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Table 1
Calculated maximum trail optical depths and ratios between observed and calculated trail optical depths for three velocity models (Crifo & Rodionov 1997; Kelley et al. 2008; Agarwal et al. 2010) and two size distribution indices.
| Year | Velocity model | Optical depth τ | Ratio between observed and modeled τ | ||||
| Size distn | α = −3.5 | α = −3.7 | α = −4.1 | α = −3.5 | α = −3.7 | α = −4.1 | |
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| 2004 | Crifo | 2.5 × 10-9 | 2.1 × 10-9 | 1.2 × 10-10 | 19 | 22 | 40 |
| Kelley | 5.3 × 10-9 | 4.4 × 10-9 | 1.9 × 10-9 | 8.8 | 11 | 24 | |
| Agarwal | 1.3 × 10-9 | 1.0 × 10-9 | 5.0 × 10-9 | 3.5 | 4.4 | 9.1 | |
| 2005 | Crifo | 1.4 × 10-9 | 3.7 × 10-10 | 7.1 × 10-10 | 11 | 13 | 25 |
| Kelley | 3.2 × 10-9 | 2.4 × 10-9 | 4.6 × 10-10 | 4.7 | 6.4 | 16 | |
| Agarwal | 6.8 × 10-9 | 5.0 × 10-9 | 9.7 × 10-9 | 2.2 | 3.0 | 7.6 | |
| 2006 | Crifo | 6.5 × 10-10 | 5.7 × 10-10 | 3.4 × 10-10 | 17 | 19 | 33 |
| Kelley | 2.0 × 10-9 | 1.7 × 10-9 | 7.9 × 10-10 | 5.4 | 6.6 | 14 | |
| Agarwal | 2.6 × 10-9 | 2.1 × 10-9 | 1.0 × 10-9 | 4.2 | 5.2 | 11 | |
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