Ground-penetrating radar data of shallow firn in the southwestern Greenland percolation zone, May 2019

This dataset contains ground-penetrating radar (GPR) data collected in the percolation zone of southwest Greenland in May 2019. Approximately 114 km (kilometers) of GPR transects were surveyed within 66.5–67.0°N (degrees North) , 45.7–47.2°W (degrees West), across elevations of ~1,830 to 2,140 m (meters) above mean sea level. Data were acquired using a Geophysical Survey Systems, Inc. (GSSI) SIR 3000 controller, equipped with an antenna of 400 MHz (megahertz) center frequency and 800 MHz bandwidth. GPS (Global Positioning System) data were collected concurrently with the GPR surveys. The dataset includes both raw and post-processed GPR and GPS data and supports investigations of subsurface firn structure, ice slab studies, and meltwater refreezing processes in the Greenland ice sheet percolation zone. The dataset includes the following components: GPR - GPRdata_lv0: Raw GPR data, organized into eight subfolders by survey day. Each profile consists of a radar data file (e.g., FILE____001.dzt), its associated metadata file (e.g., FILE____001.txt), and a .mat file (e.g., FILE____001.mat) generated from the original .dzt file. File numbers range from 001 to 079; some numbers are missing where profiles were excluded due to poor data quality. - GPRdata_lv1: Processed GPR data. Files follow the naming convention gpr_fileXXX.mat (e.g., gpr_file001.mat). GPS - GPSdata_lv0: Raw GPS data. Files follow Trimble’s default naming convention (e.g., 20791281.t01). The numeric identifiers are automatically generated by the instrument and do not convey survey order or geographic location. - GPSdata_lv1: Processing GPS data, contains two processed GPS products. -- gps_processed_final.mat: Final processed GPS data for GPR files 001–079. Note that the elevation gaps in files 037–046 and 069–079 are not corrected in this file. -- gps_elevation_dem_corrected.mat: Corrected elevations for GPR files 037–046 and 069–079 using ArcticDEM-derived adjustments. Script: Processing script. MATLAB script used for GPR data post-processing (gpr_process.m). Explanation_of_Variables.csv: A complete description of all variables contained in the dataset. GPR_Spatial_Overview.pdf: A spatial overview of the GPR transects, including one map of the overall survey coverage and eight daily survey layouts.