Author(s)

Qiang Liu and Tianyong Chu

Corresponding Author

Qiang Liu

ABSTRACT

WITH the continuous maturity of InSAR(Interferometric Synthetic Aperture Radar) technology, Sentinel-1A data as a free C-band data source has been more and more popular, but there are still some problems in the application of sentinel data in surface deformation monitoring. In this paper, through the interference processing of sentinel data which are from the same time interval and different season（summer and winter）in northern China, we found that there is a serious problem of volume scattering decorrelation in the summer data, which caused a large error in the results. However, the effect of long-term interval is less than the volume scattering decorrelation, it can provide guidance for the use of time series InSAR technology such as SBAS-InSAR and so on.

KEYWORDS

Sentinel-1A data, volume scattering decorrelation, InSAR