3.6.2. L1B Output Files

3.6.2.1. File Description

The L1B file is the primary output created by the dedop processor. Each record in the L1B file represents information about a surface position beneath the satellite track.

3.6.2.2. Dimensions

  • time_l1b_echo_sar_ku
    • description: Number of L1B ECHO_SAR_Ku measurements
  • echo_sample_ind
    • description: Number of samples in a waveform
  • max_multi_stack_ind
    • description: Maximum number of multilook beams per stack

3.6.2.3. Variables

  • time_l1b_echo_sar_ku
    • description: UTC Seconds since 2000-01-01 00:00:00.0
  • UTC_day_l1b_echo_sar_ku
    • description: UTC Days since 2000-01-01 00:00:00.0
  • UTC_sec_l1b_echo_sar_ku
    • description: Seconds since the start of the current UTC day
  • GPS_time_l1b_echo_sar_ku
    • description: GPS time
  • isp_coarse_time_l1b_echo_sar_ku
    • description: ISP coarse time
  • isp_fine_time_l1b_echo_sar_ku
    • description: ISP fine time
  • sral_fine_time_l1b_echo_sar_ku
    • description: ISP SRAL fine datation
  • lat_l1b_echo_sar_ku
    • description: latitude (degrees north)
  • lon_l1b_echo_sar_ku
    • description: longitude (degrees east)
  • alt_l1b_echo_sar_ku
    • description: altitude of satellite
  • orb_alt_rate_l1b_echo_sar_ku
    • description: orbital altitude rate
  • flag_time_status_l1b_echo_sar_ku
    • description: time status flag
  • time_time_corr_val_l1b_echo_sar_ku
    • description: time correlation validity flag
  • flag_man_pres_l1b_echo_sar_ku
    • description: manoeuvre presence flag (no manoeuvre/ongoing manoeuvre)
  • flag_man_thrust_l1b_echo_sar_ku
    • description: manoeuvre thrust flag (no thrust/ongoing thrust)
  • flag_man_plane_l1b_echo_sar_ku
    • description: manoeuvre plane flag (in plane/out of plane)
  • flag_gnss_status_l1b_echo_sar_ku
    • description: validity flag for the navigation message from the gnss receiver
  • x_pos_l1b_echo_sar_ku
    • description: satellite altitude - x component
  • y_pos_l1b_echo_sar_ku
    • description: satellite altitude - y component
  • z_pos_l1b_echo_sar_ku
    • description: satellite altitude - z component
  • x_vel_l1b_echo_sar_ku
    • description: satellite velocity - x component
  • y_vel_l1b_echo_sar_ku
    • description: satellite velocity - y component
  • z_vel_l1b_echo_sar_ku
    • description: satellite velocity - z component
  • nav_bul_status_l1b_echo_sar_ku
    • description: navigation bulletin status (ok/ko)
  • nav_bul_source_l1b_echo_sar_ku
    • description: navigation bulletin source identifier (gps/doris)
  • nav_bul_coarse_time_l1b_echo_sar_ku
    • description: navigation bulletin coarse time
  • nav_bul_fine_time_l1b_echo_sar_ku
    • description: navigation bulletin fine time
  • seq_count_l1b_echo_sar_ku
    • description: sequence count
  • isp_time_status_echo_sar_ku
    • description: ISP time status
  • oper_instr_l1b_echo_sar_ku
    • description: operating instrument
  • SAR_mode_l1b_echo_sar_ku
    • description: LRM mode identifier
  • cl_gain_l1b_echo_sar_ku
    • description: tracking configuration - closed loop gain
  • acq_stat_l1b_echo_sar_ku
    • description: tracking configuration - acquisition status
  • dem_eeprom_l1b_echo_sar_ku
    • description: tracking configuration - DEM EEPROM read access
  • weighting_l1b_echo_sar_ku
    • description: altimeter configuration - weighting function
  • loss_track_l1b_echo_sar_ku
    • description: loss of track criterion
  • h0_nav_dem_l1b_echo_sar_ku
    • description: altitude command H0 computed with nav DEM
  • h0_applied_l1b_echo_sar_ku
    • description: applied altitude command H0
  • cor2_nav_dem_l1b_echo_sar_ku
    • description: altitude command COR2 computed with nav DEM
  • cor2_applied_l1b_echo_sar_ku
    • description: applied altitude command COR2
  • dh0_l1b_echo_sar_ku
    • description: distance error computed on the echo of the cycle (N-2) in open loop mode
  • agccode_ku_l1b_echo_sar_ku
    • description: AGCCODE for ku band
  • surf_type_l1b_echo_sar_ku
    • description: altimeter surface type
  • range_ku_l1b_echo_sar_ku
    • description: corrected range for ku band
  • uso_cor_l1b_echo_sar_ku
    • description: USO frequency drift correction
  • int_path_cor_ku_l1b_echo_sar_ku
    • description: internal path correction for ku band
  • range_rate_l1b_echo_sar_ku
    • description: range rate
  • agc_ku_l1b_echo_sar_ku
    • description: corrected AGC for ku band
  • scale_factor_ku_l1b_echo_sar_ku
    • description: scaling factor for sigma0 evaluation for ku band
  • agc_cor_ku_l1b_echo_sar_ku
    • description: correction for instrumental errors on AGC for ku band
  • sig0_cal_ku_l1b_echo_sar_ku
    • description: internal calibration correction on Sigma0 for ku band
  • nb_stack_l1b_echo_sar_ku
    • description: number of waveforms summed in stack
  • max_stack_l1b_echo_sar_ku
    • description: maximum power of stack
  • stdev_stack_l1b_echo_sar_ku
    • description: standard deviation of stack
  • skew_stack_l1b_echo_sar_ku
    • description: skewness of stack
  • kurt_stack_l1b_echo_sar_ku
    • description: kurtosis of stack
  • beam_ang_l1b_echo_sar_ku
    • description: look angles in stack
  • beam_form_l1b_echo_sar_ku
    • description: flag on beam formation quality in stack
  • i2q2_meas_ku_l1b_echo_sar_ku
    • description: I2+Q2 measurement for ku band