National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
News & Events
Galileo Millennium Mission Status
Galileo Millennium Mission Status
24 May 2001
(Source: Jet Propulsion Laboratory)

MEDIA RELATIONS OFFICE
JET PROPULSION LABORATORY
CALIFORNIA INSTITUTE OF TECHNOLOGY
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
PASADENA, CALIF. 91109. TELEPHONE (818) 354-5011
http://www.jpl.nasa.gov

The camera on NASA's Galileo spacecraft may not be working properly as the spacecraft heads toward Jupiter's moon Callisto for a close flyby on Friday at 4:24 a.m. (PDT).

"We are not totally surprised, because we knew all along that Galileo might encounter difficulties from passing close to Jupiter's powerful radiation belts," said Dr. Eilene Theilig, Galileo project manager at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "We are attempting to get a better understanding of the problem and to do what we can to minimize the loss of images."

Voltage readings received from the camera yesterday and today are the same as when the camera was in a problem state during its last previous flyby, passing the moon Ganymede five months ago. During that flyby the condition was intermittent. It self-corrected spontaneously several times and was also corrected by commands from the ground to cycle its power off and on. More than half of the 120 images taken during that encounter period were captured successfully.

This week, however, indications of the problem began shortly before this orbit's closest approach to Jupiter on Wednesday morning and have persisted in every voltage reading received since then, even after the power-cycle commands, Theilig said mid-day Thursday.

"We may have lost the camera images scheduled so far, but the bulk of the camera observations are tomorrow morning at Callisto," she said.

Other scientific experiments on Galileo, including infrared imaging of Jupiter's clouds and a radio study of Jupiter's atmosphere, have functioned properly during this pass through the inner portion of Jupiter's system. Data will be transmitted to Earth during the next two months.

This is Galileo's 30th orbit of Jupiter since arriving at the giant planet in 1995. The original mission lasted two years in orbit, but the mission has been extended three times. By repeatedly passing through the highly radioactive environment close to Jupiter, Galileo has endured more than three times as much radiation as it was designed to withstand. Radiation damage to an electronic component is the main suspect in the camera's problem.

Additional information about the Galileo mission is available at http://galileo.jpl.nasa.gov. JPL, a division of the California Institute of Technology in Pasadena, manages the Galileo mission for NASA's Office of Space Science, Washington, D.C.

News Archive Search  Go!
Show  results per page
 
 
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writer: Autumn Burdick
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> USA.gov
> ExpectMore.gov
> NASA Advisory Council
> Open Government at NASA
Last Updated: 5 Jun 2001