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| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible
| Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data | graph | files | public | Normalized Radar Cross Section, SAR Composite, Near Real-Time, 1km, North Pole, Daily |
| M | background
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| noaacwSARnrcsnpoleDaily |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | cdm_data_type | String | Grid |
| attribute | NC_GLOBAL | contributor_name | String | NOAA STAR, U.S. National Ice Center |
| attribute | NC_GLOBAL | contributor_role | String | Producer, Publisher, Advisor, Software Developer, Originator |
| attribute | NC_GLOBAL | Conventions | String | CF-1.6, ACCD-1.3, COARDS, ACDD-1.3 |
| attribute | NC_GLOBAL | creator_email | String | sean.helfrich@noaa.gov,christopher.jackson@noaa.gov,tyler.ruff@noaa.gov |
| attribute | NC_GLOBAL | creator_institution | String | NOAA/NESDIS/STAR/SOCD |
| attribute | NC_GLOBAL | creator_name | String | NOAA STAR SOCD Water Surface Conditions/SAR Team |
| attribute | NC_GLOBAL | creator_type | String | institution |
| attribute | NC_GLOBAL | creator_url | String | https://www.star.nesdis.noaa.gov/socd/mecb/sar/index.html |
| attribute | NC_GLOBAL | cw_projection | String | Polar Stereographic |
| attribute | NC_GLOBAL | cw_software_name | String | SAR Operational Product System |
| attribute | NC_GLOBAL | cw_software_version | String | 3 |
| attribute | NC_GLOBAL | date_created | String | 2025-04-13T14:00:07Z |
| attribute | NC_GLOBAL | frame_count | int | 700 |
| attribute | NC_GLOBAL | grid_mapping_false_easting | double | 0.0 |
| attribute | NC_GLOBAL | grid_mapping_false_northing | double | 0.0 |
| attribute | NC_GLOBAL | grid_mapping_inverse_flattening | double | 298.257223563 |
| attribute | NC_GLOBAL | grid_mapping_latitude_of_projection_origin | double | 90.0 |
| attribute | NC_GLOBAL | grid_mapping_name | String | polar_stereographic |
| attribute | NC_GLOBAL | grid_mapping_proj4 | String | +proj=stere +lat_0=90 +lat_ts=60 +lon_0=-45 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs |
| attribute | NC_GLOBAL | grid_mapping_semi_major_axis | double | 6378137.0 |
| attribute | NC_GLOBAL | grid_mapping_spatial_ref | String | PROJCS["unknown",GEOGCS["unknown",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",60],PARAMETER["central_meridian",-45],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",SOUTH],AXIS["Northing",SOUTH]] |
| attribute | NC_GLOBAL | grid_mapping_standard_parallel | double | 60.0 |
| attribute | NC_GLOBAL | grid_mapping_straight_vertical_longitude_from_pole | double | -45.0 |
| attribute | NC_GLOBAL | grid_mapping_units | String | m |
| attribute | NC_GLOBAL | history | String | 13 April 2025 14:00Z: NetCDF file generated from file NRCS_Composite_1kmCR_2025102T0000_2025102T2359_N700_4Byte.dat |
| attribute | NC_GLOBAL | infoUrl | String | https://www.star.nesdis.noaa.gov/socd/mecb/sar/index.html |
| attribute | NC_GLOBAL | institution | String | NOAA/NESDIS/STAR/SOCD |
| attribute | NC_GLOBAL | instrument | String | C-SAR |
| attribute | NC_GLOBAL | keywords | String | active, aperture, arctic, backscatter, backwards, c-sar, coefficient, composite, cross, cryosphere, data, earth, EARTH REMOTE SENSING INSTRUMENTS > ACTIVE REMOTE SENSING > IMAGING RADARS > C-SAR, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Spectral/Engineering > Radar > Radar Backscatter, engineering, environmental, extent, geographic, GEOGRAPHIC REGION > ARCTIC, GEOGRAPHIC REGION > NORTHERN HEMISPHERE, GEOGRAPHIC REGION > POLAR, hemisphere, ice, imaging, information, instruments, level, national, nesdis, noaa, normalized, northern, NRCS, polar, radar, radars, region, remote, sar, satellite, scattering, science, sea, section, sensing, service, socd, spectral, star, surface, surface waves, surface_backwards_scattering_coefficient_of_radar_wave, synthetic, time, wave, waves |
| attribute | NC_GLOBAL | keywords_vocabulary | String | GCMD Science Keywords |
| attribute | NC_GLOBAL | license | String | Contains modified Copernicus Sentinel data 2025 (https://sentinel.esa.int/documents/247904/690755/Sentinel_Data_Legal_Notice/). Sentinel data is obtained from https://scihub.copernicus.eu/dhus. RADARSAT Constellation Mission Imagery Copyright Government of Canada 2025. RCM data is obtained from https://www.eodms-sgdot.nrcan-rncan.gc.ca/index-en.html. RADARSAT-2 Data and Products Copyright MDA Geospatial Services Inc. 2025 - All Rights Reserved. RADARSAT is an official mark of the Canadian Space Agency. RADARSAT-2 data is provided by https://mda.space/en/. The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. |
| attribute | NC_GLOBAL | naming_authority | String | gov.noaa.ncei |
| attribute | NC_GLOBAL | platform | String | SENTINEL-1A/B,RADARSAT-2,RADARSAT |
