| Mission | ERS-1 (Phase D) |
| MVA-Name | ers1d |
| Source | SGDR/REAPER |
| Frequency | 1 |
dhdt.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 4 | -3 | m/s | dhdt | altitude rate
Altitude rate of satellite with respect to the reference ellipsoid. Source: SGDR/REAPER Original-Parameter: orb_alt_rate |
ebias.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | emb | Sea State Bias
Source: SGDR/REAPER Original-Parameter: sea_state_bias |
instr.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | +4 | - | sec | isec | Integer Seconds Elapsed Since Epoch
Time counted in seconds since 1990-01-01 00:00:00. Source: SGDR/REAPER Original-Parameter: time |
| 2 | +4 | -6 | sec | msec | Microseconds, Fractional Part of isec
Time counted in seconds since 1990-01-01 00:00:00. Source: SGDR/REAPER Original-Parameter: time |
| 3 | +4 | -3 | m | ralt | Altimeter Range
All instrumental corrections included, and system bias. Source: SGDR/REAPER Original-Parameter: ocean_range |
| 4 | +2 | -3 | m | stdalt | RMS of Altimeter Range
Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high rate values are used to compute this element. Source: SGDR/REAPER Original-Parameter: ocean_range_rms |
| 5 | 2 | -2 | m | swh | Significant Wave Height
Computed directly from sigma c. No bias correction. Source: SGDR/REAPER Original-Parameter: swh |
| 6 | +2 | -2 | m | stdswh | RMS of Significant Wave Height
Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high rate values are used to compute this element. Source: SGDR/REAPER Original-Parameter: swh_rms |
| 7 | +2 | -2 | db | sigma0 | 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 |
| 8 | +1 | -1 | m/s | windsp | Wind Speed
Should not be used over land. See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: wind_speed_alt |
| 9 | +1 | - | - | iflags | Instrument Status and Quality Flags
Source: SGDR/REAPER Original-Parameter: swh, swh_rms, ocean_range_numval, ocean_range, ocean_range_rms Flags: 2 : swh_ku == 0 || swh_rms_ku/swh_ku > 0.1 8 : ocean_range_numval < 12 128 : range_ku == nan || range_rms_ku == nan |
invbm.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | invb | Inverse Barometer Effect
Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. An inverse barometric correction must be added (negative value) to the instrument range to correct this range measurement delays to the radar pulse due to air pressure. This field is a component of hf_fluctuations_corr so do not apply both. See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: inv_bar_corr |
ionos.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | ionos | Ionospheric correction
An ionospheric correction must be added (negative value) to the instrument range to correct this range measurement for ionospheric range delays of the radar pulse. See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: iono_corr_gps |
ionos.01
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | ionos | Ionospheric correction
An ionospheric correction must be added (negative value) to the instrument range to correct this range measurement for ionospheric range delays of the radar pulse. See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: iono_corr_model |
orbit.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | +4 | -6 | deg | glon | Longitude
East longitude relative to Greenwich meridian. Source: SGDR/REAPER Original-Parameter: lon |
| 2 | 4 | -6 | deg | glat | Latitude
Positive latitude is North latitude, negative latitude is South latitude Source: SGDR/REAPER Original-Parameter: lat |
| 3 | +4 | -3 | m | hsat | Satellite Altitude
Altitude of satellite above the reference ellipsoid. Source: SGDR/REAPER Original-Parameter: alt |
| 4 | +1 | - | - | oflags | Orbit Status and Quality Flags |
orbit.24
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | +4 | -6 | deg | glon | Longitude |
| 2 | 4 | -6 | deg | glat | Latitude |
