Daily News Thursday, April 29, 1993 Two Independence Square, Washington, D.C. Audio Service: 202/358-3014 % STS-55 mission continues; % Admin. Goldin to debate space colonization; % Dr. Pellerin to discuss NASA's strategic management process. Payload activities went well aboard the spacelab as the STS-55 mission continues in its fourth day. Payload specialists performed experiments in materials science and biological science. Crew members aboard the Space Shuttle Columbia also participated in an in-flight press interview with two German television stations yesterday. As for the waste water tank anomaly, the crew and flight control team members verified the contingency waste collection bag installation by performing a short waste water dump. All systems worked as more than 20 pounds of waste liquid were expelled from the orbiter. Space Shuttle Columbia is scheduled to conclude the STS-55 mission with a landing at the Kennedy Space Center on May 5 at 8:53 a.m. EDT. * * * * * * * * * * * * * * * * Tonight, at 8:00 p.m. EDT in the National Air and Space Museum's Langley Theater, NASA Administrator Daniel Goldin and Duke University History Professor Alex Roland will debate space colonization in the annual Wernher von Braun Memorial Lecture. Professor Roland is known as an opponent of manned space flight. * * * * * * * * * * * * * * * * Tomorrow, Dr. Charles Pellerin, Associate Deputy Administrator for Strategic Planning, will discuss the status of NASA's strategic management process. Dr. Pellerin's presentation will include brief descriptions of the strategic planning process, results from the NASA town meetings, and employee vision and development activities. All employees are invited to attend. The presentation will be held in the NASA Auditorium at 11:00 a.m. EDT. * * * * * * * * * * * * * * * * Here's the broadcast schedule for Public Affairs events on NASA TV. Note that all events and times may change without notice and that all times listed are Eastern. Live indicates a program is transmitted live. NASA TV will cover the STS-55 mission from lift - off to landing. 2:00 pm STS-55 Mission Update 9:30 pm Replay Flight Day Activities The editor is Sonja Maclin on 202/358-1761 or SMACLIN on NASAmail. NASA TV is carried on GE Satcom F2R, transponder 13, C-Band, 72 degrees West Longitude, transponder frequency is 3960 MHz, audio subcarrier is 6.8 MHz, polarization is vertical.