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Sentinel 1A C-band Synthetic Aperture Radar (SAR): Extra Wide (EW) mode Ground Range Detected (GRD) Medium Resolution (MR) Level 1 data

Update Frequency: As Needed
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-06-14
Download Stats: last 12 months


This dataset contains Extra Wide swath (EW) Ground Range Detected (GRD) Medium Resolution (MR) C-band Synthetic Aperture Radar (SAR) data from the European Space Agency (ESA) Sentinel 1A satellite. Sentinel 1A was launched on 3rd April 2014 and provides continuous all-weather, day and night imaging radar data. The EW mode is primarily used for wide area coastal monitoring. The EW mode supports single (HH or VV) and dual (HH+HV or VV+VH) polarisation. These data are available via CEDA to any registered scientific user in the UK.

Citable as:  Copernicus; European Space Agency (2015): Sentinel 1A C-band Synthetic Aperture Radar (SAR): Extra Wide (EW) mode Ground Range Detected (GRD) Medium Resolution (MR) Level 1 data. Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: Sentinel, radar, Synthetic Aperture Radar, SAR, Extra Wide, EW, Ground Range Detected, GRD


Previous Info:
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Previously used record identifiers:
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Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data collected and prepared by European Space Agency (ESA). Downloaded from the Collaborative Hub for use by the UK scientific community.

Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA).
File Format:
Image data files are in a binary format. Quicklook images are in png format. Manifest files with relevant metadata are in SAFE format.

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Instrument/Platform pairings

Sentinel 1 Synthetic Aperture Radar (SAR) Deployed on: Sentinel 1A

Computation Element: 1

Title Level 1 processing algorithm applied to Sentinel 1 raw data, Instrument Processing Facility (IPF) v2
Abstract This computation involves the Level 1 processing algorithm applied to raw Synthetic Aperture Radar (SAR) data. This consists of Level 1 preprocessing, special handling for TOPSAR mode, Doppler centroid estimation, Level 1 Single Look Complex (SLC) processing algorithms and Level 1 post-processing to generate the output Single Look Complex (SLC) and Ground Range Detected (GRD) products as well as quicklook images. Level-1 Single Look Complex (SLC) products consist of focused SAR data, geo-referenced using orbit and attitude data from the satellite, and provided in slant-range geometry. Slant range is the natural radar range observation coordinate, defined as the line-of-sight from the radar to each reflecting object. The products are in zero-Doppler orientation where each row of pixels represents points along a line perpendicular to the sub-satellite track. The products include a single look in each dimension using the full available signal bandwidth and complex samples (real and imaginary) preserving the phase information. The products have been geo-referenced using the orbit and attitude data from the satellite and have been corrected for azimuth bi-static delay, elevation antenna pattern and range spreading loss. For more information on the changes for this processing version please see the Sentinel 1 document libary under the docs tab.
Input Description None
Output Description None
Software Reference None
Output Description None
  • long_name: Radar
  • gcmd_url:
  • gcmd_keyword: EARTH SCIENCE > Spectral/Engineering > Radar
  • names: EARTH SCIENCE > Spectral/Engineering > Radar,
  • long_name: Radar Imagery
  • gcmd_url:
  • gcmd_keyword: Radar Imagery
  • names:, Radar Imagery

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