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Performance analysis of GNSS units in manned helicopter operations

机译:GNSS单元在载人直升机操作中的性能分析

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Global Navigation Satellite System (GNSS) receivers make use of the United States' Global Positioning System (GPS), Russia's Global Navigation Satellite System (GLONASS), Europe's Galileo, China's Beidou, and Japan's Quasi-Zenith Satellite System constellations to determine the geolocation of the receiver based on the location of satellites and measurements of the distance and travel time of the GNSS signals. GNSS signals are dependent on line of sight to satellites with reflections or obstructions resulting in errors in the estimated position [1]. GNSS systems, while having their origin in military applications [2], have been adopted for many civilian uses from recreational navigation [3] to automated vehicle location systems [4]. While the GPS Standard Positioning Service without any correction sources establishes a 30 m range error limit for civilian use, GPS receivers typically perform better than this standard with errors primarily from atmospheric interference [5]. This is further improved in mobile devices by assisted GPS, WiFi, and cellular positioning when available [6].
机译:全球导航卫星系统(GNSS)接收机利用美国的全球定位系统(GPS),俄罗斯的全球导航卫星系统(GLONASS),欧洲的伽利略,中国的北斗和日本的准天顶卫星系统星座来确定卫星的地理位置根据卫星的位置以及GNSS信号的距离和传播时间的测量结果确定接收器。 GNSS信号取决于卫星的视线,这些卫星会反射或遮挡卫星,导致估计位置出现误差[1]。 GNSS系统虽然起源于军事应用[2],但已被广泛用于从娱乐导航[3]到自动车辆定位系统[4]的许多民用用途。尽管没有任何校正源的GPS标准定位服务为民用设置了30 m的范围误差极限,但GPS接收器的性能通常优于该标准,主要是由于大气干扰引起的误差[5]。在移动设备中,通过辅助GPS,WiFi和蜂窝定位(如果可用)可以进一步改善[6]。

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