1 research outputs found
Fusion of ascending and descending pass raw TanDEM-X DEM
This paper deals with the fusion of TanDEM-X raw DEMs
in ascending and descending pass over Mumbai test area
and enhance its quality. Before applying fusion method, a
robust layover and shadow map has been calculated in ITP
using TanDEM-X DEM and the corresponding slant range
image. The selection of optimum weights for fusion has
been based on height error map calculated from
interferometric coherence. Results show a substantial
reduction in number of invalid pixels after fusion. In the
fused DEM, invalid is only 1.2%, while ascending and
descending pass DEMs have 6.7% and 5.7% respectively.
The improvement in accuracy of the DEM is very slight in
this case which is due to the coarse resolution of the SRTM
DEM used as reference