Bulk processing of the Landsat MSS/TM/ETM+ archive of the European Space Agency: an insight into the level 1 MSS processing

2017 ◽  
Author(s):  
Amy Northrop ◽  
Luca Galli ◽  
Riccardo Ferrara ◽  
Stefano Mica ◽  
Samatha Lavender ◽  
...  
Keyword(s):  
European Space Agency ◽  
Space Agency ◽  
Level 1 ◽  
Bulk Processing ◽  
Insight Into

scholarly journals OLCI A/B Tandem Phase Analysis, Part 1: Level 1 Homogenisation and Harmonisation

2020 ◽  
Vol 12 (11) ◽  
pp. 1804 ◽  
Author(s):  
Nicolas Lamquin ◽  
Sébastien Clerc ◽  
Ludovic Bourg ◽  
Craig Donlon
Keyword(s):  
European Space Agency ◽  
Companion Paper ◽  
The Other ◽  
Satellite Mission ◽  
Space Agency ◽  
The Future ◽  
Level 1 ◽  
Level 2 ◽  
Very High ◽  
Sentinel 2

Copernicus is a European system for monitoring the Earth in support of European policy. It includes the Sentinel-3 satellite mission which provides reliable and up-to-date measurements of the ocean, atmosphere, cryosphere, and land. To fulfil mission requirements, two Sentinel-3 satellites are required on-orbit at the same time to meet revisit and coverage requirements in support of Copernicus Services. The inter-unit consistency is critical for the mission as more S3 platforms are planned in the future. A few weeks after its launch in April 2018, the Sentinel-3B satellite was manoeuvred into a tandem configuration with its operational twin Sentinel-3A already in orbit. Both satellites were flown only thirty seconds apart on the same orbit ground track to optimise cross-comparisons. This tandem phase lasted from early June to mid October 2018 and was followed by a short drift phase during which the Sentinel-3B satellite was progressively moved to a specific orbit phasing of 140° separation from the sentinel-3A satellite. In this paper, an output of the European Space Agency (ESA) Sentinel-3 Tandem for Climate study (S3TC), we provide a full methodology for the homogenisation and harmonisation of the two Ocean and Land Colour Instruments (OLCI) based on the tandem phase. Homogenisation adjusts for unavoidable slight spatial and spectral differences between the two sensors and provide a basis for the comparison of the radiometry. Persistent radiometric biases of 1–2% across the OLCI spectrum are found with very high confidence. Harmonisation then consists of adjusting one instrument on the other based on these findings. Validation of the approach shows that such harmonisation then procures an excellent radiometric alignment. Performed on L1 calibrated radiances, the benefits of harmonisation are fully appreciated on Level 2 products as reported in a companion paper. Whereas our methodology aligns one sensor to behave radiometrically as the other, discussions consider the choice of the reference to be used within the operational framework. Further exploitation of the measurements indeed provides evidence of the need to perform flat-fielding on both payloads, prior to any harmonisation. Such flat-fielding notably removes inter-camera differences in the harmonisation coefficients. We conclude on the extreme usefulness of performing a tandem phase for the OLCI mission continuity as well as for any optical mission to which the methodology presented in this paper applies (e.g., Sentinel-2). To maintain the climate record, it is highly recommended that the future Sentinel-3C and Sentinel-3D satellites perform tandem flights when injected into the Sentinel-3 time series.

European Space Agency (ESA) Landsat MSS/TM/ETM+ Archive Bulk-Processing: processor improvements and data quality

2014 ◽  
Author(s):  
F. Gascon ◽  
R. Biasutti ◽  
R. Ferrara ◽  
P. Fischer ◽  
L. Galli ◽  
...  
Keyword(s):  
Data Quality ◽  
European Space Agency ◽  
Space Agency ◽  
Bulk Processing

Bulk processing of the Landsat MSS/TM/ETM+ archive of the European Space Agency

2015 ◽  
Author(s):  
F. Gascon ◽  
R. Biasutti ◽  
R. Ferrara ◽  
P. Fischer ◽  
L. Galli ◽  
...  
Keyword(s):  
European Space Agency ◽  
Space Agency ◽  
Bulk Processing

The Energetic Particle Detector (EPD) Electron-Proton Telescope (EPT) on Solar Orbiter: First Data

