SIR_L2_MDSR_v0

binary record	size: 12
ENVISAT binary datetime id field name definition 0 days binary int32 size: 4 days since January 1st, 2000 (may be negative) unit: "days since 2000-01-01" 1 seconds binary uint32 size: 4 seconds since start of day unit: "s" 2 microseconds binary uint32 size: 4 microseconds since start of second unit: "1e-6 s"

binary uint8	size: 0:3
Measurement mode flag: 0 = other mode (e.g. calibration, acquisition), 1 = LRM, 2 = SAR, 3 = SARin, 4 = SID (SARin degraded case)

binary uint8	size: 0:3
Surface type flag: 0 = open ocean, 1 = closed sea, 2 = continental ice, 3 = land, 4-7 = currently unused

binary record

size: 44

SIRAL L2 measurement id field name definition 0 delta_time binary int32 (double) size: 4 Delta time (to give 20Hz times) unit: "1e-6 s" converted unit: "s" (multiply by 1/1000000) 1 lat binary int32 (double) size: 4 Latitude of measurement (i.e. of the echoing point position) unit: "1e-7 degrees_north" converted unit: "degrees_north" (multiply by 1/10000000) 2 lon binary int32 (double) size: 4 Longitude of measurement (i.e. of the echoing point position) unit: "1e-7 degrees_east" converted unit: "degrees_east" (multiply by 1/10000000) 3 surf_height binary int32 size: 4 Height of surface w.r.t. ellipsoid WSG84 unit: "mm" 4 surf_ht_anom binary int16 size: 2 Interpolated sea surface height anomaly unit: "mm" 5 num_intp_rec_sha binary int16 size: 2 Number of interpolated records for SHA 6 sha_intp_qual binary int16 size: 2 SSHA interpolation quality unit: "mm" 7 bkscat_sigma_0 binary int16 (double) size: 2 Backscatter sigma 0 unit: "1e-2 dB" converted unit: "dB" (multiply by 1/100) 8 peakiness binary uint16 (double) size: 2 Peakiness converted unit: "" (multiply by 1/100) 9 freeb binary int16 size: 2 Freeboard unit: "mm" 10 num_avg binary uint16 size: 2 Number of echoes or beams averaged 11 spare_1 binary bytes size: 2 spare hidden: true 12 meas_qual_flags binary record size: 4 Measurement quality flags: indicate the quality of the 20Hz measurement parameters id field name definition 0 block_degr binary uint8 size: 0:1 Block degraded: 0 = OK, 1 = degraded or zero-filled for padding (if set to 1, block should not be processed) 1 orbit_err binary uint8 size: 0:1 Orbit error: 0 = OK, 1 = error 2 orbit_discnt binary uint8 size: 0:1 Orbit discontinuity: 0 = OK, 1 = orbit discontinuity occurred (e.g. gap) 3 height_err binary uint8 size: 0:1 Height error: 0 = OK, 1 = error in height derivation 4 surf_ht_anom_err binary uint8 size: 0:1 Interpolated sea surface height anomaly error: 0 = no, 1 = error 5 cal_warn binary uint8 size: 0:1 Calibration warning: 0 = OK, 1 = non-nominal calibration correction 6 bkscat_err binary uint8 size: 0:1 Backscatter error: 0 = no, 1 = error 7 peakiness_err binary uint8 size: 0:1 Peakiness error: 0 = no, 1 = error 8 freeb_err binary uint8 size: 0:1 Freeboard error: 0 = OK, 1 = invalid 9 discr_ocean binary uint8 size: 0:1 SARin discriminator = ocean: 0 = no, 1 = yes 10 discr_lead binary uint8 size: 0:1 SARin discriminator = lead: 0 = no, 1 = yes 11 discr_ice binary uint8 size: 0:1 SARin discriminator = ice: 0 = no, 1 = yes 12 discr_unknown binary uint8 size: 0:1 SARin discriminator = unknown: 0 = no, 1 = yes 13 xtrack_err binary uint8 size: 0:1 SARin x-track angle error: 0 = no, 1 = ambiguous angle 14 rx_ch1_err binary uint8 size: 0:1 Receive chain 1 error for SARin: 0 = OK, 1 = degraded or missing 15 rx_ch2_err binary uint8 size: 0:1 Receive chain 2 error for SARin: 0 = OK, 1 = degraded or missing 16 instr_flag binary uint8 size: 0:1 Siral identifier: 0 = Nominal, 1 = Redundant 17 surf_model binary uint8 size: 0:1 Surface model available: 0 = OK, 1 = no DEM/SLOPE model for location 18 misp_err binary uint8 size: 0:1 Mispointing error: 0 = OK, 1 = error during calculation 19 dt_err binary uint8 size: 0:1 Delta time error: 0 = OK, 1 = error during calculation 20 spare binary bytes size: 1:4 padding hidden: true 13 spare_2 binary bytes size: 8 spare hidden: true