Parameter-Documentation

Generic Description:	Backscatter Coefficient
Parameter:	sigma0	Recordmap:	instr
Unit:	db	Size:	+2	Scaling:	-2

Version 00

CryoSat-2 (Extended Mission) GOP 1Hz	Backscatter Coefficient
CryoSat-2 GOP 1Hz	Backscatter Coefficient
ERS-1 (Phase A) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase A) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase B) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase B) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase C) SGDR/REAPER 1Hz	Backscatter Coefficient
ERS-1 (Phase C) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase D) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase D) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase E) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase E) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase F) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase F) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-1 (Phase G) SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-1 (Phase G) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
ERS-2 SGDR/REAPER 1Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0
ERS-2 SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ocean_sig0_20hz
Envisat (Extended Mission) SGDR v2.1 1Hz	Backscatter Coefficient
Envisat (Extended Mission) SGDR v3.0 1Hz	Backscatter Coefficient Source: SGDR v3.0 Original-Parameter: sig0_ocean_01_ku
Envisat SGDR v2.1 1Hz	Backscatter Coefficient Ku-band corrected ocean backscatter coefficient Source: SGDR v2.1 Original-Parameter: ku_ocean_bscat_coeff (Field number 72)
Envisat SGDR v2.1 20Hz	Backscatter Coefficient Ku-band corrected ocean backscatter coefficient Source: SGDR v2.1 Original-Parameter: ku_ocean_bscat_coeff (Field number 72)
Envisat SGDR v3.0 1Hz	Backscatter Coefficient Source: SGDR v3.0 Original-Parameter: sig0_ocean_01_ku
Geosat Follow-On GDR 1Hz	Backscatter Coefficient
Jason-1 (Extended Mission) SGDR-E 1Hz	Backscatter Coefficient
Jason-1 (Geodetic Mission) SGDR-E 1Hz	Backscatter Coefficient
Jason-1 SGDR-E 1Hz	Backscatter Coefficient
Jason-2 (Extended Mission) SGDR-D 1Hz	Backscatter Coefficient
Jason-2 (Extended Mission) SGDR-D 20Hz	Backscatter Coefficient
Jason-2 (Geodetic Mission, Phase 1) SGDR-D 1Hz	Backscatter Coefficient
Jason-2 (Geodetic Mission, Phase 2) SGDR-D 1Hz	Backscatter Coefficient
Jason-2 SGDR-D 1Hz	Backscatter Coefficient Ku band corrected backscatter coefficient Source: SGDR-D Original-Parameter: sig0_ku
Jason-2 SGDR-D 20Hz	Backscatter Coefficient 20 Hz Ku band corrected backscatter coefficient Source: SGDR-D Original-Parameter: sig0_20hz_ku
Jason-3 (Extended Mission) SGDR-F 1Hz	Backscatter Coefficient Named sig0_ku in GDR-D standard. All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (sig0_cor_calibration), modeled instrumental errors correction (sig0_cor_ocean_model_instr) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_01/ku/sig0_ocean
Jason-3 (Extended Mission) SGDR-F 20Hz	Backscatter Coefficient Named sig0_20hz_ku in GDR-D standard. All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (/data_01/ku/sig0_cor_calibration), modeled instrumental errors correction (/data_01/ku/sig0_cor_ocean_model_instr) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_20/ku/sig0_ocean
Jason-3 SGDR-D 1Hz	Backscatter Coefficient Ku band corrected backscatter coefficient Source: SGDR-D Original-Parameter: sig0_ku
Jason-3 SGDR-D 20Hz	Backscatter Coefficient 20 Hz Ku band corrected backscatter coefficient Source: SGDR-D Original-Parameter: sig0_20hz_ku
Jason-3 SGDR-F 1Hz	Backscatter Coefficient Source: SGDR-F Original-Parameter: data_01/ku/sig0_ocean
Jason-3 SGDR-F 20Hz	Backscatter Coefficient Named sig0_20hz_ku in GDR-D standard. All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (/data_01/ku/sig0_cor_calibration), modeled instrumental errors correction (/data_01/ku/sig0_cor_ocean_model_instr) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_20/ku/sig0_ocean
Poseidon GDR 1Hz	Backscatter Coefficient
SARAL (Drifting Phase) SGDR-T 1Hz	Backscatter Coefficient
SARAL SGDR-T 1Hz	Backscatter Coefficient
Sentinel-3A (SAR) SGDR/NTC 1Hz	Backscatter Coefficient
Sentinel-3B (SAR) SGDR/NTC 1Hz	Backscatter Coefficient
Sentinel-6A (HR) NTC/F08 1Hz	Backscatter Coefficient Standard deviation of 20 Hz measurements. Compression of the 20 Hz measurements is preceded by a detection of outliers. Only valid 20 Hz values are used to compute this 1 Hz measurement. Source: NTC/F08 Original-Parameter: data_01/ku/swh_ocean_rms
Sentinel-6A (HR) NTC/F08 20Hz	Backscatter Coefficient Backscatter coefficient computed from the ocean retracker. It includes all instrumental corrections from net_instr_cor_sig0_ocean and sig0_scaling_factor as well as the atmospheric attenuation correction. Source: NTC/F08 Original-Parameter: data_20/ku/sig0_ocean
Sentinel-6A (LR) NTC/F08 1Hz	Backscatter Coefficient Standard deviation of 20 Hz measurements. Compression of the 20 Hz measurements is preceded by a detection of outliers. Only valid 20 Hz values are used to compute this 1 Hz measurement. Source: NTC/F08 Original-Parameter: data_01/ku/swh_ocean_rms
Sentinel-6A (LR) NTC/F08 20Hz	Backscatter Coefficient Backscatter coefficient computed from the ocean retracker. It includes all instrumental corrections from net_instr_cor_sig0_ocean and sig0_scaling_factor as well as the atmospheric attenuation correction. Source: NTC/F08 Original-Parameter: data_20/ku/sig0_ocean
Topex (Extended Mission) GDR 1Hz	Backscatter Coefficient
Topex (Extended Mission) GDR-F 1Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-4 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_ku
Topex (Extended Mission) GDR-F 20Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-4 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_20hz_ku
Topex GDR 1Hz	Backscatter Coefficient
Topex GDR-F 1Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-4 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_ku
Topex GDR-F 20Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-4 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_20hz_ku

