Characteristics of SBAS grid sizes around the northern crest of the equatorial ionization anomaly
Characteristics of SBAS grid sizes around the northern crest of the equatorial ionization anomaly
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DOI：
10.1016/j.jastp.2011.03.008
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发表时间：
2011-08
影响因子：
1.9
通讯作者：
A. Paul;A. Das;A. Dasgupta
中科院分区：
文献类型：
--
作者：
A. Paul;A. Das;A. Dasgupta
EIA波峰周围的区域占TEC的最高值及其陡峭的梯度，这引入了GPS信号上的高值的距离误差，并降低了SBAS的定位精度。由于TEC梯度在向极侧而不是朝向磁赤道更尖锐，因此EIA波峰两侧的网格大小应该不同。本文件强调了差异网格大小周围的北方波峰的EIA使用的数据记录站在印度SBAS GAGAN在2004年的太阳黑子数适中的必要性。
The region around the crests of the EIA accounts for the highest values of TEC and its steep gradients, which introduces high values of range-errors on GPS signals and degrade the position-fixing accuracy of an SBAS. As the TEC gradient is sharper on the poleward side rather than towards the magnetic equator, grid sizes should be different on either side of the crest of the EIA. The present paper highlights the necessity for a differential grid size around the northern crest of the EIA using data recorded from stations under the Indian SBAS GAGAN during the moderate sunspot number year 2004.