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Key parameters for the airborne laser scanning campaigns
| Parameter | 1999 | 2010 |
|---|---|---|
| Instrument | Optech ALTM 1210 | Optech ALTM Gemini |
| Pulse repetition frequency | 10 kHz | 100 kHz |
| Scan frequency | 21 Hz | 55 Hz |
| Scan half-angle (after processing) | 14.0° | 13.8° |
| Pulse density on ground | 1.2 m-2 | 7.3 m-2 |
