We present an advanced differential synthetic aperture radar (SAR) interferometry (DInSAR) processing chain, based on the Parallel Small BAseline Subset (P-SBAS) technique, for the efficient generation of deformation time series from Sentinel-1 (S-1) interferometric wide (IW) swath SAR data sets. We first discuss an effective solution for the generation of high-quality interferograms, which properly accounts for the peculiarities of the terrain observation with progressive scans (TOPS) acquisition mode used to collect S-1 IW SAR data. These data characteristics are also properly accounted within the developed processing chain, taking full advantage from the burst partitioning. Indeed, such data structure represents a key element in the proposed P-SBAS implementation of the S-1 IW processing chain, whose migration into a cloud computing (CC) environment is also envisaged. An extensive experimental analysis, which allows us to assess the quality of the obtained interferometric products, is presented. To do this, we apply the developed S-1 IW P-SBAS processing chain to the overall archive acquired from descending orbits during the March 2015-April 2017 time span over the whole Italian territory, consisting in 2740 S-1 slices. In particular, the quality of the final results is assessed through a large-scale comparison with the GPS measurements relevant to nearly 500 stations. The mean standard deviation value of the differences between the DInSAR and the GPS time series (projected in the radar line of sight) is less than 0.5 cm, thus

No abstract

Abstract-In this paper, an algorithm for breathing rate extraction from PPG signal is proposed. Two critical aspects have been endorsed during the implementation: i) good performances and ii) low computational complexity. The proposed solution is based on the Empirical Mode Decomposition (EMD) approach and it proves to be robust and accurate even in presence of noisy epochs. It has been validated on two distinct datasets: a)experimental data we have collected using wearables for physiological monitoring and b) recording sessions from PhysioBank MIMIC II Waveform Database. The presented results showed a mean absolute error of 0.0044 Hz, corresponding to 0.26 breaths per minute.

Abstract-Simple algorithms for retrieving free-space antenna field or directivity patterns from complex (field) or real (intensity) measurements taken in ideal reverberation environments are introduced and discussed.

No abstract