ERS-1/2 SAR IM Precision L1  [SAR_IMP_1P]

Active Remote Sensing

AMI/SAR

Imaging Radars

ERS-1

ERS-2

Biosphere

Cryosphere

Land Surface

Oceans

Sea Ice

Snow and Ice

Terrestrial Hydrosphere

Topography

Vegetation

The SAR Precision product is a multi-look (speckle-reduced), ground range image acquired in Image Mode. This product type is most applicable to users interested in remote sensing applications, but is also suitable for calibration purposes. The products are calibrated and corrected for the SAR antenna pattern and range-spreading loss. Radar backscatter can be derived from the products for geophysical modelling, but no correction is applied for terrain-induced radiometric effects. The images are not geocoded, and terrain distortion (foreshortening and layover) has not been removed.

The numbering sequence relates to the satellite position and therefore differs between Ascending and Descending scenes.

Product characteristics:

<ul>
	<li>Pixel size: 12.5 m (range - across track) x 12.5 m (azimuth - along track)</li>
	<li>Scene area: 100 km (range) x at least 102.5 km (azimuth)</li>
	<li>Scene size: 8000 pixels range x at least 8200 lines (azimuth)</li>
	<li>Pixel depth: 16 bits unsigned integer</li>
	<li>Total product volume: 125 MB</li>
	<li>Projection: Ground-range</li>
	<li>Number of looks: 3</li>
</ul>

ERS SAR auxiliary data

ERS SAR Envisat Format Product Specification

ERS SAR Sensor Performance, Products and Algorithms

Sentinel-1 Toolbox / Sentinel Application Platform (SNAP)

Derivation of Backscattering Coefficient Sigma 0 in ESA ERS SAR PRI Products

Review of the impact of the ERS-2 Piloting Modes on the SAR Doppler Stability

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Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions

The FSSCat collection provides hyperspectral data coverage over a number of locations around the world, as measured by the HyperScout 2 sensor.

The FSSCat hyperspectral data products are comprised of 50 spectral bands, covering a spectral range of 450 – 950 nm with a spectral resolution of 18 nm (at FWHM). Imagery is available with an along-track ground sampling distance (GSD) of 75 m. To ensure a high degree of radiometric accuracy, HyperScout 2 data are validated through comparison with Sentinel-2 data products.

The processing level of the data is L1C – calibrated top-of-atmosphere radiance, reflectance or brightness temperature. The raster type of the L1C data product is a GRID – a 2D or 3D raster where the (geo)location of the data is uniquely defined by the upper left pixel location of the raster and the pixel size of the raster, and the projection parameters of the raster (if georeferenced). The third dimension can e.g. be a spectral or third spatial dimension.

The L-1C VNIR data product includes a hyperspectral cube of TOA reflectance in the VNIR range, as well as relevant meta-data that adheres to EDAP's best practice guidelines. This product consists of georeferenced and ortho-rectified image tiles that contain spectral reflectance data at the top-of-the-atmosphere. Each image tile contains radiometrically corrected and ortho-rectified band images that are projected onto a map, as well as geolocation information and the coordinate system used. Additionally, each image pixel provides TOA spectral reflectance data in scaled integers, conversion coefficients for spectral radiance units, viewing and solar zenith and azimuth angles, and quality flags.

FSSCat products

In cooperation with CONAE (Comisión Nacional de Actividades Espaciales), ESA is launching an Announcement of Opportunity for the international scientific community to access data from the SAOCOM mission for science and EO-based applications development.

Announcement of Opportunity for SAOCOM

GEOSAT-2 Portugal coverage is a collection of 2021 data over the Portugal area, including islands. The available dataset has a cloud cover less than 10%, and is acquired up to 1m resolution with Geometric accuracy &lt;6m CE90 based on Copernicus DEM @10m.

