Three different parameter sets were used at two different altitudes. Spatial mode (mode B) data was collected from both 1000 m and 2000 m altitudes. Combined spectral and spatial mode data was collected from 2000 m altitude. Examples of spatial mode data is shown from 1000 m altitude and 2000 m altitude . An example from the spectral data from 2000 m altitude is also shown.
The data collection parameters were chosen for this flight so that a wide variety of spectral data can be obtained for further studies. The two altitudes were chosen to give data with two clearly different spatial resolutions.
A small two-engine aeroplane was used in the experiments. The ground speed during the flight was about 100 knots (185 km/h). The navigation on the flight lines was based on differential GPS. The same data was also recorded by the AISA instrument together with the image data.