Version 01

Cryosat-2 (SAR) SGDR-E 20Hz	Backscatter Coefficient
Cryosat-2 (SAR, Extended Mission) SGDR-E 20Hz	Backscatter Coefficient
ERS-1 (Phase A) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase B) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase C) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase D) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase E) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase F) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-1 (Phase G) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
ERS-2 SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice1_sig0_20hz
Envisat SGDR v2.1 20Hz	Backscatter Coefficient 18 Hz ku-band ice1 backscatter coefficient Source: SGDR v2.1 Original-Parameter: hz18_ku_ice1_bscat (Field number 78)
Jason-2 SGDR-D 1Hz	Backscatter Coefficient
Jason-2 SGDR-D 20Hz	Backscatter Coefficient 20 Hz Ku band corrected backscatter coefficient (ice retracking) Source: SGDR-D Original-Parameter: ice_sig0_20hz_ku
Jason-3 (Extended Mission) SGDR-F 20Hz	Backscatter Coefficient Named ice_sig0_20hz_ku in GDR-D standard. AGC instrumental errors correction and internal calibration correction (/data_01/ku/sig0_cor_calibration) included Source: SGDR-F Original-Parameter: data_20/ku/sig0_ocog
Jason-3 SGDR-D 1Hz	Backscatter Coefficient
Jason-3 SGDR-D 20Hz	Backscatter Coefficient 20 Hz Ku band corrected backscatter coefficient (ice retracking) Source: SGDR-D Original-Parameter: ice_sig0_20hz_ku
Jason-3 SGDR-F 20Hz	Backscatter Coefficient Named ice_sig0_20hz_ku in GDR-D standard. AGC instrumental errors correction and internal calibration correction (/data_01/ku/sig0_cor_calibration) included Source: SGDR-F Original-Parameter: data_20/ku/sig0_ocog
Sentinel-6A (HR) NTC/F08 20Hz	Backscatter Coefficient Backscatter coefficient computed from OCOG retracking. It includes all calibrated instrument gains from L1B power_scaling_to_antenna plus geometry and antenna gain from sig0_scaling_factor Source: NTC/F08 Original-Parameter: data_20/ku/sig0_ocog
Sentinel-6A (LR) NTC/F08 20Hz	Backscatter Coefficient Backscatter coefficient computed from OCOG retracking. It includes all calibrated instrument gains from L1B power_scaling_to_antenna plus geometry and antenna gain from sig0_scaling_factor Source: NTC/F08 Original-Parameter: data_20/ku/sig0_ocog
Topex (Extended Mission) GDR-F 1Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-3 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku_mle3), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_ku_mle3
Topex (Extended Mission) GDR-F 20Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-3 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku_mle3), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_20hz_ku_mle3
Topex GDR-F 1Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-3 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku_mle3), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_ku_mle3
Topex GDR-F 20Hz	Backscatter Coefficient Sum of Ku-band AGC, MLE-3 retracked Ku-band echoes amplitude correction (including Ku-band point target response correction, given in net_instr_cor_sig0_ku_mle3), amplitude correction to account for satellite altitude, atmospheric attenuation (rad_atm_cor_sig0_ku), and constant Ku-band bias to align with original geophysical data record from side B. Source: GDR-F Original-Parameter: sig0_20hz_ku_mle3

