Version | Date | Comments |
---|---|---|
v3.2 | 15.10.2018 | Official ESA release |
Product Description
Overview
Table 1: Overview of SMOS Product
Parameter | Sea ice thickness |
Spatial covergae | N: 90°, S:50°, E:180°, W:-180° |
Spatial Resolution | 12.5 km x12.5 km |
Temporal Coverage: | since 15. Oct. 2018 |
Temporal Resolution | 1 day |
Data Format(s) | NetCDF |
Platforms | SMOS |
Version | v3.2 |
File naming convention
NetCDF files are named as:
SMOS_Icethickness_v3.2_north_<date>.nc
File Format
Daily mean SMOS sea ice thickness is given in NetCDF v3 format. Global attributes are given in Table 2. The variables are given as grid arrays, see, therefore Table 3.
Table 2: Global attributes from an example NetCDF file.
Attribute | Value |
---|---|
title | |
description | |
summary | |
keywords | |
product_version | |
processing_mode | |
time_of_creation | |
history | |
Conventions | |
spatial_resolution | |
geospatial_lat_min | |
geospatial_lat_max | |
geospatial_lon_min | -180.0 |
geospatial_lon_max | 180.0 |
geospatial_vertical_min | 0.0 |
geospatial_vertical_max | 0.0 |
time_coverage_start | 2018-10-28T00:00:00Z |
time_coverage_end | 2018-10-28T23:59:00Z |
time_coverage_duration | P1D |
time_coverage_resolution | P1D |
platform | SMOS |
project | CS2SMOS PDS: SMOS & CryoSat-2 Sea Ice Data Product Processing and Dissemination Service |
institution | Alfred-Wegener-Institut Helmholtz Zentrum für Polar und Meeresforschung (AWI), http://www.awi.de |
creator_name | Alfred-Wegener-Institut Helmholtz Zentrum für Polar und Meeresforschung (AWI), http://www.awi.de |
creator_type | institution |
creator_url | |
publisher_email | |
references | |
_CoordSysBuilder | ucar.nc2.dataset.conv.CF1Convention |
Table 3: NetCDF file content. Note, that we use a scaling factor of 10^-3 and a fillvalue = -2147483647.
Variable | Description | Unit | Type | Dimension |
---|---|---|---|---|
Lambert_Azimuthal_Grid | Add description | - | int | - |
time_bnds | Start and end time of the weekly retrieval | seconds since 1978-01-01 00:00:00 | int | 2 |
analysis_ice_thickness | CS2SMOS weekly merged sea ice thickness | m | Int | 1,432,432 |
background_ice_thickness | background field, interpolation using CS2 and SMOS sea ice thickness data | m | Int | 1,432,432 |
weighted_mean_ice_thickness | weighted mean of weekly CS2 and SMOS ice thickness retrievals | m | Int | 1,432,432 |
innovation | difference between background and analysis ice thickness | m | Int | 1,432,432 |
ice_conc | sea ice concentration | % | Int | 1,432,432 |
ice_type | sea ice type (OSI-403-c) | - | Int | 1,432,432 |
correlation_length_scale | correlation length scale of background ice thickness | m | Int | 1,432,432 |
analysis_thickness_unc | uncertainty of the merged sea ice thickness | m | Int | 1,432,432 |
smos_ice_thickness | weekly averaged SMOS ice thickness | m | Int | 1,432,432 |
cs2_ice_thickness | weekly averaged CryoSat-2 ice thickness | m | Int | 1,432,432 |
time | reference time of product (middle of the week) | seconds since 1978-01-01 00:00:00 | Int | 1 |
xc | x coordinate of projection (eastings) | km | Int | 432 |
yc | y coordinate of projection (northings) | km | Int | 432 |
lon | longitude coordinate | degrees_north | Int | 432,432 |
lat | latitude coordinate | degrees_east | int | 432,432 |
Grid
Links
ESA Websites:
Visualization of NetCDF data: