This dataset contains Interferometric Synthetic Aperture Radar (InSAR) products generated by Looking inside the Continents from Space Synthetic Aperture Radar (LiCSAR) from Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET). Interferograms and coherence maps have been produced automatically using the LiCSAR processor, which builds on the Gamma SAR and Interferometry software. Interferograms have been processed in overlapping “frames” defined within COMET-LiCS.

The basic products are given in the list below:

• geo.cc.tif: This is the coherence image of the interferometric pair. The values vary between 0-255 in which 0 refers to the lowest coherence values and 255 indicates the highest values of coherence.

• geo.diff_pha.tif: The wrapped phase image in radian. The values vary within the range of -3.14 to 3.14. These are differential phases as the topographic correction has already been applied using 1 arc-second SRTM DEM data.

• geo.unw.tif: This is the unwrapped phase image in radian. The unwrapping is performed using SNAPHU. The zero values in the unwrapped file refer to the pixels which are masked out due to the low coherence.

All products are georeferenced to WGS-84 geographic coordinate system.

LiCSAR products are categorised into 175 folders which correspond to the Sentinel-1 175 orbits per cycle which are the same for both Sentinel-1A and Sentinel-1B. In the next level, the frames are defined. The frames are slices that refer to the same point temporally and geographically. The name of each frame (OOOP_AAAAA_BBBBBB) consists of 3 parts: in the first part, the three digits OOO denotes the orbit number while P shows whether it is descending (D) or ascending (A). The next part i.e. AAAAA shows the geographic location of the frame. Finally, the last part BBBBBB identifies the number of bursts where the first, second and third digit pairs identify the number of bursts in the first, second and third sub-swath respectively.

The LiCSAR processing is currently generating 3 connections per epoch. This means that for each epoch there are 3 interferometric pairs generated using the next 3 chronological acquisitions.

Please also include the following acknowledgement and citations when using LiCSAR data:

Acknowledgement: “LiCSAR contains modified Copernicus Sentinel data [Year of data used] analysed by the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET). LiCSAR uses JASMIN, the UK’s collaborative data analysis environment (http://jasmin.ac.uk)”