GIST：利用GPS地面和LEO数据和机会源的全球电离层层析成像工具及其在仪器校准中的应用
GIST: A tool for Global Ionospheric Tomography using GPS ground and LEO d ata and sources of opportunity with applications in instrument calibration
摘要：
利用GPS数据进行电离层层析成像已有文献报道，甚至在最近的工作中成功地应用于雷达高度计校准。我们在这里提出了一个新的软件工具，称为全球电离层随机层析成像软件（GIST），其强大的能力，从不同的来源（地面站，接收器上的低地球轨道导航和掩星的目的）和其他数据，如测高数据，以产生全球地图与密集的覆盖面和固有的仪器校准。我们得到的结果，包括106 IGS地面站，GPS/MET低速率掩星数据，TOPEX/POSEIDON GPS数据从导航天线和NASA雷达高度计与NRA偏差的直接估计的额外好处。将不同类型的电离层数据嵌入层析成像模型的可能性，为直接应用于单频仪器校准精确监测电离层提供了一种方法。
英文摘要：
Ionospheric tomography using GPS data has been reported in the literature and even the application to radar altimeter calibration was succesfully carried out in a recent work. We here present a new software tool, called Global Ionospheric Stochastic Tomography software (GIST), and its powerful capability for ingesting GPS data from different sources (ground stations, receivers on board LEO for navigation and occultation purposes) and other data such as altimetry data to yield global maps with dense coverage and inherent calibration of the instruments. We show results obtained including 106 IGS ground stations, GPS/MET low rate occultation data, TOPEX/POSEIDON GPS data from the navigation antenna and NASA Radar Altimeter with the additional benefit of a direct estimation of the NRA bias. The possibility of ingesting different kinds of ionospheric data into the tomographic model suggest a way to accurately monitor the ionosphere with direct application to single frequency instrument calibration.
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