STS-76 Mission Control Center Status Report # 11 Wednesday, March 27, 1996, 4 p.m. CST The Johnson Space Center Newsroom closes at 5 p.m. Wednesday and will reopen at 2 a.m. Thursday for continuing coverage of the STS-76 mission. The Atlantis astronauts are due to awaken just before 7 p.m. tonight to begin their final full day of joint docked operations with the Mir space station. Transfer of water, supplies and experiment equipment was nearly completed early Wednesday, moving 1500 pounds of water from the Atlantis to Mir. A farewell ceremony is planned for 4:38 a.m. Thursday, followed by closing of the hatches at 6:43 a.m. After the crew's sleep period during the day Thursday, the orbiter will undock from Mir at approximately 7 p.m. CST. Atlantis will fly around Mir for about an hour and a half, taking photos before firing its engines at 8:53 p.m. and dropping into a lower orbit of about 220 nautical miles. Atlantis is expected to return home Sunday, landing at the Kennedy Space Center in Florida about 6 a.m. CST. Weather considerations could alter the landing site or day of landing. Earlier Wednesday, astronauts Linda Godwin and Rich Clifford successfully completed the first ever spacewalk from a docked Space Shuttle this morning, installing four experiments on the exterior of the Russian Mir space station. Starting at 12:36 a.m. CST, the two spent six hours, two minutes and twenty-eight seconds spacewalking in Atlantis's cargo bay and on the exterior of the Mir's docking module. They smoothly performed all of the objectives planned for the spacewalk, the most important of which was to install the four experiments to monitor the space environment on the exterior of Mir for the next year and a half. Shortly after the spacewalk was completed, the hatches between Mir and Atlantis were reopened, reuniting the two space crews.