expedition 18

Expedition 18 was the 18th permanent crew of the International Space Station (ISS). The first two crew members, Michael Fincke, and Yuri Lonchakov were launched on 12 October 2008, aboard Soyuz TMA-13. With them was astronaut Sandra Magnus, who joined the Expedition 18 crew after launching on STS-126 and remained until departing on STS-119 on 25 March 2009. She was replaced by JAXA astronaut Koichi Wakata, who arrived at the ISS on STS-119 on 17 March 2009. Gregory Chamitoff, who joined Expedition 18 after Expedition 17 left the station, ended his stay aboard ISS and returned to Earth with the STS-126 crew.

The Cape Kennedy Medals patch is virtually identical to the official A-B Emblem version.

Expedition 18 was the 18th permanent crew of the International Space Station (ISS). The first two crew members, Michael Fincke, and Yuri Lonchakov were launched on 12 October 2008, aboard Soyuz TMA-13. With them was astronaut Sandra Magnus, who joined the Expedition 18 crew after launching on STS-126 and remained until departing on STS-119 on 25 March 2009. She was replaced by JAXA astronaut Koichi Wakata, who arrived at the ISS on STS-119 on 17 March 2009. Gregory Chamitoff, who joined Expedition 18 after Expedition 17 left the station, ended his stay aboard ISS and returned to Earth with the STS-126 crew.

This version from A-B Emblem features the crew member's names. It is harder to find than the souvener version.

Expedition 18 was the 18th permanent crew of the International Space Station (ISS). The first two crew members, Michael Fincke, and Yuri Lonchakov were launched on 12 October 2008, aboard Soyuz TMA-13. With them was astronaut Sandra Magnus, who joined the Expedition 18 crew after launching on STS-126 and remained until departing on STS-119 on 25 March 2009. She was replaced by JAXA astronaut Koichi Wakata, who arrived at the ISS on STS-119 on 17 March 2009. Gregory Chamitoff, who joined Expedition 18 after Expedition 17 left the station, ended his stay aboard ISS and returned to Earth with the STS-126 crew.

This is the common A-B Emblem souvenir version. 

STS-119 (ISS assembly flight 15A) was a space shuttle mission to the International Space Station (ISS) which was flown by Space Shuttle Discovery during March 2009. It delivered and assembled the fourth starboard Integrated Truss Segment (S6), and the fourth set of solar arrays and batteries to the station. The launch took place on 15 March 2009, at 19:43 EDT.
STS-119 delivered the S6 solar arrays to the space station, completing the construction of the Integrated Truss Structure. STS-119 also carried several experiments, including the Shuttle Ionospheric Modification with Pulsed Local EXhaust (SIMPLEX), Shuttle Exhaust Ion Turbulence Experiments (SEITE), and Maui Analysis of Upper Atmospheric Injections (MAUI). STS-119 was also used for the "Boundary Layer Transition Detailed Test Objective" experiment. 

The shape of the STS-119/15A patch comes from the shape of a solar array viewed at an angle. The International Space Station (ISS), which is the destination of the mission, is placed accordingly in the center of the patch just below the gold astronaut symbol. The gold solar array of the ISS highlights the main cargo and task of STS-119/15A -- the installation of the S6 truss segment and deployment of S6's solar arrays, the last to be delivered to the ISS. The surnames of the crew members are denoted on the outer band of the patch. The 17 white stars on the patch represent, in the crew's words, "the enormous sacrifice the crews of Apollo 1, Challenger, and Columbia have given to our space program." The U.S. flag flowing into the space shuttle signifies the support the people of the United States have given our space program over the years, along with pride the U.S. astronauts have in representing the United States on this mission.

There is also an early version of the A-B Emblem version that varies slightly from this patch.

STS-119 (ISS assembly flight 15A) was a space shuttle mission to the International Space Station (ISS) which was flown by Space Shuttle Discovery during March 2009. It delivered and assembled the fourth starboard Integrated Truss Segment (S6), and the fourth set of solar arrays and batteries to the station. The launch took place on 15 March 2009, at 19:43 EDT.
STS-119 delivered the S6 solar arrays to the space station, completing the construction of the Integrated Truss Structure. STS-119 also carried several experiments, including the Shuttle Ionospheric Modification with Pulsed Local EXhaust (SIMPLEX), Shuttle Exhaust Ion Turbulence Experiments (SEITE), and Maui Analysis of Upper Atmospheric Injections (MAUI). STS-119 was also used for the "Boundary Layer Transition Detailed Test Objective" experiment. 

