Recordmaps by Mission

Mission ERS-1 (Phase B)
MVA-Name ers1b
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
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. See REAPER User Handbook.
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, stdalt, ralt
Flags:
2: swh == 0 or swh_rms/swh > 0.1
8: ocean_range_numval < 12 || ocean_range_numval > 20
128 : stdalt = nan || ralt == 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
Source: SGDR/REAPER
Original-Parameter: bathymetry, rad_surf_type
Flags:
flags<>2 : bathymetry > -2000
4 : bathymetry > -200
8 : rad_surf_type == 1
16 : bathymetry > 0

tidee.00

Pos Size Scaling Unit Name Version Specific Description
1 2 -3 m etide Solid Earth Tide Correction
The permanent tide (zero frequency) is not included. See REAPER User Handbook.
Source: SGDR/REAPER
Original-Parameter: solid_earth_tide
2 2 -3 m ptide Pole Tide Correction
See REAPER User Handbook.
Source: SGDR/REAPER
Original-Parameter: pole_tide

tropd.00

Pos Size Scaling Unit Name Version Specific Description
1 2 -3 m dtrop Dry Tropospheric Correction
Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. A dry tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for dry tropospheric range delays of the radar pulse. See REAPER User Handbook.
Source: SGDR/REAPER
Original-Parameter: model_dry_tropo_corr

tropw.00

Pos Size Scaling Unit Name Version Specific Description
1 2 -3 m wtrop Wet Tropospheric Correction
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: rad_wet_tropo_corr

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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