Radar Freeboard Monitoring
Radar freeboard of each 20 Hz measurement: the height of the radar scattering horizon above the local sea surface, from the sea ice processing of SAR and SARin mode measurements (fill value in LRM mode). Freeboard can be a small negative value due to noise in the height and in the interpolated sea surface. By default measurements with the freeboard error flag set are excluded. The 10 km grid maps show a statistic (ie the median) of the measurements in each cell of a 10 km polar stereographic grid, with statistics of the cell values.
Freeboard error not set: measurements with the freeboard_error bit (mask 65536) of flag_prod_status_20_ku set are excluded.
Baseline-F, cycle 194: 25-Aug-2026 to 23-Sep-2026 · 263 GDR-A files · data covers 18.1 of 30 days Partial cycle processed 11-Oct-2026 01:13 UTC
Radar Freeboard: Freeboard error not set, All modes: Maps
Radar Freeboard: Freeboard error not set, All modes: Cycle 194 Statistics
| Area | Records | Valid | Mean (m) | Median (m) | Std Dev (m) | RMS (m) | Min (m) | Max (m) |
|---|---|---|---|---|---|---|---|---|
| Global | 32,941,951 | 93,908 (0.3%) | 0.12 | 0.12 | 0.18 | 0.22 | -0.30 | 2.98 |
| North Polar (>60N) | 5,641,750 | 0 (0.0%) | – | – | – | – | – | – |
| South Polar (<60S) | 5,553,821 | 91,390 (1.6%) | 0.12 | 0.12 | 0.18 | 0.22 | -0.30 | 2.98 |
Statistics use every 20 Hz measurement of the cycle within each area. Std Dev is the population standard deviation, RMS the root mean square.
Radar Freeboard: Freeboard error not set, All modes: Trends
Click a point to show that cycle.
