| Mission | Cryosat-2 (SAR) |
| MVA-Name | cryosatE_sar_hf |
| Source | SGDR-E |
| Frequency | 20 |
ebias.04
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | emb | Sea State Bias
A sea state bias correction must be added (negative value) to the instrument range to correct this range measurement for sea state delays of the radar pulse. This element should not be used over land. Sea State Bias background model derived from Cryosat-2 GOP Baseline-C (SAR) ocean retracker and fitted via LSQ 2-degree polynomial surface. SWH, Sigma0 (for wind speed computation) derived from instr.04. Limitation: ssb>0, ssb set to 0 Source: Model from Cryosat-2 GOP Baseline-C Original-Parameter: swh_ocean_01_ku, wind_speed_alt_01_ku, sea_state_bias_01_ku |
instr.01
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | +4 | - | sec | isec | Integer Seconds Elapsed Since Epoch |
| 2 | +4 | -6 | sec | msec | Microseconds, Fractional Part of isec |
| 3 | +4 | -3 | m | ralt | Altimeter Range |
| 4 | +2 | -3 | m | stdalt | RMS of Altimeter Range |
| 5 | 2 | -2 | m | swh | Significant Wave Height |
| 6 | +2 | -2 | m | stdswh | RMS of Significant Wave Height |
| 7 | +2 | -2 | db | sigma0 | Backscatter Coefficient |
| 8 | +1 | -1 | m/s | windsp | Wind Speed |
| 9 | +1 | - | - | iflags | Instrument Status and Quality Flags |
instr.04
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | +4 | - | sec | isec | Integer Seconds Elapsed Since Epoch
Source: instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - Integer Seconds Elapsed Since Epoch (isec.01) |
| 2 | +4 | -6 | sec | msec | Microseconds, Fractional Part of isec
Source: instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - Microseconds, Fractional Part of isec (msec.01) |
| 3 | +4 | -3 | m | ralt | Altimeter Range
Range from SAMOSA+ (sampy) Retracker Source: From instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - Altimeter Range (ralt.01) |
| 4 | +2 | -3 | m | stdalt | RMS of Altimeter Range
Source: instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - RMS of Altimeter Range (stdalt.01) |
| 5 | 2 | -2 | m | swh | Significant Wave Height
Significant Wave Height from SAMOSA+ (sampy) Retracker Source: From instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - Significant Wave Height (swh.01) |
| 6 | +2 | -2 | m | stdswh | RMS of Significant Wave Height
Source: instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - RMS of Significant Wave Height (stdswh.01) |
| 7 | +2 | -2 | db | sigma0 | 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) |
| 8 | +1 | -1 | m/s | windsp | Wind Speed
sigma0 > 30 db, wind set to 0; sigma0 < 3 db, wind set to NaN Source: Backscatter coefficient from instr.04 converted to wind speed via Envisat wind model Reference: Envisat wind model (Saleh, 2007, DOI: 10.1080/01490419.2012.718676) |
| 9 | +1 | - | - | iflags | Instrument Status and Quality Flags
Source: instr.01 (Cryosat-2 ICE Baseline-E (SAR)) MVA-Parameters: - Instrument Status and Quality Flags (iflags.01) |