<figure class="centered-mobile-centered"><a data-lightbox="GEOSAT-2-Portugal" data-title="GEOSAT-2 Portugal 2021 - Spatial Coverage of the Dataset" href="/documents/20142/4279060/GEOSAT2_Portugal_Coverage.png"><img alt="GEOSAT-2 Portugal 2021 - Spatial Coverage of the Dataset" src="/documents/20142/4279060/GEOSAT2_Portugal_Coverage_Smaller.jpg/3e2c84ea-17e7-c8b6-ed57-b079e1851142?t=1677155961453&amp;download=true" style="margin: 10px;" /></a>

<figcaption style="text-align: center;">GEOSAT-2 Portugal 2021 - Spatial Coverage of the Dataset</figcaption>
</figure>

The following product types are available:

<ul>
	<li>Pan-sharpened (4 bands, 321 Natural Colours or 432 False Colours): A four-band image, resulting from adding the information of each multispectral band to the panchromatic band. The fusion does not preserves all spectral features of the multispectral bands, so it should not be used for radiometric purposes. Resolution 1m; Bands: All, R-G-B or Ni-R-G</li>
	<li>Bundle: Panchromatic (1m resolution) + Multispectral bands (4m resolution): five-band image containing the panchromatic and multispectral products packaged together, with band co-registration.</li>
</ul>

The available processing level is L1C orthorectified: a calibrated and radiometrically corrected product, manually orthorectified and resampled to a map grid.

<table class="eogtable">
	<tbody>
		<tr class="eogtable-heading">
			<td rowspan="2">Product Type</td>
			<td colspan="2">Processing Level and Spatial Resolution</td>
		</tr>
		<tr class="eogtable-heading">
			<td>L1B (native)</td>
			<td>L1C (ortho)</td>
		</tr>
		<tr>
			<td>Pan-sharpened</td>
			<td>1.0m</td>
			<td>1.0m</td>
		</tr>
		<tr>
			<td>Bundle (PAN+MS)</td>
			<td>1.0m (P), 4.0m (MS)</td>
			<td>1.0m (P), 4.0m(MS)</td>
		</tr>
	</tbody>
</table>

GEOSAT-2 Portugal Coverage 2021

A large number of European cities are covered by this dataset; for each city you can find one or more Cartosat-1 ortho image products and one or more Euro-Maps 3D DSM tiles clipped to the extent of the ortho coverage.

The Euro-Maps 3D DSM is a homogeneous, 5 m spaced Digital Surface Model semi-automatically derived from 2.5 m Cartosat-1 in-flight stereo data with a vertical accuracy of 10 m. The very detailed and accurate representation of the surface is achieved by using a sophisticated and well adapted algorithm implemented on the basis of the Semi-Global Matching approach. The final product includes several pixel-based quality and traceability layers:

<ul>
	<li>The dsm layer (*_dsm.tif) contains the elevation heights as a geocoded raster file</li>
	<li>The source layer (*_src.tif) contains information about the data source for each height value/pixel</li>
	<li>The number layer (*_num.tif) contains for each height value/pixel the number of IRS-P5 Cartosat-1 stereo pairs used for the generation of the DEM</li>
	<li>The quality layer (*_qc.tif) is set to 1 for each height/pixel value derived from IRS-P5 Cartosat-1 data and which meets or exceeds the product specifications</li>
	<li>The accuracy vertical layer (*_acv.tif) contains the absolute vertical accuracy for each quality controlled height value/pixel.</li>
</ul>

The ortho image is a Panchromatic image at 2.5 m resolution. The following table defines the offered product types.

<table class="eogtable">
	<tbody>
		<tr class="eogtable-heading">
			<td>EO-SIP product type</td>
			<td>Description</td>
		</tr>
		<tr>
			<td>PAN_PAM_3O</td>
			<td>IRS-P5 Cartosat-1 ortho image</td>
		</tr>
		<tr>
			<td>DSM_DEM_3D</td>
			<td>IRS-P5 Cartosat-1 DSM</td>
		</tr>
	</tbody>
</table>

European Cities: Cartosat-1 Euro-Maps 3D

The Atmospheric Carbon-dioxide Grating Spectrometer (ACGS) instrument is pushbroom spectrometer operating in NIR and SWIR bands which allows the measuring of CO2 mole fraction.

