长河二号授时监测接收机设计与实现

长波授时系统是目前国际上授时精度较高的大型地基无线电授时服务系统,其授时信号采用罗兰C信号发播体制,具有作用距离远、稳定性好、可靠性高、抗干扰能力强等优点。针对GNSS信号在某些特定区域易被干扰、易失锁的问题,设计并实现了一种长河二号授时监测接收机,采用信号完好性检测、ASF（附加二次相位因子）时延修正等技术,实现了高精度、高可靠长波授时与时差监测,可作为GNSS授时的重要补充手段。

Research on In-situ Thickness Measurement of Atomic Layer #br#Deposition Nano-Passivation Layers

Atomic layer deposition of inorganic nano-film technology is widely used in military and civilian applications.In this paper,the in-situ quartz crystal microbalance measurement system was used to study the growth process of atomic layer deposition inorganic film,and the film thickness was measured by quartz crystal microbalance.By studying the atomic layer deposition reaction conditions,the in-situ measurement results of the inorganic film thickness of the atomic layer deposition are used instead of the optical measurement results of the film thickness.It can solve the problem that the thickness of the atomic layer deposited film in various complex chambers cannot be accurately measured.