See Doomed Spacecraft Before Its Fiery Demise

Written by Nancy Atkinson

ATV. credit: ESA

The Jules Verne Automated Transfer Vehicle (ATV) has done its duty – it even went above and beyond its expected capabilities. But the end is nigh, and soon, on September 29 the ATV will become a fireball and burn up in theEarth's atmosphere, never to be seen again. But before it does, people in North America and Europe have the perfect opportunity to see it sail overhead this weekend in its low Earth orbit, and according toSpaceweather.com, the ATV will glow about a brightly as the North Star, Polaris. To find out when and where to look for the ATV in the evening or early morning skies, check out Spaceweather.com's great satellite tracking webpage. Just plug in your zip code and you'll be able to get tracking information for all the satellites that will be visible for the next few days. Also, Heavens Above is a great site to find tracking information, as well. So get out there and bid Jules Verne adieu. Here's some of the great things the ATV accomplished while on orbit at the ISS, and a movie of its undocking too…

The Jules Verne spent five months docked to the space station where it delivered supplies (and fun things like a manuscript written by its namesake.) The supply ship turned into a tug boat when its engines were fired up to help the ISS avoid a piece of space junk. It also served as an impromptu bedroom for the space station crew.

When will the next ATV fly? Sometime in 2010, and the name for that ship has not yet been revealed. It will follow the debut of another space station cargo ship, Japan's H-2A Transfer Vehicle, set for next year.

Here's a movie of the Jules Verne undocking from the ISS.

Source: Spaceweather.com, universetoday

Hubble NICMOS Instrument Experiences Anomaly

Written by Nancy Atkinson

NICMOS

A cooling system for the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) science instrument aboard the Hubble telescopeexperienced an anomaly during a restart, causing the instrument to go into safe mode. After a couple of additional restarts, the problem still persists, and a decision was made for NICMOS to "stand down" while engineers study the anomaly and allow the cooling system to warm up, which may take a couple of weeks. In the short term, this will affect planned science observations, and engineers are hoping to avoid any long term complications. At this point, if the problem cannot be fixed from the ground, it is unclear how it might affect the upcoming servicing mission, scheduled for an Oct. 10 launch.

New software was uploaded last week to the computer that controls Hubble's five science instruments to get the telescope ready for the upcoming servicing mission (SM4). Installation of the software requires putting all of the telescope's science instruments into safe mode configuration for a short period of time.

About six hours after the system was reactivated, at about 4 a.m. EDT on Sept. 11, the NICMOS anomaly was seen. The cooling system put itself into safe mode after seeing too high a speed in the circulator pump operation. After studying data, flight controllers modified operating protection parameters and attempted a restart of the system on Sunday, Sept. 14. The circulator system again indicated a high speed violation so the system was returned to safe mode.

Engineers believe the ice particles in the cooling loop could be causing the problem. With some small adjustments in start-up procedures, engineers think the cooling system can be successfully reactivated. The flight team tried another restart Monday evening (9/15). The anomaly was still seen after that restart, so the Hubble Project's plan now is to stand down from any additional attempts to restart. Engineers will study the anomaly while waiting until the cooling system has been allowed to warm somewhat, which may take several weeks.

The impact to planned NICMOS science operations involves approximately 70 exposures from three guest observer programs and additional exposures from two NICMOS internal calibration programs. Additionally, all NICMOS science has been removed from this week’s observation schedule. Sixty-one orbits of NICMOS science were scheduled for the week between September 15 and September 21.

The servicing mission already has a jam-packed schedule, and its uncertain if any last minute additions to the mission would be possible.

Source: NASA, Universe Today

Welcome to the Blog

Hello readers!

This blog is intended for the Kingston University students enrolled in the Astronautics and space engineering course.  You can expect to see:

• Space news articles, 
  
• Hints, tips and advice on the course modules, 
  
• Reports on what we are doing and 
  
• Links to useful/interesting sites

Comments on any of the posts are more than welcome, but requests for exam results (before the exam) will not be indulged!

More to come shortly!

Regards,

Dr Barnaby Osborne