Time interval measurement has been widely used in many areas, such as navigation and positioning, aerospace, communications, electronics, astronomy, metrology, electronic technology.
时间间隔测量在导航定位、航空航天、通讯、电子仪器、天文、计量、电子技术等众多领域有着广泛的应用。
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Summary: Pocket Stars is an astronomy application featuring an integrated star chart, ephemeris, and celestial navigation calculator.