Table 1.
Characteristics of the five flights completed over the Gréoux experiment in 2016.
| Date (DaS) | Illumination conditions | Wind speed (km/h) | Focal length (mm) | Altitude (m) | GSD (cm) | Overlap (%) | σx (cm) | σy (cm) | σz (cm) | |
|---|---|---|---|---|---|---|---|---|---|---|
| along | across | |||||||||
| 139 | Covered | 8 | 30 | 75 | 0.98 | 90 | 70 | 2.4 | 3.1 | 5.5 |
| 152 | Sunny | 6 | 30 | 75 | 0.98 | 90 | 70 | 4.5 | 1.3 | 3.3 |
| 194 | Sunny | 10 | 19 | 50 | 1.04 | 94 | 70 | 5.1 | 1.3 | 3.9 |
| 216 | Cloudy | 7 | 19 | 50 | 1.04 | 94 | 70 | 2.1 | 2.9 | 2.8 |
| 225 | Sunny | 5 | 30 | 75 | 0.98 | 90 | 70 | 5.0 | 2.6 | 3.9 |
σx, σy, σz, correspond to the standard deviation of the localization of the control points used to quantify the geometric accuracy.