| 3 | +4 | -3 | m | hsat | Satellite Altitude |
| 4 | +1 | - | - | oflags | Orbit Status and Quality Flags |
slafg.31
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | sla | Sea Level Anomalies
MVA-Parameters: - Altimeter Range (ralt.00) - Pole Tide Correction (ptide.00) - Ocean Tide Correction of EOT11a (otide.15) - Dry Tropospheric Correction (dtrop.00) - Ocean Load Tide Correction of EOT11a (ltide.15) - Satellite Altitude (hsat.24) - Mean Sea Surface Height from CLS2011 (mssh.04) - Instrument Status and Quality Flags (iflags.00) - Orbit Status and Quality Flags (oflags.00) - MMXO15 (oer.15) - Sea State Bias (emb.00) - Inverse Barometer Effect from DAC (AVISO) (invb.05) - Wet Tropospheric Correction (wtrop.00) - NOAA Ionosphere Climatology 2009 (NIC09) (ionos.07) - Solid Earth Tide Correction (etide.00) |
| 2 | +1 | - | - | gflags | Geophysical Corrections Quality Flags |
slafg.33
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | sla | Sea Level Anomalies
CLS11, EOT11a, DAC, MMXO16 MVA-Parameters: - Orbit Status and Quality Flags (oflags.00) - Satellite Altitude (hsat.24) - Instrument Status and Quality Flags (iflags.00) - Undefined parameter (etide.00) - Mean Sea Surface Height from CLS2011 (mssh.04) - Inverse Barometer Effect from DAC (AVISO) (invb.05) - Dry Tropospheric Correction (dtrop.00) - Wet Tropospheric Correction (wtrop.00) - Undefined parameter (oer.66) - Altimeter Range (ralt.00) - Ocean Tide Correction of EOT11a (otide.15) - Ocean Load Tide Correction of EOT11a (ltide.15) - NOAA Ionosphere Climatology 2009 (NIC09) (ionos.07) - Undefined parameter (ptide.00) - Sea State Bias (emb.00) |
| 2 | +1 | - | - | gflags | Geophysical Corrections Quality Flags
MVA-Parameters: - Fractional Ice Concentration from NSIDC (fic.01) - Dry Tropospheric Correction (dtrop.00) - Wet Tropospheric Correction (wtrop.00) - Undefined parameter (oer.66) - NOAA Ionosphere Climatology 2009 (NIC09) (ionos.07) - Sea State Bias (emb.00) |
slafg.40
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | sla | Sea Level Anomalies
DTU15, EOT20, DAC, MMXO22 |
| 2 | +1 | - | - | gflags | Geophysical Corrections Quality Flags |
sshfg.33
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 4 | -3 | m | ssh | Sea Surface Heights
consistent with SLA version 33 and CLS11 MVA-Parameters: - Mean Sea Surface Height from CLS2011 (mssh.04) - CLS11, EOT11a, DAC, MMXO16 (sla.33) - Land Ocean Flags from GMT (lwmask.00) |
| 2 | +1 | - | - | sflag | Geophysical Corrections Quality Flags
MVA-Parameters: - Geophysical Corrections Quality Flags (gflags.33) - CLS11, EOT11a, DAC, MMXO16 (sla.33) - Land Ocean Flags from GMT (lwmask.00) |
sshfg.40
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 4 | -3 | m | ssh | Sea Surface Heights
consistent with SLA version 40 and DTU15 MVA-Parameters: - Mean Sea Surface Height from DTU15 (mssh.05) - DTU15, EOT20, DAC, MMXO22 (sla.40) - Land Ocean Flags from GMT (lwmask.01) |
| 2 | +1 | - | - | sflag | Geophysical Corrections Quality Flags
MVA-Parameters: - Land Ocean Flags from GMT (lwmask.01) - Geophysical Corrections Quality Flags (gflags.40) - DTU15, EOT20, DAC, MMXO22 (sla.40) |
tidee.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | etide | Solid Earth Tide Correction |
| 2 | 2 | -3 | m | ptide | Pole Tide Correction |
tropd.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | dtrop | Dry Tropospheric Correction |
tropw.00
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | wtrop | Wet Tropospheric Correction |
tropw.01
| Pos | Size | Scaling | Unit | Name | Version Specific Description |
|---|---|---|---|---|---|
| 1 | 2 | -3 | m | wtrop | Wet Tropospheric Correction
Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. A wet tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for wet tropospheric range delays of the radar pulse. See REAPER User Handbook. Source: SGDR/REAPER Original-Parameter: model_wet_tropo_corr |