| 一种精确估计区域北斗接收机硬件延迟的方法 |
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| 引用本文： | 李昕,郭际明,周吕,覃发超.一种精确估计区域北斗接收机硬件延迟的方法[J].测绘学报,2016,45(8):929-934. |
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| 作者姓名： | 李昕 郭际明 周吕 覃发超 |
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| 作者单位： | 1. 武汉大学测绘学院, 湖北 武汉 430079;2. 桂林理工大学广西空间信息与测绘重点实验室, 广西 桂林 541004;3. 西华师范大学国土资源学院, 四川 南充 637000 |
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| 基金项目： | Mapping and Geoinformation(PF2013-10)，Guangxi Space Information and Mapping Key Laboratory of Funding Issues (No．15-140-07-32)@@@@国家自然科学基金(41474004)，精密工程与工业测量国家测绘地理信息局重点实验室开放基金(PF2013-10)，广西空间信息与测绘重点实验室资助课题(15-140-07-32) |
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| 摘 要： | 提出了一种精确估计区域北斗接收机硬件延迟(DCB)的方法。该方法不需要传统复杂的电离层模型,在已知一个参考站接收机硬件延迟的条件下,利用正常情况下电离层延迟量和卫星-接收机几何距离强相关这一特点,采用站间单差法来精确估计区域内BDS接收机的硬件延迟。试验结果表明,该方法单站估计的单站北斗接收机连续30d的硬件延迟RMS在0.3ns左右。通过GEO卫星双频观测值扣除已知卫星DCB和本文方法估计的接收机DCB,计算对应穿刺点一天的VTEC并和GIM格网内插结果并进行比对分析,二者大小和变化趋势均符合较好,进一步验证了本文提出的方法具有可靠性。
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| 关 键 词： | 北斗 接收机硬件延迟 区域 站间单差 VTEC |
| 收稿时间： | 2016-01-28 |
| 修稿时间： | 2016-04-25 |
An Accurate Method for the BDS Receiver DCB Estimation in a Regional Network |
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| LI Xin,GUO Jiming,ZHOU L,QIN Fachao.An Accurate Method for the BDS Receiver DCB Estimation in a Regional Network[J].Acta Geodaetica et Cartographica Sinica,2016,45(8):929-934. |
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| Authors: | LI Xin GUO Jiming ZHOU L QIN Fachao |
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| Institution: | 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;2. Guangxi Key Laboratory for Spatial Information and Geomatics, Guilin University of Technology, Guilin 5410043, China;3. Land and Resources College, China West Normal University, Nanchong 637000, China |
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| Abstract: | An accurate approach for receiver differential code biases (DCB)estimation is proposed with the BDS data obtained from a regional tracking network.In contrast to the conventional methods for BDS receiver DCB estimation,the proposed method does not require a complicated ionosphere model,as long as one reference station receiver DCB is known.The main idea for this method is that the ionosphere delay is highly dependent on the geometric ranges between the BDS satellite and the receiver normally. Therefore,the non-reference station receivers DCBs in this regional area can be estimated using single difference (SD)with reference stations.The numerical results show that the RMS of these estimated BDS receivers DCBs errors over 30 days are about 0.3 ns.Additionally,after deduction of these estimated receivers DCBs and knowing satellites DCBs,the extractive diurnal VTEC showed a good agreement with the diurnal VTEC gained from the GIM interpolation,indicating the reliability of the estimated receivers DCBs. |
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| Keywords: | BDS receiver DCB regional area SD VTEC |
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