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+## GACOS CORRECTION FOR GMTSAR
+These software is intended to correct unwrapped phases using GACOS grids for GMTSAR.
+
+They have been tested with: GMT v6.1.0 GMTSAR v6.0
+
+On "Test_against_matlab" folder, I perform comparisons with matlab with consistent results.
+To reproduce the output just use: source command.txt in each folder.
+There is a small README file in each folder
+
+### SINGLE INTERFEROGRAM
+single_GACOS_correction.csh is intented to correct a single interferogram at a time with certain parameters
+
+### STACK OF INTERFEROGRAMS
+GACOS_correction.csh and operation.csh are used to correct a stack of interferograms in a time series process
+
+Corrections are applied to the unwrap.grd files
+
+Feel free to use and edit the code if needed
+
+References:
+
+*Yu, C., Li, Z., Penna, N. T., & Crippa, P. (2018). Generic atmospheric correction model for Interferometric Synthetic Aperture Radar observations. Journal of Geophysical Research: Solid Earth, 123(10), 9202-9222.*
+
+*Yu, C., Li, Z., & Penna, N. T. (2018). Interferometric synthetic aperture radar atmospheric correction using a GPS-based iterative tropospheric decomposition model. Remote Sensing of Environment, 204, 109-121.*
+
+*Yu, C., Penna, N. T., & Li, Z. (2017). Generation of real‐time mode high‐resolution water vapor fields from GPS observations. Journal of Geophysical Research: Atmospheres, 122(3), 2008-2025.*