DOI: 10.5281/zenodo.7064828
title: InSAR-derived horizontal velocities in a global reference frame - final output dataset and software codes

description: The output dataset as described in the article in title, extracted from COMET LiCSAR dataset in March 2021. We also provide a snapshot of the python3 codes used to generate the output dataset. Contents and description of the dataset: uaz_values.csv<br> ==============<br> Contains u_az values and other relevant data in columns:<br> frame - ID of related frame (same as in frame_values.csv)<br> esd_master - reference acquisition epoch<br> epoch - date of acquisition epoch<br> daz_total_wrt_orbits - original extracted azimuth shift w.r.t. orbits<br> daz_cc_wrt_orbits - original extracted azimuth shift w.r.t. orbits from intensity cross-correlation (prior to spectral diversity)<br> drg_wrt_orbits - original extracted range shift w.r.t. orbits<br> orbits_precision - precision of applied orbits (P..precise, R..restituted)<br> version - orbits version<br> daz_iono_grad_mm - u_az from ionosphere propagation<br> tecs_A - estimated TECs at centre of hyphotetical burst A<br> tecs_A - estimated TECs at centre of hyphotetical burst B<br> daz_mm_notide - u_az after correction of solid-earth tides<br> daz_mm_notide_noiono_grad - u_az after correction of solid-earth tides and ionospheric gradient propagation<br> is_outlier_* - flag of outlier datapoint, as identified through Huber loss function (related to velocity estimates in frame_values.csv) frame_values.csv<br> ================<br> Contains along-track velocity estimates and other relevant data in columns:<br> frame - ID of related frame<br> master - reference acquisition epoch<br> center_lon - longitude coordinate of the frame centre<br> center_lat - latitude coordinate of the frame centre<br> heading - satellite heading angle (from the geograpic north)<br> azimuth_resolution - extracted azimuth pixel spacing (in metres)<br> range_resolution - extracted range pixel spacing (in metres)<br> avg_incidence_angle - average incidence angle of the frame<br> centre_range_m - approximate slant distance between the satellite and centre of the frame<br> centre_time - acquisition time (UTC) of centre of the frame at the reference epoch (appliable to other epochs)<br> s1AorB - flag of S-1A or B of the reference epoch<br> slope_plates_vel_azi_itrf2014 - along-track velocity estimated from ITRF2014 plate motion model<br> slope_daz_mm_mmyear - estimated along-track velocity from the original u_az values (in mm/year)<br> slope_daz_mm_notide_mmyear - estimated along-track velocity from u_az values after correction on solid-earth tides<br> slope_daz_mm_notide_noiono_grad_mmyear - estimated along-track velocity from u_az values after correction on solid-earth tides and ionosphere<br> intercept_* - corresponding intercept (in mm)<br> *_RMSE_selection - RMSE of outlier-free u_az data samples<br> *_count_selection - count of outlier-free u_az data samples used to estimate corresponding velocity<br> *_RMSE_mmy_full - RMSE from all u_az data samples applying corresponding velocity and intercept (in mm/year) <br> decomposed_grid.csv<br> ===================<br> Contains decomposed velocities (in 250x250 km spacing grid) and other relevant data in columns:<br> count - count of frames used for the decomposition<br> opass - orbital pass codes of the input frames (D..descending, A..ascending)<br> centroid_lon - longitude coordinate of the grid cell centre<br> centroid_lat - latitude coordinate of the grid cell centre<br> VEL_N_noTI - northward velocity component from data corrected for solid-earth tides and ionosphere<br> VEL_E_noTI - eastward velocity component from data corrected for solid-earth tides and ionosphere<br> VEL_N_noT - northward velocity component from data corrected for solid-earth tides<br> VEL_E_noT - eastward velocity component from data corrected for solid-earth tides<br> ITRF_N - northward velocity component from averaged ITRF2014 plate motion model<br> ITRF_E - eastward velocity component from averaged ITRF2014 plate motion model<br> *RMSE_* - RMSE of corresponding data