In area without available public LiDAR/Elevation models, and if an individual data gathering is out of the airports price range, Ascend offers an alternative using the NextMap 5 elevation model, or WorldDEM elevation model generated from TerraSAR-X/Tandem-X data.
The Ascend obstacle management system uses Satellite elevation data to determine the terrain elevation. The main use of Satellite elevation data in the obstacle management system, is as a terrain elevation model. This can be used to handle height request to the airport. And with the terrain elevation model in the system the Ascend Obstacle field app, enables the airport personnel to easy gathering of obstacle height with simple field equipment.
Obstacle analysis based on satellite generated elevation data, is not a complete obstacle analysis, as the resolution and the acquisition date of the data is not sufficient to find all obstacles from the data alone. It is recommended to use this type of obstacle analysis as a starting point for a field measurement of the obstacles in the airport area.