S-131 (ISS assembly flight 19A) was a NASA Space Shuttle mission to the International Space Station (ISS). Space Shuttle Discoverylaunched on 5 April 2010 at 6:21 am from Kennedy Space Centre's's launch pad 39-A, and landed at 9:08 am on 20 April 2010 on runway 33 at the Kennedy Space Center's Shuttle Landing Facility. The mission marked the longest flight for space shuttle Discovery.
The primary payload was a Multi-purpose Logistics Module loaded with supplies and equipment for the International Space Station. The mission also removed and replaced an ammonia tank assembly outside the station on the S1 truss. STS-131 furthermore carried several on-board payloads; this mission had the most payloads since STS-107.
This was the final Space Shuttle mission with a seven person crew
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This mission was the second flight of the TriDAR, a 3D dual-sensing laser camera, intended for potential use as an autonomous rendezvous and docking sensor. TriDAR provides guidance information that can be used to guide a vehicle during rendezvous and docking operations in space. TriDAR does not rely on any reference markers, such as reflectors, positioned on the target spacecraft. To achieve this, it relies on a laser based 3D sensor and a thermal imager. Geometric information contained in successive 3D images is matched against the known shape of the target object to calculate its position and orientation in real-time. The TriDAR tracked the ISS position and orientation from the shuttle during docking, undocking, and flyaround operations.
Canadarm2 grapples the MPLM Leonardo in Discovery's payload bay, prior to berthing
Mastracchio and Anderson working in Discovery's aft payload bay during EVA 3
