航天技术空间服务公司正打算把它的德尔它过渡级着重用于国防部和其它政府部门。该级主要合同商麦克唐钠·道格拉斯航宇公司认为它也适用于多种商业用途。而国防通讯和导弹早期预警卫星将是这种新上面级的主要市场。两家公司的最近目标是生产一种液体推进剂上面级,其地球同步轨道运载能力为7500磅,地球同步转移轨道运载能力为2 Space Technology Space Services is planning to focus its Delt transition on Defense and other government agencies. The major contractor, MacDonald-Douglas Aerospace, sees it as suitable for a variety of commercial purposes. While the defense communications and early warning satellites for missiles will be the major markets for this new upper class. The recent goal of both companies is to produce a liquid propellant top stage with a geosynchronous orbit payload of 7500 pounds and a geosynchronous orbit transfer capability of 2