![]() It achieved its first milestone by making data from SDO and SOHO easily accessible to the scientific community and general public and continues to enjoy popularity in the scientific community, also because of its open source approach. The aim of the Helioviewer Project is to enable exploration of the Sun and the inner heliosphere for everyone, everywhere, via intuitive interfaces and novel technology. Together with the web application, it is part of the joint ESA/NASA Helioviewer Project 1. 2009) addresses these three problems using a novel approach: image data is lossily compressed using the JPEG 2000 standard ( Taubman & Marcellin 2002) and served on demand in a quality-progressive, region-of-interest-based stream. From a scientist’s perspective this poses three problems: accessing, browsing, and finding interesting data as efficiently as possible. Such staggering volumes of data are accessible only from a few repositories, and users have to deal with data sets that are effectively immobile and practically difficult to download. 2012) has been returning 1.4 terabyte of image data per day, more than three orders of magnitude more than the Solar and Heliospheric Observatory (SOHO, Domingo et al. Since its launch in 2010, the Solar Dynamics Observatory (SDO, Pesnell et al. This constantly increasing volume is both a blessing and a barrier: a blessing for providing data with significantly higher spatial and temporal resolution, but also a barrier for scientists to access, browse, and analyse them. Over the last decade, the amount of data returned from space- and ground-based solar telescopes has increased by several orders of magnitude. Key words: Sun: general / Sun: activity / virtual observatory tools / methods: observational / methods: data analysis / methods: numerical As a first step towards supporting science planning of the upcoming Solar Orbiter mission, JHelioviewer offers a virtual camera model that enables users to set the vantage point to the location of a spacecraft or celestial body at any given time. Once an interesting event has been identified, science quality data can be accessed for in-depth analysis. The software integrates solar event data and a timeline display. ![]() With JHelioviewer, users can visualise the Sun for any time period between September 1991 and today they can perform basic image processing in real time, track features on the Sun, and interactively overlay magnetic field extrapolations. The JHelioviewer software is open source, platform independent, and extendable via a plug-in architecture. The JPEG 2000 standard offers useful new features that facilitate the dissemination and analysis of high-resolution image data and offers a solution to the challenge of efficiently browsing petabyte-scale image archives. Since the first release of JHelioviewer in 2009, the scientific functionality of the software has been extended significantly, and the objective of this paper is to highlight these improvements. ![]() To address these challenges, we have developed JHelioviewer, a visualisation tool for solar data based on the JPEG 2000 compression standard and part of the open source ESA/NASA Helioviewer Project. From a scientist’s perspective this poses three problems: accessing, browsing, and finding interesting data as efficiently as possible.Īims. In particular, the large volume of SDO data presents challenges the data are available only from a few repositories, and full-disk, full-cadence data for reasonable durations of scientific interest are difficult to download, due to their size and the download rates available to most users. Solar and Heliospheric Observatory, SOHO), multiple viewpoints (Solar TErrestrial RElations Observatory, STEREO), and returning large amounts of data (Solar Dynamics Observatory, SDO). Solar observatories are providing the world-wide community with a wealth of data, covering wide time ranges (e.g. Circulaire, 1180 Brussels, Belgiumģ University of Applied Sciences Northwestern Switzerland, 5210 Windisch, SwitzerlandĤ Department of Informatics, University of Almería, 04120 Almería, Spainĥ ADNET Systems Inc., NASA Goddard Space Flight Center, Greenbelt, MD 20771, USAĦ ESA Operations Department, c/o NASA Goddard Space Flight Center, Greenbelt, MD 20771, USAĬontext. Fleck 6ġ European Space Agency, ESTEC, PO Box 299, 2200 AG Noordwijk, The NetherlandsĮ-mail: Royal Observatory of Belgium, Ringlaan – 3 – Av.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |