Stock Photo - 02/11/2000 ___ Before entering the orbiter Endeavour, STS_99 Mission Specialist Janice Voss is helped by Travis Thompson and Jack Burritt, members of the White Room closeout crew. The White Room is an environmental chamber at the end of the orbiter access arm, on the fixed service structure, that provides entry to the orbiter crew compartment. STS_99, known as the Shuttle Radar Topography Mission SRTM, will chart a new course to produce unrivaled 3_D images of the Earth´s surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth´s topography. Scheduled for liftoff at 12:30 p.m. EST, the mission is expected to last 11days, with Endeavour landing at KSC Tuesday, Feb. 22, at 4:36 p.m. EST. This is the 97th Shuttle flight and 14th for Shuttle Endeavour