Archive for May, 2011

Helioviewer.org 2.2.0 Released

Helioviewer.org has been updated to include several new features and a number of bug fixes. Although the update is focused primarily on improving the reliability and performance, several new features have been added, and over the next 2-3 weeks you should begin to see new types of images from the STEREO mission.

Try it out! If you have any comments or suggestions, or run into any problems, report a bug or feature request.

RELEASE NOTES:

Helioviewer.org 2.2.0 is a major release including a number of stability and performance improvements, as well as a large amount of bug fixes. The main focus of this release is the recently added movie and screenshot creation capabilities. A large amount of work has been done to improve the reliability of those features, and also to pave the way for new functionality which will be added in upcoming releases and will be directed at giving users more fine-tuned control over the movie creation process.

New features:

* STEREO EUVI/COR image support (images will begin to appear online in the next 2-3 weeks!)
* WebM support
* IE9 HTML5 video support added
* YouTube video sharing support added
* New flash video player (Flowplayer)
* Improved screenshot quality
* Better mobile support (drag and drop, working sliders, etc)
* Added a data monitor page (http://www.helioviewer.org/status)

Bug fixes:

* Fixed bug #693901 Enable lookup of video properties using only its id
* Fixed bug #332020 Double-click zoom functioning incorrectly
* Fixed bug #602756 Optimize movie generation when near end of available data
* Fixed bug #662607 HTML5 Video format choice should be based on browser and not OS
* Fixed bug #662897 Avoid using compressed images during movie frame generation
* Fixed bug #692574 Generate WebM videos for each movie request
* Fixed bug #701509 Use RSUN instead of CDELT when scaling EIT images
* Fixed bug #730701 Speed up time with which shared videos appear on Helioviewer.org
* Fixed bug #735617 Store meta-information for tiles and screenshots generated by Helioviewer.org
* Fixed bug #781148 Use current time as default observation time
* Fixed bug #193782 Cursor bug in IE
* Fixed bug #609225 When attempting to use the Flash video browser, perform check for Flash support
* Fixed bug #612506 Movie pop-up menu returns NaN for older movies
* Fixed bug #621798 Use jQuery instead of Shadowbox when displaying Helioviewer.org Link
* Fixed bug #783483 IE: background image disappears in fullscreen mode
* Fixed bug #785792 When changing one field in a layer (e.g. observatory) attempt to preserve all other properties
* Fixed bug #691081 Add a “Share on Youtube” button
* Fixed bug #696346 Add metadata to generated movies
* Fixed bug #624817 Media History clear button stops working
* Fixed bug #666756 First getDataSources query after new data is added becomes very slow
* Fixed bug #605020 Helioviewer.org Movies should not include redundant frames
* Fixed bug #614001 Movie history does not disappear when creating movie
* Fixed bug #712095 Helioviewer-specific header tags not displayed in information dialog for newer images
* Fixed bug #725539 When building movies, ignore failures limited to a single frame
* Fixed bug #387365 Slider bars do not work on Safari on iPod touch
* Fixed bug #666809 Timestamp text overlaps icons on some Linux systems
* Fixed bug #669895 For movie generation failures specify whether failure occured during image creation or movie encoding
* Fixed bug #697191 High-quality video download button is cut-off on some browsers/display screens
* Fixed bug #700024 Metalinks not easily readable on large screens
* Fixed bug #704980 Suggestion for a better movie player dialog box title
* Fixed bug #376995 Make JP2 creation information available via helioviewer.org

Library updates:

* jQuery (1.4.2 => 1.6)
* jQuery imgAreaSelect (0.9.2 => 0.9.5)
* jQuery jGrowl (1.2.4 => 1.2.5)
* jQuery qTip (1.0 r54 => 2.0.0pre)
* jQuery UI (1.8 => 1.8.12)

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Unusual streaks detected in LASCO-C3

This image caught our attention for the unusual streaks in the LASCO-C3 field of view:

What causes the streaks? Well, it turns out this has been seen before – check out this similar example and and an explanation of what they are.

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Sneak peak at STEREO data…

We’re working on including data from NASA’s STEREO (Solar TErrestrial RElations Observatory, stereo.gsfc.nasa.gov) mission. It’s a mission consisting of two spacecraft, one drifting ahead of the Earth, and drifting behind, taking images of the Sun and the inner heliosphere. The concept behind the mission is to view the Sun as a three-dimensional object, from which we can better understand its surface structures and how it influences the inner heliosphere. This is the view from STEREO-A, and this is the view of the same event from STEREO-B. Both movies are of coronagraph data taken with the COR2 instrument; both STEREO spacecraft have the same instrument suites onboard.

We hope to have a stream of the very latest STEREO images very soon. Watch this space!

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FYI: LASCO images

Some of you may have noticed that recent LASCO C2 images are upside down. You can notice this quite easily, as the streamer belts in LASCO C2 do not line up with the streamer belts in LASCO C3. This is due to an error in the way we write out LASCO C2 images. We are diagnosing the problem and will rewrite the affected images shortly. This in itself will be delayed due to the fact that the machine which writes out new LASCO C2 and C3 images will be offline for a couple of days. We apologize for the interruption to our service in the delivery of good quality new and recent LASCO images. Older LASCO images are unaffected, as are HMI and AIA images.

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