Name: Envisat ASAR Global Monitoring L1 [ASA_GM1_1P]
Creator: European Space Agency
License: https://earth.esa.int/eogateway/documents/20142/1564626/Terms-and-Conditions-for-the-use-of-ESA-Data.pdf

Envisat ASAR Global Monitoring L1  [ASA_GM1_1P]

Active Remote Sensing

ASAR

Imaging Radars

Envisat

Agriculture

Biosphere

Cryosphere

Land Surface

Oceans

Sea Ice

Soils

Terrestrial Hydrosphere

Topography

Vegetation

This product has been generated from Level 0 data collected when the instrument was in Global Monitoring Mode. One product covers a full orbit. The product includes slant range to ground range corrections.

This strip-line product is the standard for ASAR Global Monitoring Mode. It is processed to approximately 1 km resolution using the SPECAN algorithm. The swath width is approximately 400 km.

The ASAR GM L0 full mission data archive has been bulk processed to Level 1 (ASA_GM1_1P) in Envisat format with the IPF-ASAR processor Version 6.03.

Spatial Resolution: 1 km ground range x 1 km azimuth.

European Space Agency, 2021, Envisat ASAR Global Monitoring Mode L1 Product. IPF Version 6.03.

ASAR Auxiliary Data

ASAR Products Specification - Revision C

Envisat ASAR Sensor Performance, Products and Algorithms

Envisat ASAR Science and Applications

ASAR Product Handbook

ASAR Product Quality Disclaimer

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

The GEOSAT-2 Spain Coverage collection consists of imagery covering Spain, including the Balearic and Canary islands, acquired by GEOSAT-2 between March and November of 2021.

<figure class="centered-mobile-centered"><a data-lightbox="Spatial coverage of the 2021 collection." data-title="Spatial coverage of the 2021 collection." href="/documents/d/earth-online/spatial-coverage-of-the-2021-collection"><img alt="Spatial coverage of the 2021 collection." class="centered-mobile-centered" src="/documents/d/earth-online/spatial-coverage-of-the-2021-collection-tm" /> </a>

<figcaption><a href="/documents/d/earth-online/spatial-coverage-of-the-2021-collection">Spatial coverage of the 2021 collection.</a></figcaption>
</figure>

The available imagery have a geolocation accuracy of &lt; 4 m RMSE, a cloud cover percentage of &lt; 10 %, and were acquired at an off-nadir angle from -30° to 30°.&nbsp;

The following product types are available:

<ul>
	<li>Pan-sharpened: 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 1 m; Bands: All.</li>
</ul>

<ul>
	<li>Bundle: Panchromatic (1 m resolution) + Multispectral bands (4 m 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">
	<caption></caption>
	<tbody>
		<tr>
			<td class="eogtable-heading">Property</td>
			<td class="eogtable-heading">Spatial Resolution</td>
		</tr>
		<tr>
			<td>Pan-sharpened</td>
			<td>1.0 m</td>
		</tr>
		<tr>
			<td>Bundle (PAN + MS)</td>
			<td>1.0 m (PAN), 4.0 m (MS)</td>
		</tr>
	</tbody>
</table>

GEOSAT-2 Spain Coverage

The Dragon 6 Cooperation Call is now open, with a proposal submission deadline of 11 December 2023.

Announcement of Opportunity for Dragon 6

This collection is composed of a subset of ALOS-1 PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) OB1 L1C products from the <a href="https://earth.esa.int/eogateway/catalog/alos-prism-l1c">ALOS PRISM L1C collection</a> (DOI: 10.57780/AL1-ff3877f) which have been chosen so as to provide a cloud-free coverage over Europe. 70% of the scenes contained within the collection have a cloud cover percentage of 0%, while the remaining 30% of the scenes have a cloud cover percentage of no more than 20%.

The collection is composed of PSM_OB1_1C EO-SIP products, with the PRISM sensor operating in OB1 mode with three views (Nadir, Forward and Backward) at 35 km width.

ALOS PRISM L1C European Coverage Cloud Free

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

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