The shape of the STS-119/15A patch comes from the shape of a solar array viewed at an angle. The International Space Station (ISS), which is the destination of the mission, is placed accordingly in the center of the patch just below the gold astronaut symbol. The gold solar array of the ISS highlights the main cargo and task of STS-119/15A -- the installation of the S6 truss segment and deployment of S6's solar arrays, the last to be delivered to the ISS. The surnames of the crew members are denoted on the outer band of the patch. The 17 white stars on the patch represent, in the crew's words, "the enormous sacrifice the crews of Apollo 1, Challenger, and Columbia have given to our space program." The U.S. flag flowing into the space shuttle signifies the support the people of the United States have given our space program over the years, along with pride the U.S. astronauts have in representing the United States on this mission.

The original version differs slightly from the STS-119 patch that was later approved. "Wakata" was moved to the bottom, "15A" was removed, and "119" was made more prominant.

STS-126 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Endeavour.[3] The purpose of the mission, referred to as ULF2 by the ISS program, was to deliver equipment and supplies to the station, to service the Solar Alpha Rotary Joints (SARJ), and repair the problem in the starboard SARJ that had limited its use since STS-120. STS-126 launched on 14 November 2008 at 19:55:39 pm EST from Launch Pad 39A at NASA's Kennedy Space Center with no delays or issues.
STS-126 was scheduled to be a sixteen day mission with four spacewalks, largely dedicated to servicing and repair of the Solar Alpha Rotary Joints (SARJ). An additional docked day was added to the flight plan to give the crew more time to complete their tasks.[18] The starboard SARJ had shown anomalous behavior since August 2007, and its use has been minimized pending diagnosis and repair. Both the starboard and port SARJs were serviced. In addition to lubricating both bearings, the remaining 11 trundle bearings in the starboard SARJ were replaced. Trundle bearing assembly five was removed during an Expedition 16 EVA for further examination in December 2007.
STS-126 included the Leonardo Multi-Purpose Logistics Module (MPLM) on its fifth spaceflight.

The STS-126 patch represents Space Shuttle Endeavour on its mission to help complete the assembly of the International Space Station (ISS). The inner patch outline depicts the Multi-Purpose Logistics Module (MPLM) Leonardo. This reusable logistics module will carry the equipment necessary to sustain a crew of six on board the ISS and will include additional crew quarters, exercise equipment, galley, and life support equipment. In addition, a single expedition crew member will launch on STS-126 to remain on board ISS, replacing an expedition crew member who will return home with the shuttle crew. Near the center of the patch, the constellation Orion reflects the goals of the human spaceflight program, returning us to the Moon and on to Mars, the red planet, which are also shown. At the top of the patch is the gold symbol of the astronaut office. The sunburst, just clearing the horizon of the magnificent Earth, powers all these efforts through the solar arrays of the ISS current configuration orbiting high above.

This version of the STS-126 patch is very similar to the A-B Emblem version however it lacks the red star and has some other subtle differences.

STS-126 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Endeavour.[3] The purpose of the mission, referred to as ULF2 by the ISS program, was to deliver equipment and supplies to the station, to service the Solar Alpha Rotary Joints (SARJ), and repair the problem in the starboard SARJ that had limited its use since STS-120. STS-126 launched on 14 November 2008 at 19:55:39 pm EST from Launch Pad 39A at NASA's Kennedy Space Center with no delays or issues.
STS-126 was scheduled to be a sixteen day mission with four spacewalks, largely dedicated to servicing and repair of the Solar Alpha Rotary Joints (SARJ). An additional docked day was added to the flight plan to give the crew more time to complete their tasks.[18] The starboard SARJ had shown anomalous behavior since August 2007, and its use has been minimized pending diagnosis and repair. Both the starboard and port SARJs were serviced. In addition to lubricating both bearings, the remaining 11 trundle bearings in the starboard SARJ were replaced. Trundle bearing assembly five was removed during an Expedition 16 EVA for further examination in December 2007.
STS-126 included the Leonardo Multi-Purpose Logistics Module (MPLM) on its fifth spaceflight.

The STS-126 patch represents Space Shuttle Endeavour on its mission to help complete the assembly of the International Space Station (ISS). The inner patch outline depicts the Multi-Purpose Logistics Module (MPLM) Leonardo. This reusable logistics module will carry the equipment necessary to sustain a crew of six on board the ISS and will include additional crew quarters, exercise equipment, galley, and life support equipment. In addition, a single expedition crew member will launch on STS-126 to remain on board ISS, replacing an expedition crew member who will return home with the shuttle crew. Near the center of the patch, the constellation Orion reflects the goals of the human spaceflight program, returning us to the Moon and on to Mars, the red planet, which are also shown. At the top of the patch is the gold symbol of the astronaut office. The sunburst, just clearing the horizon of the magnificent Earth, powers all these efforts through the solar arrays of the ISS current configuration orbiting high above.