![]() The code can even be reused for other purposes it is already being used for Mars data and in medical research. It is open-source software, meaning that all its components are freely available so others can help to improve the program. JHelioviewer is written in the Java programming language, hence the J at the beginning of its name. This is an interactive visual archive of the entire SOHO mission. With JHelioviewer, everyone can do this in minutes. ∻efore, it took hours to combine images from different telecopes to make a movie of the Sun for a given period. We wanted to make it easy to view solar images from different observatories and instruments, and to make it easy to make movies, says Daniel Müller, ESA SOHO Deputy Project Scientist. The data was captured by NASA's Solar Dynamic Observatory and the movie was constructed using ESA's JHelioviewer. A gigantic mega-filament of incandescent gas erupts from the Sun. They can export their finished movies in various formats, and track features on the Sun by compensating for solar rotation. Using this new software, users can create their own movies of the Sun, colour the images as they wish, and image-process the movies in real time. The downloadable JHelioviewer is complemented by the website, a web-based image browser. More than a million images from SOHO can already be accessed, and new images from NASAs Solar Dynamics Observatory are being added every day. Developed as part of the ESA/NASA Helioviewer Project, it provides a desktop program that enables users to call up images of the Sun from the past 15 years. This poster will illustrate the new and expanded functionality of JHelioviewer and highlight the advantages of JPEG 2000 as a new compression standard for solar image data.JHelioviewer is new visualisation software that enables everyone to explore the Sun. Currently focused on solar physics data, JHelioviewer can easily be adapted for use in other areas of space and earth sciences. The random code stream access of JPIP minimizes data transfer by streaming image data in a region-of-interest and quality-progressive way, while OpenGL enables rapid hardware-accelerated image processing and rendering. JHelioviewer uses the JPEG 2000 Interactive Protocol (JPIP) and OpenGL. JHelioviewer is a cross-platform application that offers movie streaming, real-time frame-by-frame image processing, feature/event overlays and will enable users to access SDO science data via a VSO interface. JHelioviewer will make the vast amount of SDO images available to the worldwide community in this format, which is already being used for all SOHO images. Using the very efficient lossy compression mode of JPEG 2000, a full-size SDO image can be compressed to 1 MByte at good visual quality for browsing purposes. To address this challenge, we have developed JHelioviewer, a JPEG 2000-based visualization and discovery software for solar image data. For SDO, the former approach is prohibitive due to the shear data volume, while the latter does not do justice to the high resolution and cadence of the images. So far, the tools available to the scientific community either require downloading all potentially relevant data sets beforehand in their entirety or provide only movies with a fixed resolution and cadence. In order to fully exploit their data, scientists need to be able to browse and visualize many different data products spanning a large range of physical length and time scales. ![]() Space missions generate an ever-growing amount of data, as impressively highlighted by the Solar Dynamics Observatory's (SDO) expected return of 1.4 TByte/day.
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