RFM Flags: Viewing downward in plane-parallel atmosphere

NAD Flag

26SEP22

Enabled

Disabled

Restrictions
SFC Flag must also be enabled.
Incompatible with FOV, GEO, GRA, HOM, LOS, TAB, and ZEN Flags.

Notes
  1. The plane parallel assumption allows several simplifications: no refraction, no field-of-view effects, analytical Curtis-Godson path parameters.
  2. The SFC flag is required and, unless altered by a separate *SFC section, default values of of surface temperature and emissivity are assumed.
  3. It is also possible to define a nadir view with the full spherical atmosphere calculations, replacing *TAN section label with *ELE and setting an elevation angle −90.
  4. Use of FLX Flag redefines NAD flag.

Bugs
Bug#2 (Fixed v5.01)