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Release of the TanDEM-X PolarDEM 90m of Antarctica

Posted on Dec 14, 2020 by Administrator

The TanDEM-X PolarDEM 90m of Antarctica is a gap-free and edited version of the TanDEM-X digital elevation model (DEM) provided in Antarctic Polar Stereographic projection (EPSG:3031) with a pixel spacing of 90 meters. The editing process comprises a smoothing of noisy areas, a gap-filling with new TanDEM-X acquisitions and a replacement of frozen and partially open sea-ice areas with geoidal undulations. The majority of the data were acquired between April 2013 to September 2014. The TanDEM-X PolarDEM is a project developed by the German Remote Sensing Data Center (DFD) at the German Aerospace Center (DLR) within the activities of the TanDEM-X mission. It is a framework for the provision of derivatives of the global Digital Elevation Model (DEM) of the TanDEM-X mission for Polar Regions [1]. The dataset can be visualized in the EOC Geoservice Webapp [2] and after registration, also be downloaded from the EOC Download Service [3].

Release of the TimeScan Landsat product

Posted on Nov 4, 2020 by Administrator

The TimeScan Landsat 2015 layer [1, 2] is a higher-processing level baseline product providing a harmonized representation of the spectral and temporal properties of the land surface. The global TimeScan Landsat 2015 dataset was derived from over 450,000 Landsat-8 images (~500TB) collected from 2013 to 2015. The product condenses the information content of the original images to a 20th of their original size. The TimeScan Landsat 2015 layer can be analyzed in the form of a single, global, cloud-free dataset based on statistical ranges of 6 indices for such aspects as the state of vegetation, water cover, or human settlement (built-up areas). For each of the recorded indices the statistics provide the minimal, maximal and mean values along with the standard deviation and the mean slope determined for the entire period from 2013 to 2015. The TimeScan procedure is designed to help end users exploit information from masses of data that until now were too unwieldy for them to handle.

Release of MetOp-C GOME-2 map composites

Posted on May 27, 2020 by Administrator

The EOC Geoservice map context "MetOp GOME-2 Daily Total Column Composites" [1] shows composites calculated from daily products of different trace gases and cloud properties measured by the "Global Ozone Monitoring Experiment-2" (GOME-2) instruments onboard EUMETSAT's MetOp satellite series. The products data stream has now been accomplished by EUMETSAT's MetOp-C satellite unit which was launched in November 2018 and secures the future data flow at least until the year 2025. Please see the according news release [2] for further information.

In addition to the introduction of MetOp-C, the following changes have been performed to the MetOp GOME-2 WMS/WCS services:

  • The publication of MetOp-A maps in the Geoservice ended on 2020-04-07 and is superseded by MetOp-C.
  • The publication of MetOp-AB maps (combined composite products of MetOp-A and MetOp-B) ended on 2020-04-07 and is superseded by combined products using data from MetOp-B and MetOp-C. The existing older MetOp-AB and new MetOp-BC products are now available in a new "Combined" map layer as a continuous time-series.
  • NRT-products are no longer available as separate "LATEST/PREVIOUS"-layers, but are now included in the regular layers of the Daily ("P1D") products.

The new layer names and titles are defined using the following schema:

MetOp-B/C GOME-2:
Layer Title: MetOp-[B/C] GOME-2 L2C Daily [PARAMETER]

MetOp GOME-2 Combined:
Layer Title: MetOp GOME-2 L2C Daily [PARAMETER] Combined

The collections can be visualized in the EOC Geoservice Webapp [1] and accessed via OGC web services [3] [4].

Release of Sentinel-2 L2A and L3A MAJA/WASP data

Posted on Nov 19, 2019 by Administrator

Two new Sentinel-2 collections have been published in the EOC Geoservice: Sentinel-2 L2A MAJA and Sentinel-2 L3 MAJA/WASP data. The L2A dataset contains surface reflectances which are computed for the country of Germany using the time-series based MAJA processor. During the Level 2A processing, the data are corrected for atmospheric effects and clouds and their shadows are detected. The collection can be visualized in the EOC Geoservice Webapp [1] and individual tiles can be downloaded via the EOC Download Service [2]. The Sentinel-2 L3 MAJA/WASP product contains synthesized monthly Sentinel-2 Level 3A surface reflectances for Germany computed by the WASP processor. For the processing, WASP utilizes L2A products derived from the MAJA processor. During the Level 3A processing, atmospherically corrected data from a predefined time interval are collected, weighted based on temporal distance and integrated to a new data set with the aim of removing clouds. The Sentinel-2 L3 products can be visualized in the EOC Geoservice Webapp [3]. Both collections can also be accessed via OGC web services [4, 5].

