English: On Launch Pad 39A, Space Shuttle Endeavour is viewed late at night from a point on the Rotating Service Structure more than 225 feet from the ground. Abutting the side of Endeavour is the orbiter access arm with the environmental chamber known as the White Room at the end. The White Room provides access to the crew compartment. Endeavour waits for mission STS-99, known as the Shuttle Radar Topography Mission (SRTM), which will chart a new course to produce unrivaled 3-D images of the Earth's surface. The result of the SRTM could be close to 1 trillion measurements of the Earth's topography. 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.