Objectives and Applications
Sentinel-1 provides continuity of C-band SAR data for operational applications notably in the following areas: monitoring of sea ice zones and the arctic environment, surveillance of marine environment, monitoring of land surface motion risks and mapping in support of humanitarian aid in crisis situations.
Full Name
Sentinel-1 C
aka S1C
Mission Status
Commissioning
Mission Agencies
Launch Date
05 Dec 2024
Mission Links
EOL Date
Apr 2034
Orbit Type
Sun-synchronous
Orbit Period
98.74 minutes
Orbit Sense
Ascending
Orbit Inclination
98.19 deg
Orbit Altitude
693 km
Orbit Longitude
Orbit LST
18:00
Repeat Cycle
12 days
NORAD Catalog #
International Designator
AIS - Automatic Identification System |
| C-Band SAR - C-Band Synthetic Aperture Radar |
L0 RAW
Jan-2024 | The SAR Level-0 products consist of compressed and unfocused SAR raw data. Level-0 products are the basis from which all other high level products are produced. Level-0 data is compressed using Flexible Dynamic Block Adaptive Quantization (FDBAQ) which provides a variable bit rate coding that increases the number of bits allocated to bright scatterers. For the data to be usable, it will need to be decompressed and processed using focusing software. Level-0 data includes noise, internal calibration and echo source packets as well as orbit and attitude information. - Read more |
L1 SLC
Jan-2024 | 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. SM SLCs contain one image per polarisation for its single swath. IW, having three sub-swaths, has three images in single polarisation and six images for dual polarisation. EW, having five sub-swaths, has five images for single polarisation and ten images for dual polarisation products. - Read more |
L1 GRD
Jan-2024 | Level-1 Ground Range Detected (GRD) products consist of focused SAR data that has been detected, multi-looked and projected to ground range using the Earth ellipsoid model WGS84. The ellipsoid projection of the GRD products is corrected using the terrain height specified in the product general annotation. The terrain height used varies in azimuth but is constant in range (For IW/EW modes only the terrain height of first subswath is considered). Ground range coordinates are the slant range coordinates projected onto the ellipsoid of the Earth. Pixel values represent detected amplitude. Phase information is lost. The resulting product has approximately square resolution pixels and square pixel spacing with reduced speckle at a cost of reduced spatial resolution. - Read more |
L2 OCN
Jan-2024 | Level-2 consists of geolocated geophysical products derived from Level-1. Level-2 Ocean products for wind, wave and currents applications may contain the following geophysical components derived from the SAR data: Ocean Wind field, Ocean Swell spectra, Surface Radial Velocity. - Read more |
Biomass CCI AGB 2017
Dec-2019 | This dataset comprises estimates of forest above-ground biomass for the year 2017. The data has been produced as part of the European Space Agency's (ESA's) Climate Change Initiative (CCI) programme by the Biomass CCI team.
The data was derived from input data from the PALSAR-2 instrument on the ALOS-2 satellite, and data from the Sentinel-1 satellite. The ALOS-2 PALSAR-2 dataset was obtained from the Japanese Aerospace Exploration Agency (JAXA) in the form of a mosaic of images acquired in 2017. The Sentinel-1 dataset consisted of individual data takes by the 1A and 1B units during 2017 and provided by the European Space Agency.
- Read more |
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