W
ater resource facilities such as multi purpose dams, flood control dams in Korea were built
intensively from 1970 to 1980. For monitorin g these dams safety, fesibility study on time series
stabil ity analysis of water resource structures such as dams and embankments using satellite
SAR(Synthetic Aperture Radar) I nterferometry technique are being attempted. The PS InSAR
(Permanant Scatterer Interferometry SAR) technique uses the PS ( permanant scatte rer) for water
resource facilities with relatively high coherence in the InSAR image. InSAR method can be
improved to mm sensitivity of d isplacement analysis. In addition, since time seires InSAR pairs
are generated, there is an advantage in that DEM error s, satellite orbit errors, and delay errors due
to atmospheric components can be more precisely removed (Ferretti et al., 2001). In this case
study, PS InSAR method was applied using Sentinel 1 SLC (Single Look Complex) satellite data
obtained from Septemb er 201 4 to September 2020 for dam safety monitoring of water resource
facilities. Time series displacement analysis was performed on the LOS (Line Of Sight) direction
of domestic water resource facilities such as Soyanggang Dam, Yeongju Dam, and Yeongam
Ge umho Embankment. In the future, using both SAR satellite data including Water resource
satellite(CAS500 5; Compact Advanced Satellite 500 5) of ascending and descending orbits, we
plan to perform comparison with GPS observation data and accuracy verificati on through vertical
and horizontal displacement analysis.