Release 0.6.0

[mcgarth]

This is a long overdue release to master branch.

Added

• Geometry and baseline calculations, making use of GAMMA software MLI metadata and baseline files.
• DEM error estimation and correction functionality (untested prototype).
• Unwrapping error detection and masking functionality, making use of phase closure loops.
• Tests to check that the independent and network orbital methods are both able to recover the input parameters in synthetic examples.
• Tests for temporal and spatial gaussian filter options. Compare PyRate code against scipy.ndimage equivalents.
• More output visualisation scripts in the utils/ directory, including an interferogram plotting script.
• New “Crop A” unit test dataset derived from Sentinel-1 data over Mexico City.
• Scaling factor parameter velerror_nsig for uncertainty/error output products.
• Calculate and output coherence statistics files during prepifg.
• Add line-of-sight projection functionality for output products.
• Add signal polarity switching functionality for output products.
• Error handling for more than two MLI.par files in the header list matching an interferograms date-pair.

Fixed

• Fix bugs in the application of NaN masking and radian-to-millimetre conversion of interferogram data in correct step.
• Fix bugs in the implementation of the orbital error network and independent methods.
• Fix bugs in the implementation of spatial and temporal filters in the aps module.
• Fix bug in the application of reference phase subtraction that resulted in NaNs in the reference window.
• Fix file handling behaviour in prepifg so that a large number of files are not left open.

Changed

• Enabled multi-looking and parallel processing for the independent orbital method.
• Simplify output filenames produced by PyRate.
• Move output files to dedicated named sub-directories.
• Use of the offset parameter in orbital module; now renamed to intercept.
• Input rasters to conv2tif can now have un-equal X and Y pixel resolutions.
• Change units of temporal filter from years to days.
• Moved Continuous Integration from Travis service to GitHub Actions.
• Made MPI an optional system dependency for PyRate (previously required).

Removed

• Remove unused cython, glob2 and pillow dependencies.
• Remove support for Python 3.6.
• Remove support for filter types other than Gaussian in the APS module, and associated config options slpfmethod, slpforder, tlpfmethod.
• config module deprecated; functionality moved to configuration, shared and constants modules.
• Deprecated obs_dir, slc_dir and coh_file_dir configuration parameters.

[adu461386118]

I have re-run the five adjacent frames using pyrate 0.6.0 (T118DF30S, T118DF32S, T45DF32S, T147DF32S and T147DF34S): the results look ok to me in general.

[mcgarth]

Thanks everyone for your efforts reviewing this release. I will publish it very soon!