Category:Atmospheric Properties

Several of KRC's default atmospheric parameters might not be optimized for most users:

TAURAT: Ratio of thermal to visible opacity of dust

DUSTA: Single scattering albedo of dust

ARC2: Henyey-Greenstein asymmetry factor

KRC assumes broadband atmospheric opacities. To estimate TAURAT, assuming: 1. VIS/9μm dust opacity ratio is ~2:1 (M. Smith personal communication);

2. 9μm to broadband TIR ratio is 2.5:1 (ratio of maximum and average values of the dust opacity spectrum from Bandfield and Smith, [2003], Figure 3);

THEN:

TAURAT ≈ 0.22 (J. Bandfield).

Values for DUSTA and ARC2 go together, and should not be changed without the other (see the table below). To stick with J. Bandfield’s values, a user can work with:

DUSTA = 0.90

ARC2 = 0.50

Other values reported in this table are acceptable, except for “KRC Default”.