| SDSS 5-Year Baseline Survey | |||||||||||
| Baseline Performance Metrics for Spectroscopy - Northern Survey Region | |||||||||||
| Revised 06-Feb-2001 | |||||||||||
| Period | Available dark hrs. | Spectro fraction | Weather | System uptime | Spectro efficiency | Spectro ops. | End game | Available spectro hours | Num of spectro plates | ||
| 2000 | Q1 | - | - | - | - | - | - | - | 0 | 0 | |
| Q2 | 277 | 0 | 0.6 | 0.7 | 0.65 | 0 | 1 | 0 | 0 | ||
| Q3 | 40 | 0 | 0.5 | 0.8 | 0.65 | 0 | 1 | 0 | 0 | ||
| Q4 | 196 | 0 | 0.6 | 0.9 | 0.65 | 0 | 1 | 0 | 0 | ||
| 2001 | Q1 | 464 | 0.7 | 0.6 | 0.9 | 0.65 | 0.75 | 1 | 85.5 | 114 | |
| Q2 | 277 | 0.7 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 61.3 | 82 | ||
| Q3 | 40 | 0.7 | 0.5 | 0.9 | 0.65 | 0.9 | 1 | 7.4 | 10 | ||
| Q4 | 196 | 0.7 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 43.3 | 58 | ||
| 2002 | Q1 | 464 | 0.7 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 102.6 | 137 | |
| Q2 | 277 | 0.7 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 61.3 | 82 | ||
| Q3 | 40 | 0.7 | 0.5 | 0.9 | 0.65 | 0.9 | 1 | 7.4 | 10 | ||
| Q4 | 196 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 49.5 | 66 | ||
| 2003 | Q1 | 464 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 117.3 | 156 | |
| Q2 | 277 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 70.0 | 93 | ||
| Q3 | 40 | 0.8 | 0.5 | 0.9 | 0.65 | 0.9 | 1 | 8.4 | 11 | ||
| Q4 | 196 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 49.5 | 66 | ||
| 2004 | Q1 | 464 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 117.3 | 156 | |
| Q2 | 277 | 0.8 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 70.0 | 93 | ||
| Q3 | 40 | 0.8 | 0.5 | 0.9 | 0.65 | 0.9 | 1 | 8.4 | 11 | ||
| Q4 | 196 | 1 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 61.9 | 83 | ||
| 2005 | Q1 | 464 | 1 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 146.6 | 195 | |
| Q2 | 277 | 1 | 0.6 | 0.9 | 0.65 | 0.9 | 1 | 87.5 | 117 | ||
| TOTAL | 5162 | 1155.1 | 1540 | ||||||||