Recordmaps by Mission

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

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