The US space agency is scheduled to retire its space shuttles next year, and has begun the development of a new human space launch "architecture" called Constellation.
美国航天局计划在明年让航天飞机退役，现在他们已经开始开发一种新的被称作星座的载人太空发射装置。
Both satellites were built at Surrey satellite Technology Limited (SSTL) in Guildford, under contract with the Nigerian National Space Research and Development Agency (NASRDA).
这两颗卫星都是在吉尔福德的萨里卫星技术有限公司(SSTL)，根据和尼日利亚国家空间研究和发展署(NASRDA)的合同制造的。
Both satellites were built at Surrey satellite Technology Limited (SSTL) in Guildford, under contract with the Nigerian National Space Research and Development Agency (NASRDA).
这两颗卫星都是在吉尔福德的萨里卫星技术有限公司(SSTL)，根据和尼日利亚国家空间研究和发展署(NASRDA)的合同制造的。
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