Table 1.
Specifications for the radar and rangefinder equipment, and protocols used for tracking of migrating raptors.
| type | surveillance radar | tracking radar | laser rangefinder |
|---|---|---|---|
| stations | study site 2010–2011, Rødbyhavn reference site 2010 | Rødbyhavn reference site 2009 | study site 2010–2011, Gedser reference site 2011 |
| brand | FR2127 | Superfledermaus | Vectronix Vector 21 Aero® |
| type | X band | X band | powered laser with 8× zoom |
| tracking range | 6 km | 6 km | 3 km |
| power output | 25 kW | 150 kW | — |
| pulse repetition frequency | 500 Hz | 2082 Hz | — |
| number of tracking days | study site 37, Rødbyhavn ref. site 19 | Rødbyhavn ref. site 37 | study site 37, Gedser ref. site 12 |
| time of tracking | study site Aug–Oct, Rødbyhavn ref. site July–Nov | Rødbyhavn ref. site July–Nov | study site Aug–Oct, Gedser ref. site Aug–Oct |
| tracking method | groups of raptors | groups of raptors | groups of raptors |