Current status of satellite data compression in Canadian Space Agency

2007 ◽  
Author(s):  
Shen-En Qian ◽  
Allan Hollinger
Keyword(s):  
Data Compression ◽  
Satellite Data ◽  
Current Status ◽  
Space Agency

scholarly journals Oil Spill Index (OSI) to Sentinel-2 Satellite Data: QU in International Contribution

2021 ◽  
Author(s):  
S Rajendran ◽  
AS Fahad ◽  
FN Sadooni ◽  
HAS Al-Kuwari ◽  
P Vethamony ◽  
...  
Keyword(s):  
Oil Spill ◽  
Satellite Data ◽  
Emergency Preparedness ◽  
Oil Spills ◽  
European Space Agency ◽  
Optical Data ◽  
Spectral Absorption ◽  
Spectral Bands ◽  
Space Agency ◽  
Sentinel 2

An Oil Spill Index (OSI = (B3+B4)/B2) was developed and applied to Sentinel-2 optical satellite data of the European Space Agency (ESA) to map marine oil spills using spectral absorption characters of spectral bands of the Sentinel-2. The potential application of OSI and derived indices [i. (5+6)/7, (3+4)/2, (11+12)/8 and ii. 3/2, (3+4)/2, (6+7)/5] were demonstrated to the oil spills that occurred off Mauritius, Indian Ocean, on August 06, 2020, and Norilsk region, Russia on May 29, 2020, and the results were published in the peer-reviewed research journals. Recently (August 19, 2021), our methodology was recognized by the Sentinel-Hub (a repository of custom scripts) https://custom-scripts.sentinel-hub.com/sentinel-2/oil-spill-index/ for OSI calculation. We validated the remote sensing results with the drone images taken during the incident. Our OSI index is the first to be applied to Sentinel-2 optical data to map oil spills. We proved the potential of indices and the capability of Sentinel sensors to detect, map, monitor, and assess the oil spill, which can be used for emergency preparedness of oil spills.

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>

Fault-tolerance in VLSI systems design using data compression under constraints of failure probabilities-overview and current status

2013 ◽  
Vol 10 (1) ◽  
pp. 73-84
Author(s):  
Sunil Das ◽  
Satyendra Biswas ◽  
Emil Petriu ◽  
Voicu Groza ◽  
Mansour Assaf ◽  
...  
Keyword(s):  
Fault Tolerance ◽  
Data Compression ◽  
Systems Design ◽  
Current Status ◽  
Using Data ◽  
Failure Probabilities

scholarly journals Optimal Compression of High Spectral Resolution Satellite Data via Adaptive Vector Quantization with Linear Prediction

2008 ◽  
Vol 25 (6) ◽  
pp. 1041-1047 ◽  
Author(s):  
Bormin Huang ◽  
Alok Ahuja ◽  
Hung-Lung Huang
Keyword(s):  
Data Compression ◽  
Vector Quantization ◽  
Satellite Data ◽  
Spectral Resolution ◽  
Image Coding ◽  
Linear Prediction ◽  
Lossless Compression ◽  
High Spectral Resolution ◽  
Adaptive Vector Quantization ◽  
Space Data

Abstract Contemporary and future high spectral resolution sounders represent a significant technical advancement for environmental and meteorological prediction and monitoring. Given their large volume of spectral observations, the use of robust data compression techniques will be beneficial to data transmission and storage. In this paper, a novel adaptive vector quantization (VQ)-based linear prediction (AVQLP) method for lossless compression of high spectral resolution sounder data is proposed. The AVQLP method optimally adjusts the quantization codebook sizes to yield the maximum compression on prediction residuals and side information. The method outperforms the state-of-the-art compression methods [Joint Photographic Experts Group (JPEG)-LS, JPEG2000 Parts 1 and 2, Consultative Committee for Space Data Systems (CCSDS) Image Data Compression (IDC) 5/3, Context-Based Adaptive Lossless Image Coding (CALIC), and 3D Set Partitioning in Hierarchical Trees (SPIHT)] and achieves a new high in lossless compression for the standard test set of 10 NASA Atmospheric Infrared Sounder (AIRS) granules. It also compares favorably in terms of computational efficiency and compression gain to recently reported adaptive clustering methods for lossless compression of high spectral resolution data. Given its superior compression performance, the AVQLP method is well suited to ground operation of high spectral resolution satellite data compression for rebroadcast and archiving purposes.

scholarly journals The Polarimetric and Helioseismic Imager for Solar Orbiter: SO/PHI

2014 ◽  
Vol 10 (S305) ◽  
pp. 108-113 ◽  
Author(s):  
Sami K. Solanki ◽  
Jose Carlos del Toro Iniesta ◽  
Joachim Woch ◽  
Achim Gandorfer ◽  
Johann Hirzberger ◽  
...  
Keyword(s):  
High Resolution ◽  
Solar Surface ◽  
Solar Physics ◽  
European Space Agency ◽  
Magnetic Coupling ◽  
Current Status ◽  
The Sun ◽  
Heliographic Latitude ◽  
Space Agency ◽  
Visible Wavelengths

AbstractThe Solar Orbiter is the next solar physics mission of the European Space Agency, ESA, in collaboration with NASA, with a launch planned in 2018. The spacecraft is designed to approach the Sun to within 0.28 AU at perihelion of a highly eccentric orbit. The proximity with the Sun will also allow its observation at uniformly high resolution at EUV and visible wavelengths. Such observations are central for learning more about the magnetic coupling of the solar atmosphere. At a later phase in the mission the spacecraft will leave the ecliptic and study the enigmatic poles of the Sun from a heliographic latitude of up to 33○.A central instrument of Solar Orbiter} is the Polarimetric and Helioseismic Imager, SO/PHI. It will do full Stokes imaging in the Landé g = 2.5 Fe I 617.3 nm line. It is composed of two telescopes, a full-disk telescope and a high-resolution telescope, that will allow observations at a resolution as high as 200 km on the solar surface. SO/PHI will also be the first solar polarimeter to leave the Sun-Earth line, opening up new possibilities, such as stereoscopic polarimetry (besides stereoscopic imaging of the photosphere and stereoscopic helioseismology). Finally, SO/PHI will have a unique view of the solar poles, allowing not just more precise and exact measurements of the polar field than possible so far, but also enabling us to follow the dynamics of individual magnetic features at high latitudes and to determine solar surface and sub-surface flows right up to the poles.In this paper an introduction to the science goals and the capabilities of SO/PHI will be given, as well as a brief overview of the instrument and of the current status of its development.

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