... Auroral Currents . ... 25c. Space tether . ... Aurora from Space . ... But the best view is still from space. ... The Canadian scientific satellite Isis-2 (1971) carried an auroral imaging camera and discovered the diffuse aurora, a broad ribbon around the auroral oval, too spread-out to be noticed from the ground. ... Currently, NASA's Polar (1996) collects images of the polar aurora using three cameras--in visible light (sometimes as frequently as 12 seconds apart), in ultra-violet and in x-rays. ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

... Files in red?history) . ... Auroral Currents . 25H. Birkeland Currents . ... As noted earlier Kristian Birkeland, reporting in 1903 on his expeditions to the auroral zone, proposed that magnetic disturbances accompanying the aurora were caused by large electric currents flowing down the length of auroral formations. ... In later years these currents became known as the auroral electrojets , and considerable debate ranged over their cause and the way their circuit might be completed. ...

... HST . ... HST Overview . ... 26 Jun 2015 ISR 15-06 by V. Kozhurina-Platais "ACS/WFC Revised Geometric Distortion for DrizzlePac" is now posted. 23 Jun 2015 ISR 15-03 by S. Ogaz "Post-Flash Calibration Darks for the Advanced Camera for Surveys Wide Field Channel (ACS/WFC)" is now posted. ... 07 Apr 2015 New and improved post-flashed superdark files for ACS/WFC are available in the archive. ... 12 Mar 2015 ISR 15-02 by D. Borncamp "Results of the Updated ACS/WFC Distortion Correction" is now posted. ...

... PmWiki . ... Go to new wiki . ... authors (intermediate) The (:include:) directive makes it possible to insert the contents of other pages into the current wiki page. ... In particular, any page links in the included text are assumed to link to pages in the current group if not otherwise qualified. (:include PageName:) . ... Includes the entire text of another page into the current page. (:include PageName#from#to:) . ... Includes lines from PageName between the [[#from]] and [[#to]] anchors. ...

... Users . ... Data Collection and Analysis . ... This particular part of the analysis has been disabled since the code is struggling to cope with the number of users seen this year, in particular the large contingent of people who have re-tweeted NASA. ... Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS225 by number of friends that also tweeted about AAS225 . ... by user number . ...

... Data Analysis SAS News What is SAS? ... Back to Calibration Homepage In order to analyze the data collected with XMM-Newton you need some calibration files (Current Calibration File, see below) and a copy of the Science Analysis System (SAS) available here . ... Mirroring the Calibration Archive . ... CCF$ or use instead: package=xmm-ccf comment="The XMM-Newton calibration archive" site=xmm.esac.esa.int mode_copy=true max_delete_files=100% remote_dir=pub/ccf/constituents local_dir=/ccf get_patt=^*.\...