## 6 Conclusions  
An up-to-date investigation of the residual deformations of ocean-reclaimed platforms over the coastal area of the Shanghai megacity, as recovered by appropriately combining DInSAR-driven time-series of deformation, obtained from the different (C- and X-) frequency bands, is provided in this work. In particular, we processed ASAR/ENVISAT (C-band) and CSK (X-band) radar images, acquired from 2007 to 2016. The achieved DInSAR deformation time-series were then jointly integrated by making use of the time-dependent geotechnical model, derived from laboratory centrifuge tests, regarding the deformations occurring in the area under investigation. In particular, in this work, we used such models to further extend some previous analyses [19]. As a result, we show that there is a good agreement between the combined-C/X-band DInSAR (vertical) time-series, and what is theoretically expected from the model. The newly-processed CSK time-series show that the deformation rate in ocean-reclaimed platforms has generally been reducing over time, in both the western and eastern sectors. In particular, the areas that were firstly reclaimed in the WS are today (almost ten years after the end of reclamation procedures) rather stable (i.e., the deformation rate is approaching zero). On the other hand, the ES zone, where the reclamation processes started later, is still affected by significant deformation signals, with deformation rates on the order of 15 mm/year. The method we used to link time-gapped displacement time-series relies on the knowledge of a model for the expected deformation, and the hypothesis that deformation over reclaimed platforms is mostly vertical. The latter assumption is reasonable, as the soil consolidation stages, as well as the mechanisms induced by the weight of the buildings, which have been built in the new city, are, at most, responsible for vertical movements of the terrain. Nevertheless, the lack of sufficiently large archives of time-overlapped ascending/descending SAR images over Lingang New City (with respect to the reclaimed areas) makes the measurement of the east-west deformation rates directly from SAR data unreliable, as shown, for instance, by using the methods in [55; 70; 71; 72; 73; 74; 75]. Moreover, such a strategy can be extended to other cases where deformation components in east-west directions cannot be considered negligible. This can be done by effectively combining the strategies adopted here, and the combination methods discussed in [55; 70; 71; 72; 73; 74; 75], which exploit SAR data acquired by multiple sensors and different orbital positions (e.g., from ascending and descending passages). In addition, the adopted combination scheme can be further generalized to the point where more than two time-gapped sequences of SAR images are available. To extend, and fully validate, our prediction models, we count on gaining access, in the near future, to data gathered by a network of GPS that are currently being deployed in Lingang New City, and to make use of the archives of newly-acquired SAR data collected by the European Sentinel-1A/-1B C-band SAR sensors of the Copernicus program [76]. In fact, at the time of this investigation, Sentinel-1 archives relevant to the area under investigation were not sufficiently populated (less than 20 scenes) to allow the generation of reliable and steady displacement time-series. Their use is a matter for further studies. The following are available online at www.mdpi.com/2072-4292/8/11/911/s1. Table S1: ASAR/ENVISAT SAR Acquisition list. Table S2: CSK SAR Acquisition list. **Acknowledgments: This work has been carried out within the Dragon III ESA project ID 10644, entitled \"DInSAR Detection of Surface Deformation in the Coastal Reclaimed Areas of Shanghai City\". Cosmo-SkyMed SAR data were provided to us by the Italian Space Agency in the framework of the mentioned Dragon III project, whereas ASAR/ENVISAT data were provided to us by the European Space Agency in the framework of the CAT-1 ESA nr. 11461 project.