| id | field name | definition |
|---|
| 0 | zero_doppler_time |
| binary time | size: 12 |
|---|
Zero Doppler Time (MJD format)
unit: "s since 2000-01-01"
value: float(./days) * 86400 + float(./seconds) + float(./microseconds) / 1000000
| binary record | size: 12 |
|---|
ENVISAT binary datetime
| id | field name | definition |
|---|
| 0 | days |
| binary int32 | size: 4 |
|---|
days since January 1st, 2000 (may be negative)
unit: "days since 2000-01-01"
|
|
| 1 | seconds |
| binary uint32 | size: 4 |
|---|
seconds since start of day
unit: "s"
|
|
| 2 | microseconds |
| binary uint32 | size: 4 |
|---|
microseconds since start of second
unit: "1e-6 s"
|
|
|
|
|
| 1 | quality_flag |
| binary int8 | size: 1 |
|---|
|
Quality Indicator (-1 for blank MDSR, 0 otherwise)
|
|
| 2 | range_spectral_res |
| binary float | size: 4 |
|---|
|
Range spectral resolution of the cartesian cross spectrum
|
|
| 3 | az_spectral_res |
| binary float | size: 4 |
|---|
|
Azimuth spectral resolution of the cartesian cross spectrum
|
|
| 4 | ambiguity_removal_factor |
| binary float | size: 4 |
|---|
|
Ambiguity removal factor
|
hidden: true
|
| 5 | spec_tot_energy |
| binary float | size: 4 |
|---|
|
Spectrum Total Energy
|
|
| 6 | spec_max_energy |
| binary float | size: 4 |
|---|
|
Spectrum Max Energy
|
|
| 7 | spec_max_dir |
| binary float | size: 4 |
|---|
Direction of Spectrum Max (deg)on higher resolution grid
unit: "degrees"
|
|
| 8 | spec_max_wl |
| binary float | size: 4 |
|---|
Wavelength of Spectrum Max (m)on higher resolution grid
unit: "m"
|
|
| 9 | az_image_shift_var |
| binary float | size: 4 |
|---|
Variance of the azimuth image shift caused by the orbital velocity
unit: "m2"
|
|
| 10 | az_cutoff |
| binary float | size: 4 |
|---|
Azimuthal Clutter Cut-off length (m)
unit: "m"
|
|
| 11 | nonlinear_spectral_width |
| binary float | size: 4 |
|---|
Spectral width of the non-linear part of the cross spectra
unit: "m"
|
|
| 12 | image_intensity |
| binary float | size: 4 |
|---|
|
Image intensity
|
|
| 13 | image_variance |
| binary float | size: 4 |
|---|
|
Normalised image variance
|
|
| 14 | spare_2 |
| binary bytes | size: 56 |
|---|
|
Spare
|
hidden: true
|
| 15 | min_spectrum |
| binary float | size: 4 |
|---|
Min value of ocean wave spectrum
unit: "m4"
|
|
| 16 | max_spectrum |
| binary float | size: 4 |
|---|
Max value of ocean wave spectrum
unit: "m4"
|
|
| 17 | spare_3 |
| binary bytes | size: 8 |
|---|
|
Spare
|
hidden: true
|
| 18 | wind_speed |
| binary float | size: 4 |
|---|
Forcast Wind speed (if provided)
unit: "m/s"
|
|
| 19 | wind_direction |
| binary float | size: 4 |
|---|
Forcast Wind direction (if provided)
unit: "degrees"
|
|
| 20 | norm_inv_wave_age |
| binary float | size: 4 |
|---|
|
Normalized inverse wave age
|
|
| 21 | SAR_wave_height |
| binary float | size: 4 |
|---|
SAR swell wave height
unit: "m"
|
|
| 22 | SAR_az_shift_var |
| binary float | size: 4 |
|---|
Variance of the azimuth shift computed from the SAR swell wave spectra
unit: "m2"
|
|
| 23 | backscatter |
| binary float | size: 4 |
|---|
Backscattering coefficient
unit: "dB"
|
|
| 24 | confidence_swell |
| binary uint16 | size: 2 |
|---|
|
Confidence measure of the swell inversion
|
|
| 25 | signal_to_noise |
| binary float | size: 4 |
|---|
|
Average signal-to-noise ratio
|
|
| 26 | radar_vel_corr |
| binary float | size: 4 |
|---|
Radar velocity off-set correction
unit: "m/s"
|
|
| 27 | cmod_cal_const |
| binary float | size: 4 |
|---|
|
Calibration constant - CMOD
|
|
| 28 | confidence_wind |
| binary uint16 | size: 2 |
|---|
|
Confidence measure of the wind retrieval
|
|
| 29 | spare_4 |
| binary bytes | size: 24 |
|---|
|
Spare
|
hidden: true
|
| 30 | ocean_spectra |
| binary array[dim_0, dim_1] |
|---|
Ocean Wave Swell spectra polar grid. Number of bins in wavelength and direction defined in SPH (nominally 24 by 36). Arranged as 24 wavelength cells from shortest to longest wavelength, for zero degrees, then 10 degrees, up to 350 degrees.
dim_0: $num_wl_bins
dim_1: $num_dir_bins
|
|