2021 ◽  
Author(s):  
Alexander Kollhoff ◽  
Daniel Pacheco ◽  
Robert F. Wimmer-Schweingruber ◽  
Johan von Forstner ◽  
Lars Berger ◽  
...  
Keyword(s):  
Energetic Particle ◽  
European Space Agency ◽  
Particle Energy ◽  
Current Status ◽  
Particle Detector ◽  
Solar Particle Events ◽  
Space Agency ◽  
Electrons And Ions ◽  
Low Activity ◽  
Insight Into

<p>Solar Orbiter’s Energetic Particle Detector (EPD) was commissioned in early 2020 and has since been returning data from the inner heliosphere. Despite the low activity in the current deep and extended solar minimum, EPD has observed a number of solar particle events and numerous other enhancements of energetic particles. As one of the four complementary EPD sensors, the Electron-Proton Telescope (EPT) covers the gap between the high and low particle-energy measurements of HET and STEP. With four double-ended telescopes, EPT is capable of measuring electrons and ions in an energy range of 35-400keV and 45-7000keV respectively, while providing anisotropy information from four different viewing directions.</p><p>We will present a first overview of EPT measurements, exhibiting some of the EPT data products which are made available by the European Space Agency (ESA).</p><p>In order to provide the community a deep insight into the data, we will go through different aspects of the measurements, including the current status of the intercalibration with the other EPD instruments.</p>

scholarly journals Comparison of the inversion algorithms applied to the ozone vertical profile retrieval from SCIAMACHY limb measurements

2007 ◽  
Vol 7 (18) ◽  
pp. 4763-4779 ◽  
Author(s):  
A. Rozanov ◽  
K.-U. Eichmann ◽  
C. von Savigny ◽  
H. Bovensmann ◽  
J. P. Burrows ◽  
...  
Keyword(s):  
Lower Stratosphere ◽  
European Space Agency ◽  
Air Masses ◽  
Upper Troposphere ◽  
Space Agency ◽  
Lidar Measurements ◽  
Retrieval Problem ◽  
Level 1 ◽  
Ground Based Lidar ◽  
Middle Stratosphere

Abstract. This paper is devoted to an intercomparison of ozone vertical profiles retrieved from the measurements of scattered solar radiation performed by the SCIAMACHY instrument in the limb viewing geometry. Three different inversion algorithms including the prototype of the operational Level 1 to 2 processor to be operated by the European Space Agency are considered. Unlike usual validation studies, this comparison removes the uncertainties arising when comparing measurements made by different instruments probing slightly different air masses and focuses on the uncertainties specific to the modeling-retrieval problem only. The intercomparison was performed for 5 selected orbits of SCIAMACHY showing a good overall agreement of the results in the middle stratosphere, whereas considerable discrepancies were identified in the lower stratosphere and upper troposphere altitude region. Additionally, comparisons with ground-based lidar measurements are shown for selected profiles demonstrating an overall correctness of the retrievals.

scholarly journals Comparison of the inversion algorithms applied to the ozone vertical profile retrieval from SCIAMACHY limb measurements

2007 ◽  
Vol 7 (1) ◽  
pp. 1969-1993
Author(s):  
A. Rozanov ◽  
K.-U. Eichmann ◽  
C. von Savigny ◽  
H. Bovensmann ◽  
J. P. Burrows ◽  
...  
Keyword(s):  
Lower Stratosphere ◽  
European Space Agency ◽  
Vertical Profiles ◽  
Upper Troposphere ◽  
Operational Level ◽  
Space Agency ◽  
Lidar Measurements ◽  
Level 1 ◽  
Ground Based Lidar ◽  
Middle Stratosphere

Abstract. This paper is devoted to an intercomparison of ozone vertical profiles retrieved from the measurements of scattered solar radiation performed by the SCIAMACHY instrument in the limb viewing geometry. Three different inversion algorithms including the prototype of the operational Level 1 to 2 processor to be operated by the European Space Agency are considered. The intercomparison was performed for 5 selected orbits of SCIAMACHY showing a good overall agreement of the results in the middle stratosphere, whereas considerable discrepancies were identified in the lower stratosphere and upper troposphere altitude region. Additionally, comparisons with ground-based lidar measurements are shown for selected profiles demonstrating an overall correctness of the retrievals.

