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Document - Newsletter
Earth Online Newsletter - 12 May 2023
This issue of the Earth Online Newsletter covers a selection of the latest news and events from ESA.
News - Success Stories
PROBA-V data improve surface albedo products in Africa
As ESA’s PROBA-V satellite marks its 10-year launch milestone, data tasked during the mission’s lifetime are still being used to assess changes in land cover.
News - Data Release news
PROBA-V ‘Collection 2’ - Reprocessed Dataset available
The improved PROBA-V data (Collection 2) has been released. Data is available via the PROBA-V MEP and Terrascope platforms so users can freely exploit the data using Virtual machines, Jupyter Notebooks, and the new viewing application.
Event - Conference
Living Planet Symposium 2022
Learn about the 2022 edition of ESA's Living Planet Symposium.
Data - Data Description
Proba-V 1Km, 333m, and 100m products
The Proba-V VEGETATION Raw products and Synthesis products ensure coverage of all significant landmasses worldwide with, in the case of a 10-day synthesis product, a minimum effect of cloud cover, resulting from selection of cloud-free acquisitions during the 10-day period. It ensures a daily coverage between Lat. 35°N and 75°N, and between 35°S and 56°S, and a full coverage every two days at equator. The VEGETATION instrument is pre-programmed with an indefinite repeated sequence of acquisitions. This nominal acquisition scenario allows a continuous series of identical products to be generated, aiming to map land cover and vegetation growth across the entire planet every two days. Level Synthesis Resolution resolution (m) Reflectance Level 1C n/a TOA Level 2A n/a 100 m TOA 333 m TOA 1 km TOA Level 3 S1 100 m TOA TOC TOC NDVI 333 m TOA TOC 1 km TOA TOC S5 100 m TOA TOC TOC NDVI S10 333 m TOC TOC NDVI 1 km TOC TOC NDVI Raw Products Overview Product Description L1C Level 1C segments (P – product): Radiometrically corrected Level 1B data, in raw sensor geometry (unprojected) Contains: - Top Of Atmosphere reflectance in the four spectral bands - Longitude/latitude information for every pixel - Geometric viewing conditions - Information on the status map (indicating missing and interpolated measurements). Format: HDF5 & GeoTiFF L2A Level 2A segment: projected Level1C (P–product) data, radiometrically and geometrically corrected. Contains: - TOA reflectance values in the four spectral bands without atmospheric correction being performed - Information on the status map (containing identification of radiometric quality, snow, ice, shadow, clouds, land/sea for every pixel) - Geometric viewing conditions Plate carrée projection (EPSG:4326) with spatial resolution of 100m, 333m and 1km Format: HDF5 & GeoTiFF Synthesis Products Overview Level 3 S1 = daily, S5 = 5 days, S10 = decade Different spatial resolution: 100m, 333m and 1km Divided into so called granules, each measuring 10 degrees x 10 degrees, each granule being delivered as a single file Plate carrée projection (EPSG:4326) Format: HDF5 & GeoTiFF Products Content TOA - Top Of Atmosphere reflectance in the four spectral bands (no atmospheric correction applied) - Normalized Difference Vegetation Index (NDVI) -Information on the composite status map (containing identification of snow, ice, shadow, clouds, land/sea for every pixel) - Geometric viewing conditions & date and time of selected measurement TOC Level 2A segment: projected Level1C (P–product) data, radiometrically and geometrically corrected. Contains: - Top Of Canopy (ground surface) reflectance in the four spectral bands, the atmospheric correction being performed using the SMAC (Simplified Method for Atmospheric Corrections) algorithm - Normalized Difference Vegetation Index (NDVI) - Information on the composite status map (containing identification of snow, ice, shadow, clouds, land/sea for every pixel) Normalized Difference Vegetation Index (NDVI) from Top Of Canopy product (SMAC algorithm for atmospheric corrections applied) - Geometric viewing conditions & date and time of selected measurement TOC NDVI Normalized Difference Vegetation Index (NDVI) from Top Of Canopy product (SMAC algorithm for atmospheric corrections applied)
Mission - Earth Watch
PROBA-V
The PROBA-V mission provides multispectral images to study the evolution of the vegetation cover on a daily and global basis.
Activity - Instrument characterisation and algorithm studies
ESA satellites and instruments calibration landing page
ESA satellites and instruments calibration landing page
Instrument - Imaging Spectrometers/Radiometers
Vegetation (VGT)
The main PROBA-V payload is the Vegetation sensor (VGT): a multispectral pushbroom spectrometer.
Event - Conference
Living Planet Symposium 2019
ESA's Living Planet Symposia are amongst the biggest Earth observation conferences in the world. Scientists present their latest findings on Earth's environment and climate.
Document - Newsletter
Earth-Online-Newsletter-Issue-10.pdf
This is the 10th issue of the Earth Online Newsletter for 2021, containing selected features from recent news.