| attribute | NC_GLOBAL | platform_vocabulary | String | NASA Global Change Master Directory (GCMD) Keywords, Version 9.0 |
| attribute | NC_GLOBAL | processing_level | String | NOAA Level 2 |
| attribute | NC_GLOBAL | product_version | String | 1 |
| attribute | NC_GLOBAL | project | String | SAR Operational Product System |
| attribute | NC_GLOBAL | publisher_institution | String | NOAA STAR |
| attribute | NC_GLOBAL | publisher_name | String | NOAA STAR |
| attribute | NC_GLOBAL | publisher_type | String | institution |
| attribute | NC_GLOBAL | publisher_url | String | https://www.star.nesdis.noaa.gov/ |
| attribute | NC_GLOBAL | references | String | Synthetic Aperture Radar Marine Users Manual. Ed C.R Jackson and J.R. Apel: NOAA: Washington, DC, USA, 2004. ISBN 0-16-073214-X |
| attribute | NC_GLOBAL | source | String | SENTINEL-1A/1B, RADARSAT-2, and RADARSAT Contellation Mission SAR imagery |
| attribute | NC_GLOBAL | sourceUrl | String | (local files) |
| attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v70 |
| attribute | NC_GLOBAL | summary | String | This file contains a composite of Synthetic Aperture Radar (SAR) Normalized Radar Cross Section (NRCS) images covering the Arctic for a period of one day. The files are produced in SAROPS (SAR Operational Product System) by the Water Surface Conditions/Sea Surface Roughness group within the NOAA STAR Satellite Oceanography and Climatology Division. Data from the following C-Band SAR systems are included: Sentinel-1A/B, RADARSAT-2, and RADARSAT Constellation Mission. NRCS values have been calibrated with values given by the SAR data provider. Daily coverage may vary due to limitations in data availability. |
| attribute | NC_GLOBAL | testOutOfDate | String | now-3days |
| attribute | NC_GLOBAL | time_coverage_duration | String | P1D |
| attribute | NC_GLOBAL | time_coverage_end | String | 2025-04-12T23:59:59Z |
| attribute | NC_GLOBAL | time_coverage_resolution | String | P1D |
| attribute | NC_GLOBAL | time_coverage_start | String | 2022-03-05T23:59:59Z |
| attribute | NC_GLOBAL | title | String | Normalized Radar Cross Section, SAR Composite, Near Real-Time, 1km, North Pole, Daily |
| dimension | time | double | nValues=1120, evenlySpaced=false, averageSpacing=1 day 0h 19m 18s | |
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | 1.646524799E9, 1.744502399E9 |
| attribute | time | axis | String | T |
| attribute | time | CoordinateAxisType | String | Time |
| attribute | time | ioos_category | String | Time |
| attribute | time | long_name | String | Time |
| attribute | time | standard_name | String | time |
| attribute | time | time_origin | String | 01-JAN-1970 00:00:00 |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| dimension | level | byte | nValues=1, onlyValue=0.0 | |
| attribute | level | actual_range | byte | 0, 0 |
| attribute | level | axis | String | Z |
| attribute | level | ioos_category | String | Location |
| attribute | level | long_name | String | Altitude |
| attribute | level | positive | String | up |
| attribute | level | standard_name | String | altitude |
| attribute | level | units | String | m |
| dimension | y | float | nValues=10998, evenlySpaced=true, averageSpacing=1000.0 | |
| attribute | y | actual_range | float | -5498550.0, 5498450.0 |
| attribute | y | axis | String | Y |
| attribute | y | comment | String | y values are the centers of the grid cells |
| attribute | y | ioos_category | String | Location |
| attribute | y | long_name | String | y coordinate of projection |
| attribute | y | standard_name | String | projection_y_coordinate |
| attribute | y | units | String | m |
| dimension | x | float | nValues=10998, evenlySpaced=true, averageSpacing=1000.0 | |
| attribute | x | actual_range | float | -5498550.0, 5498450.0 |
| attribute | x | axis | String | X |
| attribute | x | comment | String | x values are the centers of the grid cells |
| attribute | x | ioos_category | String | Location |
| attribute | x | long_name | String | x coordinate of projection |
| attribute | x | standard_name | String | projection_x_coordinate |
| attribute | x | units | String | m |
| variable | NRCS | float | time, level, y, x | |
| attribute | NRCS | _FillValue | float | NaN |
| attribute | NRCS | comment | String | Values of sigma naught (sigma0) in dB |
| attribute | NRCS | ioos_category | String | Unknown |
| attribute | NRCS | long_name | String | Normalized Radar Cross Section |
| attribute | NRCS | missing_value | float | NaN |
| attribute | NRCS | short_name | String | NRCS Sigma0 (dB) |
| attribute | NRCS | standard_name | String | surface_backwards_scattering_coefficient_of_radar_wave |
| attribute | NRCS | units | String | 1 |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.