Version 02

ERS-1 (Phase A) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase B) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase C) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase D) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase E) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase F) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-1 (Phase G) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
ERS-2 SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: ice2_sig0_20hz
Envisat SGDR v2.1 1Hz	Backscatter Coefficient
Envisat SGDR v2.1 20Hz	Backscatter Coefficient 18 Hz ku-band ice2 backscatter coefficient Source: SGDR v2.1 Original-Parameter: hz18_ku_ice2_bscat (Field number 82)
Jason-2 SGDR-D 20Hz	Backscatter Coefficient 20 Hz Ku band corrected backscatter coefficient (MLE3 retracking) Source: SGDR-D Original-Parameter: sig0_20hz_ku_mle3
Jason-3 (Extended Mission) SGDR-F 1Hz	Backscatter Coefficient All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (sig0_cor_calibration) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_01/ku/sig0_adaptive
Jason-3 (Extended Mission) SGDR-F 20Hz	Backscatter Coefficient All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (/data_01/ku/sig0_cor_calibration) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_20/ku/sig0_adaptive
Jason-3 SGDR-F 1Hz	Backscatter Coefficient All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (sig0_cor_calibration) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_01/ku/sig0_adaptive
Jason-3 SGDR-F 20Hz	Backscatter Coefficient All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (/data_01/ku/sig0_cor_calibration) and atmospheric attenuation (sig0_cor_atm) Source: SGDR-F Original-Parameter: data_20/ku/sig0_adaptive

Version 03

ERS-1 (Phase A) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase B) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase C) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase D) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase E) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase F) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-1 (Phase G) SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
ERS-2 SGDR/REAPER 20Hz	Backscatter Coefficient All instrumental corrections included, including the system bias and atmospheric attenuation (atmos_corr_sig0). See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: sitrack_sig0_20hz
Envisat SGDR v2.1 20Hz	Backscatter Coefficient 18 Hz ku-band seaice backscatter coefficient Source: SGDR v2.1 Original-Parameter: hz18_ku_seaice_bscat (Field number 84)

Version 04

Cryosat-2 (SAR) SGDR-E 20Hz	Backscatter Coefficient Source: From instr.01 (Cryosat-2 ICE Baseline-E (SAR)) + Envisat sigma nought bias added (3.04 [db]) MVA-Parameters: - Backscatter Coefficient (sigma0.01)
Cryosat-2 (SAR, Extended Mission) SGDR-E 20Hz	Backscatter Coefficient Source: From instr.01 (Cryosat-2 ICE Baseline-E (SAR)) + Envisat sigma nought bias added (3.04 [db]) MVA-Parameters: - Backscatter Coefficient (sigma0.01)

Version 05

All Missions	Backscatter Coefficient Backscatter Coefficient from ALES Retracker

Version 06

All Missions	Backscatter Coefficient Backscatter Coefficient from ALES+ Retracker

Version 07

All Missions	Backscatter Coefficient Backscatter Coefficient from WHALES Retracker