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Extreme Ultraviolet Explorer Reentry Sooner than Expected?

Status Report From: University of California Berkeley
Posted: Thursday, January 3, 2002

The following note was sent out to the EUVE Guest Observers email list.

For more information on this mission and its termination see:

  • Extreme Ultraviolet Explorer Mission (7 June 1992 - 31 January 2001), NASA GSFC

  • Save EUVE Update 26 September 2000


    Dear EUVE GOs,

    It is looking like re-entry might be this month -- a couple months sooner than we all thought.

    We are no longer relying on FDF for info on the orbit decay.

    Heavens-above.com shows it at 302 km altitude today (this is down from the original ~527 km). Apparently, once it gets down to about 300 km it will be fall very quickly.... and death is imminent at 200 km. It has been losing at least a km every day now for the last couple weeks.

    Former EUVE scheduler Bryce Roberts found a website with reentry predicts at www.wingar.demon.co.uk/satevo/current.htm. This isn't always up to date, but the guy provides a script (www.wingar.demon.co.uk/satevo/#Download) that takes realtime NORAD data (www.celestrak.com/NORAD/elements/science.txt) and comes up with re-entry predicts. Using the script with the more recent numbers, the latest is January 21!!!!

    HOWEVER...

    NORAD's data is *usually* only good for the next 24 hours. Because of the way they measure the drag component for orbits the data is very unrelaible for reentry predictions. So, the above can never be very accurate...

    Soon, the Aerospace Corporation will be following the EUVE reentry at www.reentrynews.com/upcoming.html. They will start predictions once they think we are about a month before the reentry.

    I will likely email you all again before burn-up, but these sites will be the best way for you to keep on top of it.

    Happy New Year!

    Jennifer Cullison


    This list will be used primarily for news relating to the summer 2001 EUVE conference and EUVE satellite re-entry. It is not related to the former egoinfo. To subscribe other email addresses to this list, send an e-mail to majordomo@listlink.berkeley.edu and include"subscribe euve_guest_observers" in the body of the message. Leave the subject line blank. If you have questions, email jennifer@ssl.berkeley.edu.

    // end //

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