KLASIFIKASI SAWAH DAN NON-SAWAH DENGAN METODE RANDOM FOREST PADA CITRA SAR SENTINEL-1 (Studi Kasus di Kecamatan Kediri, Kabupaten Tabanan, Bali)

2021 ◽  
pp. 245
Author(s):  
I Made Oka Guna Antara ◽  
Tati Budi Kusmiyarti ◽  
R. Suyarto ◽  
Wiyanti Wiyanti
Keyword(s):  
Random Forest ◽  
Synthetic Aperture Radar ◽  
European Space Agency ◽  
Training Data ◽  
Synthetic Aperture ◽  
Space Agency ◽  
Level 1 ◽  
Aperture Radar

Pemanfaatan teknologi penginderaan jauh dalam bidang pemetaan telah lama dikenal. Data penginderaan jauh menjadi salah satu sumber data untuk pemetaan, yang memberikan informasi rupa bumi, seperti Kawasan pemukiman, Kawasan hutan, Kawasan pertanian dan lain sebagainya. Salah satu jenis data penginderaan jauh adalah citra Synthetic Aperture Radar (SAR), SAR memancarkan gelombang elektromagnetik untuk mendapatkan informasi dari target/rupa bumi. Citra SAR memiliki kelebihan tidak terpengaruh awan, cuaca (hujan dengan intensitas ringan), dan dapat bekerja sepanjang hari serta malam, dibandingkan dengan citra optik. Citra SAR dengan metode komposit RGB dual polarimetric multiple menggunakan aplikasi SNAP Toolbox dari European Space Agency (ESA) dapat dimanfaatkan untuk membedakan lokasi persawahan dengan bukan sawah, perbedaan backscatter atau nilai reflektan digunakan untuk mengetahuinya. Penelitian lebih lanjut menggunakan metode klasifikasi non parametrik Random Forest, dengan membuat kelas menjadi 2, yaitu sawah dan non sawah, ke-2 kelas digunakan sebagai training data untuk metode tersebut. Data yang digunakan adalah citra satelit Sentinel-1 pada tanggal 30 Maret 2020 dengan mode IW Level-1 GRD Ascending direction beresolusi 20x22 m dan polarisasi ganda (VH dan VV) di Kecamatan Kediri, Kabupaten Tabanan, Provinsi Bali. Dari hasil penelitian diperoleh akurasi 96,90%.

Validation of the EarthCARE Mission

2020 ◽  
Author(s):  
Rob Koopman ◽  
Alain Lefebvre ◽  
Damien Maeusli ◽  
Tobias Wehr ◽  
Michael Eisinger ◽  
...  
Keyword(s):  
Peer Review ◽  
European Space Agency ◽  
Implementation Plan ◽  
Principal Investigators ◽  
Space Agency ◽  
Validation Plan ◽  
Level 1 ◽  
Japan Aerospace Exploration Agency ◽  
Scientific Validation ◽  
Level 2

<p>This poster will address the geophysical validation for EarthCARE. This mission is developed by the European Space Agency (ESA) in cooperation with the Japan Aerospace eXploration Agency (JAXA); both space agencies also agreed to define and coordinate a joint EarthCARE Validation programme. Beside providing the Cloud Profile Radar instrument and making available the related ground processing facilities, JAXA is as well responsible for the commissioning of the CPR, including the associated Validation Plan and activities. ESA will then integrate the CPR Validation Plan part into the joint EarthCARE Scientific Validation Implementation Plan. The two Agencies have already begun to consolidate this joint Scientific Validation Implementation Plan, and its overall status will be presented. The poster will then focus on the ESA-led Validation activities, in particular on validation of the Level 1 products of the ESA instruments (ATLID, BBR, MSI) and on the ESA-developed Level 2 products. These ESA Validation activities have been the outcome of an announcement of opportunity that was issued in 2017 and for which more than 30 proposals had been received. A broad peer review of this programme took place in 2018 during the 1st ESA Validation Workshop in Bonn (held in concomitance with the 7th EarthCARE Science Workshop), and the conclusion was that if all Principal Investigators succeed to secure the corresponding funding, then the combined programme is adequate, with few areas for improvement remaining. Therefore, late opportunity still exists for supporting and complementing the EarthCARE Validation Plan</p>

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