and (8.24)

Code: module8_11.m