Name

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bidr

Purpose (one Line)

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Compute the bi-directional reflectance (old Hapke formula).

Description

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Category

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  Miscellaneous

Calling Sequence

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ans = bidr(w,emu,smu,g,holes,pzero)

Inputs

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w - Single scattering albedo.
emu - Cosine of the emission angle.
smu - Cosine of the incidence angle.
  g - Phase angle, in radians.
holes - Compaction parameter value (1981 formalism).
pzero - Value of the single particle phase function.

Optional Input Parameters

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None.

Keyword Parameters

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None.

Outputs

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Return value is the bi-directional reflectance.

Common Blocks

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None.

Side Effects

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None.

Restrictions

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      Any input may be a vector. If more than one is a vector then the
      lengths must match. The return will have the same dimensions as
      the input.

Procedure

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Modification History

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      Written 1991 December, by Marc W. Buie, Lowell Observatory
      97/08/21, MWB, fixed phase angle bug, added g as input argument.