RFM Flags

FVZ Flag: FOV Function Represents Refracted Tangent Heights

11OCT17

Enabled
Regard .fov file as containing FOV-shape after refraction (i.e. strictly only valid for a particular tangent height view)

Disabled
Regard .fov file as containing FOV-shape as projected from satellite (normal usage, valid for all tangent heights since distortion due to refraction will be taken into account)

Restrictions
FOV Flag must also be enabled.

Notes
  1. Although it represents an approximation, using this flag with multiple tangent heights when the FOV is tabulated as some regular division of the tangent height spacing (eg 1.5km FOV tabulation and 3km tangent height spacing) allows the same ray paths to be reused for simulating views at adjacent tangent heights, so saving both time and memory.

Bugs
[none reported]