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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Analyzing the Satellite-Induced Code Bias Variation Characteristics for the BDS-3 Via a 40 m Dish Antenna
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Analyzing the Satellite-Induced Code Bias Variation Characteristics for the BDS-3 Via a 40 m Dish Antenna

机译：通过40 m碟形天线分析BDS-3的卫星感应代码偏差变化特性

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The satellite-induced code bias variation of geostationary satellite orbit satellites and medium earth orbit satellites of the second-generation BeiDou Navigation Satellite System (BDS-2) exceeds 1 m, which severely affects the accuracy and stability of the ambiguity resolution and high-precision positioning. With the development of the third-generation BDS (BDS-3) with a new system design and new technology, analysis of the satellite-induced code variation characteristics of BDS-3 has become increasingly important. At present, many scholars have explored the satellite-induced code bias of BDS-3, but most of them focus on BDS-3 experimental satellites via normal geodetic antenna. Compared to normal geodetic antenna, the 40-m dish antenna from the National Time Service Center can accurately detect satellite-induced code variations with low noise and high gain. Thus, observational data from fifteen BDS-3 medium earth orbit satellites are collected with the B1I/B2b/B3I/B1C/B2a frequency bands on the day of year (DOY) 199–206 in 2019, the PRN numbers of which are C19/C20/C21/C22/C23/C24/C25/C26/C27/C28/C30/C32/C33 /C35/C37, via the 40 m dish antenna to analyze the code bias variation characteristics. The results show that the obvious satellite-induced elevation‑dependent code bias variations exist in the B1I/B2b/B3I/B1C/B2a frequency bands of C28, compared with other satellites. Similarly, the multipath (MP) combination of B3I has an obvious elevation‑dependent variation within a range of 0.1 m for C21/C24/C27/C28/C37 and elevation‑dependent variation of the B2a and B2b frequency bands also exists in most satellites with a range of 0.1 m. However, the MP combination values of some satellites are asymmetric with respect to elevation, which is different from BDS-2 satellites and especially obvious for BDS-3 satellites B1I and BIC frequency bands with elevation‑dependent variations of 0.2 m, indicating that the code bias variation is not uniquely related to elevation, especially for the B1I/BIC frequency bands. What’s more, the satellite-induced code bias variation of the BDS-3 satellites is greatly reduced compared with that of the BDS-2 satellites. In addition, the similar code bias variation appears at the Xia1 station with a normal geodetic antenna of B1I/B1C/B3I/B2a/B2b of C21, B3I/B2a/B2b of C24 and B2b of C28 among B1I/B1C/B3I/B2a/B2b of C21/C24/C27/C28/C37. The influence of the BDS-3 satellite-induced elevation‑dependent code bias on precision positioning and ambiguity fixing is worth further study using different antennas or receivers.
机译：第二代北斗导航卫星系统（BDS-2）的对地静止卫星轨道卫星和中地球轨道卫星的卫星引起的代码偏差变化超过1 m，这严重影响了歧义分辨率和高精度的准确性和稳定性。定位。随着具有新系统设计和新技术的第三代BDS（BDS-3）的发展，对BDS-3的卫星感应代码变化特性的分析变得越来越重要。目前，许多学者已经探索了BDS-3的卫星引起的代码偏差，但其中大多数集中在通过大地测量天线的BDS-3实验卫星上。与普通的大地天线相比，美国国家时间服务中心的40米碟形天线可以以低噪声和高增益准确检测出卫星引起的代码变化。因此，在2019年（DOY）199-206的B1I / B2b / B3I / B1C / B2a频段收集了15颗BDS-3中地球轨道卫星的观测数据，其PRN编号为C19 / C40 / C21 / C22 / C23 / C24 / C25 / C26 / C27 / C28 / C30 / C32 / C33 / C35 / C37，通过40 m碟形天线分析代码偏置变化特性。结果表明，与其他卫星相比，在C28的B1I / B2b / B3I / B1C / B2a频带中存在明显的卫星诱发的仰角相关代码偏差变化。同样，对于C21 / C24 / C27 / C28 / C37，B3I的多径（MP）组合在0.1 m范围内具有明显的仰角相关变化，并且大多数卫星中也存在B2a和B2b频带的仰角相关变化范围为0.1 m。但是，某些卫星的MP组合值在高度上是不对称的，这与BDS-2卫星不同，尤其是对于BDS-3卫星B1I和BIC频带，其仰角变化为0.2 m，表明代码偏差变化与海拔并不是唯一相关的，尤其是对于B1I / BIC频段。而且，与BDS-2卫星相比，BDS-3卫星的卫星引起的代码偏差变化大大降低。此外，在Xia1站出现类似的代码偏差变化，其中B1I / B1C / B3I / B2a中的大地天线为C21的B1I / B1C / B3I / B2a / B2b，C24的B3I / B2a / B2b和C28的B2b C21 / C24 / C27 / C28 / C37的/ B2b。 BDS-3卫星引起的仰角相关的代码偏差对精确定位和歧义性的影响值得使用不同的天线或接收机进行进一步研究。

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