Capella's Stripmap collect mode is available in three standard lengths: 20 km, 50km, and 100km. For all three lengths the default width is 5km, but some use cases are better served with larger image sizes. Users can adjust the width of a Stripmap - 20, Stripmap - 50, or Stripmap - 100 collection type to have a width between 5 and 10km.
Steps to change the Stripmap image width
- In the Capella Console, create a new task for your point target or AOI.
- Set Collection Type to Stripmap - 20, Stripmap - 50, or Stripmap - 100.
- Open the Optional Parameter by clicking on the arrow.
- Adjust the Image Width slider to value between 5 and 10 km.
- Click Create Task.
Impact of adjusting the image width
Larger image width provides the ability to cover areas more easily with fewer collects. To generate a wider image, Capella is using our standard Stripmap collection mode and only modifying the way the data is processed. As a result of that, beyond the standard width of 5 km, customers can expect a slight increase in noise towards the edge of the image. In the example above, a gradient in the brightness of the image is noticeable across the range direction.
Ship Detection - Larger image sizes are perfect for detecting ships. Very bright targets will still be detectable at the border of wider Stripmap images given that the intensity of their signal is well-above the slightly higher noise level.
Landcover Classification - Target detection and landcover are also great use cases for larger image sizes. The increase in noise may, however, limit the efficacy of some automatic processing techniques at the edge of image depending on the brightness of the target.