Doble reflection data at the North East Greenland Ice Stream

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### Radargrams used in analysis ###
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Radargrams for the four polarization configurations,
Int0 = HH, Int1 = HV, Int2 = VV, Int3 = VH

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20220628_UWB_Greenland_2022_combcombined_Int0_interp_dx5_cleaned_traced_splits.mat
20220628_UWB_Greenland_2022_combcombined_Int1_interp_dx5_cleaned_traced_splits.mat
20220628_UWB_Greenland_2022_combcombined_Int2_interp_dx5_cleaned_traced_splits.mat
20220628_UWB_Greenland_2022_combcombined_Int3_interp_dx5_cleaned_traced_splits.mat
20220630_UWB_Greenland_2022_combcombined_Int0_interp_dx5_cleaned_traced_splits.mat
20220630_UWB_Greenland_2022_combcombined_Int1_interp_dx5_cleaned_traced_splits.mat
20220630_UWB_Greenland_2022_combcombined_Int2_interp_dx5_cleaned_traced_splits.mat
20220630_UWB_Greenland_2022_combcombined_Int3_interp_dx5_cleaned_traced_splits.mat
20220701_UWB_Greenland_2022_combcombined_Int0_interp_dx5_cleaned_traced_splits.mat
20220701_UWB_Greenland_2022_combcombined_Int1_interp_dx5_cleaned_traced_splits.mat
20220701_UWB_Greenland_2022_combcombined_Int2_interp_dx5_cleaned_traced_splits.mat
20220701_UWB_Greenland_2022_combcombined_Int3_interp_dx5_cleaned_traced_splits.mat
20220706_UWB_Greenland_2022_combcombined_Int0_interp_dx5_cleaned_traced_splits.mat
20220706_UWB_Greenland_2022_combcombined_Int1_interp_dx5_cleaned_traced_splits.mat
20220706_UWB_Greenland_2022_combcombined_Int2_interp_dx5_cleaned_traced_splits.mat
20220706_UWB_Greenland_2022_combcombined_Int3_interp_dx5_cleaned_traced_splits.mat
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Relevant parameters:
data: Amplitude data in dB
long,lat: Longitutude,latitude
travel_time: Two-way travel time in micro seconds
tnum: Trace number

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Radargrams can be plotted using the ImpDAR executable impplot.
The command below will plot a radargram with the picked double reflections
impplot rg 20220701_UWB_Greenland_2022_combcombined_Int0_interp_dx5_cleaned_traced_splits.mat -picks

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### Picked double reflections ###
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Text files containing the picked relfections
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20220628_UWB_Greenland_2022_Int0_traced_splits.csv
20220628_UWB_Greenland_2022_Int1_traced_splits.csv
20220628_UWB_Greenland_2022_Int2_traced_splits.csv
20220628_UWB_Greenland_2022_Int3_traced_splits.csv
20220630_UWB_Greenland_2022_Int0_traced_splits.csv
20220630_UWB_Greenland_2022_Int1_traced_splits.csv
20220630_UWB_Greenland_2022_Int2_traced_splits.csv
20220630_UWB_Greenland_2022_Int3_traced_splits.csv
20220701_UWB_Greenland_2022_Int0_traced_splits.csv
20220701_UWB_Greenland_2022_Int1_traced_splits.csv
20220701_UWB_Greenland_2022_Int2_traced_splits.csv
20220701_UWB_Greenland_2022_Int3_traced_splits.csv
20220706_UWB_Greenland_2022_Int0_traced_splits.csv
20220706_UWB_Greenland_2022_Int1_traced_splits.csv
20220706_UWB_Greenland_2022_Int2_traced_splits.csv
20220706_UWB_Greenland_2022_Int3_traced_splits.csv
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Parameters:
lat,lon: Latitude,longitude
tnum: Trace number
Layer_i_twtt Two-way travel time of the ith picked layer, the double reflections come in pairs (for example: Layer_0_twtt and Layer_1_twtt is one double reflection pair)

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### Full results ###
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Text files containing the full results per traced double reflection
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20220628_HH_results.csv 20220630_HH_results.csv 20220701_HH_results.csv 20220706_HH_results.csv
20220628_VV_results.csv 20220630_VV_results.csv 20220701_VV_results.csv 20220706_VV_results.csv
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Parameters:
lat,lon: Latitude,longitude
tnum: Trace number
Layer_i_twtt Two-way travel time of the ith picked layer
Layer_i_power Amplitude power of the ith picked layer
dPower_i-j Difference in amplitude power, dPower_i-j = Layer_i_power-Layer_j_power, (i,j) = {(1,0),(3,2),(5,4),...)
Noise_i_j Mean amplitude power between the ith and jth layer, used as a noise/background level
lon_P,lat_P Latitude and longitude of the precision GPS located on the port side of the antenna panels
lon_P,lat_P Latitude and longitude of the precision GPS located on the starboard side of the antenna panels
dP_vs_angle_corr_i-j Pearson correlation coefficient between the along-track gradient of dPower_i-j and the along-track gradient of |phi|. Used to get the sign of phi
dPower_corrected_i-j A corrected version of dPower_i-j, where the dPower from the HV and VH data is used to eliminate the dependency of L_x,L_y
phi_i-j Estimated orientation, phi, from the ith and jth layer
psi_abs_i-j The orientation converted to a cartesian reference frame, used for plotting
psi_flow_i-j The orientation relative to the local flow vector
dTWTT_i-j The difference in two-way travel time of layer i and j
dEig_i-j The horizontal eigenvalue differences calculated from dTWTT_i-j

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### Mean results ###
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Text files containing the results averaged between all double reflections and HH and VV.
What is shown on the main results figure in the manuscript
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20220628_mean_results.csv
20220630_mean_results.csv
20220701_mean_results.csv
20220706_mean_results.csv
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Parameters:
lat,lon Latitude,longitude
tnum Trace number
psi_flow_mean The orientation relative to the local flow vector averaged over all picks and polarizations
dEig_mean The horizontal eigenvalue difference averaged over all picks and polarizations