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NASA在1993年9月成功地发射了它的现代通信技术卫星(Advanced Communication Technology Satellite,ACTS)时,就开始了一项研究和试验课题……Ka-频带卫星通信系统。NASA Lewis研究中心的项目协调人Erwin Edelman说:目前国际电信联合会[ITU]对Ka-频带的认识都是直接来源于ACTS的。
When NASA successfully launched its Advanced Communication Technology Satellite (ACTS) in September 1993, it started a research and pilot project ... the Ka-band satellite communications system. Erwin Edelman, project coordinator at NASA Lewis Research Center, said: At present, the International Telecommunication Union [ITU] knowledge of the Ka-band is derived directly from ACTS.