This Mission Report provides an update on the current FUSE status.

The FUSE team has made steady progress toward returning FUSE to scientific operations after the loss of the third reaction wheel (out of four) back on 27 Dec. 2004. A new FUSE safe mode and an initial "proof of concept" 1-wheel attitude control mode were developed. This revised flight software was uplinked on 22 Mar. 2005, and was used for several weeks of successful operations .

As shown in this "first light image" obtained in late March 2005 during intial testing after the loss of the third reaction wheel, there are no significant changes in scientific capability or performance due to the hiatus in operations.

On 17 April 2005, another hardware failure occurred when the redundant roll axis gyro failed. During the first week of June 2005, we were back on the sky and demonstrated sub-arcsecond pointing with the so-called "gyroless" version of the 1-wheel control software! The science operations staff at JHU is developing new software tools that are providing insights into how and where on the sky we will be able to operate as a function of time.

If you want to follow developments more closely, FUSE Mission Status Reports are posted 1-2 times per month on the FUSE web site: http://fuse.pha.jhu.edu/facts/misstat.html