The available ACGS products have a temporal coverage between March 2017 and January 2020 (not all days included in the time frame):

<ul>
	<li>L1A DS: Sample Dark Calibration sample product</li>
	<li>L1A GL: Sample Glint Sample products</li>
	<li>L1A LS: Sample Lamp Calibration sample product</li>
	<li>L1A ND: Principal-Plane Nadir Sample product</li>
	<li>L1A ZS: Sample Z-Axis Solar Calibration Sample</li>
	<li>L1B CAL DS: Sample Dark Calibration product</li>
	<li>L1B CAL LS: Sample Lamp Calibration product</li>
	<li>L1B CAL ZS: Sample Z-Axis Solar Calibration product</li>
	<li>L1B SCI GL: Sample Glint Science product</li>
	<li>L1B SCI ND: Principal-Plane Nadir Science product.</li>
</ul>

 

The Cloud Aerosol Polarization Imager (CAPI) is a pushbroom radiometer in VIS, NIR and SWIR bands for the observation of aerosols and clouds optical properties.

The CAPI products are available in a time range from July 2019 and January 2020 (not all days included in the time frame):

<ul>
	<li>L1A ND: Principal-Plane Nadir product</li>
	<li>L1B ND 1000M: Principal-Plane Nadir products at 1000 m resolution (1375 nm, 1640 nm)</li>
	<li>L1B ND 250M: Principal-Plane Nadir products at 250 m resolution (380 nm, 670 nm, 870 nm)</li>
	<li>L1B ND GEOQK: Principal-Plane Nadir georeferenced at 250 m resolution</li>
	<li>L1B ND GEO1K: Principal-Plane Nadir georeferenced at 1000 m resolution</li>
	<li>L1B ND OBC: Principal-Plane Nadir on-board calibrator product</li>
	<li>L2 ND CLM: Principal-Plane Nadir cloud flag product.</li>
</ul>

TanSat AGCS and CAPI products

Daniel Heywood

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Earth Observation Satellite

TOPEX/POSEIDON

Joint Polar Satellite System - 2 planned for 2022

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Joint Polar Satellite System - 3 planned for 2026

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Joint Polar Satellite System - 4 planned for 2031

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FY-3B

Nimbus-4

CloudSat

Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations

CALIPSO

GOSAT-2

GOSAT (Greenhouse gases Observing Satellite) is a JAXA (Japan Aerospace Exploration Agency) mission within the GCOM (Global Change Observation Mission) program of Japan. The GOSAT mission goals call for the study of the transport mechanisms of greenhouse gases such as carbon dioxide (CO2) and methane (CH4).

GOSAT-1

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A Fast Registration request must be submitted to access these data collections. Following user authentication, access to the data are provided within two working days.

Fast Registration with approval (Restrained)

Data Access Type FedEO

Procedures requiring evaluation

Access to these data collections are provided through services external to ESA. Learn more about access conditions on the data providers’ websites.

External Data (Restrained)

A Fast Registration request must be submitted to access these data collections. Access is provided as soon as the request is submitted.

Fast Registration with immediate access (Open)

These data collections are free and open to access for anyone with an active account in ESA’s EO Sign In system.

EO Sign In Authentication (Open)

Access to these data collections is free and open to everyone.

Open access (Open)

A Project Proposal must be submitted to access these Third Party Mission data collections, describing the proposed use of the data and the team involved in the project.

Project Proposal (Restrained)

Data Service Requests must be submitted to access ERS-1/2 and Envisat (A)SAR level zero data.

ERS-1/2 SAR IM Precision L1 [SAR_IMP_1P]

ERS-1/2 SAR IM Precision Image Product

How To Access Data

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DATA SET SPECIFICATIONS

PROCESSING LEVEL

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