Global TanDEM-X forest map released

Posted on May 13, 2019 by Administrator

A new product has been released in the EOC Geoservice and EOC Download Service: The TanDEM-X Forest/Non-Forest Map (FNF). The map has been generated by processing and mosaicking more than 500,000 TanDEM-X bistatic images acquired from 2011 until 2015. Forested and non-forested areas are depicted in green and white, respectively. Water bodies are depicted in blue and black is used for identifying urban areas and invalid pixels.

New EOC Download Service available

Posted on Sep 26, 2018 by Administrator

Concurrent with the publication of the TanDEM-X 90m digital elevation model (DEM), the new EOC Download Service has been introduced. Using the new service, raster data provided by the EOC Geoservice can be downloaded with just a few mouse clicks through an easy-to-use webinterface. Besides the TanDEM-X 90m DEM [1], also SRTM X-SAR elevation data [2] are made available with the initial release of the new service. Further datasets will follow.

TanDEM-X 90m Digital Elevation Model released

Posted on Sep 26, 2018 by Administrator

On 28 September 2018, DLR has released the global elevation model of the TanDEM-X mission in 90 meter resolution to the public. After registration, the data set can be downloaded free of charge from DLR EOC's new download service [1]. In addition, the eight original TanDEM-X information layers are provided via OGC web services [2, 3] and can be visualized in the EOC Geoservice Webapp [4].

Sentinel-5P TROPOMI L3 Composites released

Posted on Jul 6, 2018 by Administrator

The TROPOMI instrument is a space-borne, nadir-viewing, imaging spectrometer covering wavelength bands between the ultraviolet and the shortwave infra-red. TROPOMI is the single payload of the SENTINEL-5P spacecraft, the purpose of which is to measure atmospheric properties and constituents. The instrument uses passive remote sensing techniques to attain its objective by measuring at the Top Of Atmosphere (TOA) the solar radiation reflected by and radiated from the earth. TROPOMI can measure a range of atmospheric trace constituents, as well as cloud properties. These data are crucial for monitoring the atmospheric composition and the detection of pollutants. The German Aerospace Center (DLR) is responsible for the payload ground segment of the Sentinel-5P mission and together with the Royal Netherlands Meteorological Institute (KNMI) also engaged in the processing and analysis of the satellite data. The TROPOMI measurement data go through a highly complex processing chain: The raw measurements are received by the ground stations and transmitted to DLR. There they are analyzed, filtered, processed into individual data products and automatically made available on a web server. The processing system was developed by the Remote Sensing Technology Institute (IMF) of DLR and KNMI. DLR operates the processors and ensures that the partly interlinked work steps are running smoothly.

Extended Timeseries Support

Posted on May 9, 2018 by Administrator

The EOC Geoservice now supports requesting timeseries for all temporal enabled layers via the GeoServer ncWMS extension [1], [2]. Additionally, the map pages now include basic support for the GeoTimeSeries operation and plotting of interactive timeseries graphs. It can be activated by double-clicking on the map. This will request a graph representing the latest 30 days for daily layers and latest 12 months for monthly layers. Together with the already supported animation capabilities of GeoServer [3], users now have more advanced possibilities to visualise temporal datasets [4].

AVHRR - Monthly Mediterranean Sea Surface Temperature (SST)

Posted on May 9, 2018 by Administrator

D-SDA has been archiving data of the Advanced Very High Resolution Radiometer (AVHRR) on board of the National Oceanic and Atmospheric Administration (NOAA) fleet of Polar Operational Environmental Satellites (POES) since 1983. For three decades DLR has been generating and archiving regional coverages of daily AVHRR level 3 products such as vegetation index, sea surface temperature and land surface temperature. D-SDA is now making available a subset of its AVHRR level 3 data archive via geospatial web services provided by the EOC Geoservice. "AVHRR - Monthly Mediterranean SST" is an AVHRR subset from 1993 to 2014 integrated in the EOC Geoservice to facilitate valuable time series exploitation of historic data. Additionally, integrating these data serves as a prototype for the DLR "TIMELINE" project.