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NASA正为发射深空原子钟(DSAC)演示验证做准备,这项演示验证通过实现航天器实时授时、计算自己的导航数据,创新性地改变现有的导航方式。深空原子钟采用单向导航技术,将改善目前双向导航系统中信息发送到地面、再由地面团队授时和计算导航数据后,传送回航天器的局面。深空原子钟采用的这种单向深空导航技术比传统的双向导航技术能更有效地利用现有的深空网络,从而在不需增加任何新天线和相关费用的情况下扩大网络的容量。未来NASA任务中使用深空原子钟,将使无线电和导航数据传输量提升2～3倍;提高数据品质,使深空探测任务的导航、重力学、掩星学准确度提高10倍;将下一代GPS系统原子钟稳定性提高100倍。
NASA is preparing for launching Deep Space Atomic Clock (DSAC) demonstration demonstrations that innovatively change existing navigation by enabling real-time on-boarding of the spacecraft, calculating its own navigation data and enabling it to be used. The deep space atomic clock uses one-way navigation technology, which will improve the current information in the two-way navigation system to the ground, and transmit the spacecraft back to the spacecraft once it is timed and calculated by the ground crew. This one-way deep space navigation technology used by deep-space atomic clocks can utilize existing deep-space networks more efficiently than traditional two-way navigation techniques, thereby expanding the capacity of the network without adding any new antennas and associated costs. The use of deep-space atomic clocks in future NASA missions will increase radio and navigation data transmission by 2 to 3 times; improve data quality and improve the accuracy of navigational, gravimetric and occultation studies of deep-space exploration missions by a factor of 10; GPS system atomic clock stability increased by 100 times.