| Dawn | Sunrise | −6˚ | −12˚ | −18˚ |
| Date | m | m | m | m |
| 8-5-2007 | 9.90 | 13.90 | 20.20 | 21.40 |
| 10-11-2007 | 9.33 | 12.40 | 19.50 | 21.43 |
| 29-12-2007 | 9.90 | 13.90 | 20.30 | 22.10 |
| 11-1-2008 | 9.33 | 13.97 | 20.44 | 22.10 |
| 9-2-2008 | 9.90 | 13.90 | 20.30 | 21.75 |
| 22-3-2008 | 9.90 | 16.70 | 21.11 | 21.63 |
| 23-3-2008 | 10.94 | 16.06 | 21.11 | 21.63 |
| 7-4-2008 | 10.94 | 17.60 | 21.36 | 20.50 |
| Mean | 10.02 | 14.80 | 20.54 | 21.567 |
| SD | 0.621 | 1.7694 | 0.614 | 0.506 |