一种地基GNSS接收机差分码偏差估算方法

周中华; 万祥; 程艳; 刘志忠; 汪文君; 张雪丽

doi:10.11728/cjss2022.01.201026096

一种地基GNSS接收机差分码偏差估算方法

doi: 10.11728/cjss2022.01.201026096

航天恒星科技有限公司　北京　100194

基金项目: 国家民用空间基础设施“十二五”陆地观测卫星地面系统建设项目资助

详细信息

作者简介:
程艳：E-mail: chengyan_nuc@163.com

中图分类号: P352
计量
- 文章访问数: 409
- HTML全文浏览量: 135
- PDF下载量: 27
- 被引次数: 0
出版历程
- 收稿日期: 2020-10-23
- 录用日期: 2021-08-10
- 修回日期: 2021-11-04
- 网络出版日期: 2022-05-25

A Method for Estimating Differential Code Deviation of Ground-based GNSS Receiver

Space Star Technology Company Limited, Beijing 100194

摘要

摘要:
GNSS不同频点间的码伪距作差会引入信号的差分码偏差（DCB），包括GNSS卫星及地面接收机的DCB。本文提出一种地基GNSS接收机差分码偏差参数估算方法，首先由电离层文件参数作线性插值，计算出电离层延迟误差。之后对IGS站观测文件进行加权最小二乘法估计，得到GPS卫星和地面GNSS接收机的L1C频点和L2P频点间码偏差。该方法能同时获取卫星DCBs与地面GNSS接收机的DCBr，有效解决地面GNSS接收机DCBr获取的问题。通过对估计的卫星DCBs与CODE公布的值进行对比和统计分析，结果表明，两者卫星DCBs（C1P2）之差的RMS均值误差 < 0.3541 ns，地基GNSS接收机DCBr（C1P2）估算精度优于1.6105 ns。
- 差分码偏差 /
- 卫星DCBs /
- 接收机的DCBr /
- 参数估算
Abstract:
The difference of code pseudo-range between different frequency points of GNSS will lead to the DCB of the signal. The DCB of GNSS satellite and ground receiver can cause an accuracy error of about 25 ns, which must be corrected. Against to this problem, this paper proposes a differential code deviation estimation method for ground-based GNSS receivers. This method can obtain the DCBr of ground GNSS receiver and satellite DCBs at the same time, and effectively solve the problem of ground GNSS receiver DCBr acquisition. Through the comparison and statistical analysis of the estimated satellite DCBs and the values published by code, the results show that the RMS mean error of the difference between the two satellites DCBs (C1P2) is less than 0.3541 ns, and the estimation accuracy of ground-based GNSS receiver DCBr (C1P2) is better than 1.6105 ns.
- Differential code bias /
- satellite DCBs /
- receiver DCBr /
- Parameter estimation

HTML全文

图 1 DCB算法流程

Figure 1. Flow chart of DCB algorithm

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图 2 CODE中心下载的2015年3月DCB数据

Figure 2. DCB data for March 2015 downloaded from CODE Center

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图 3 CODE中心下载的2015年4月DCB数据

Figure 3. DCB data for April 2015 downloaded from CODE Center

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图 4 估算的2015年3月卫星C1P2 DCB

Figure 4. Estimated satellite C1P2 DCB in March 2015

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图 5 估算的2015年4月卫星C1P2 DCB

Figure 5. Estimated satellite C1P2 DCB in April 2015

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图 6 2015年3月CODE公布与估算的C1P2码偏差对比

Figure 6. Comparison of the deviation between the CODE published in March 2015 and the estimated C1P2 code

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图 7 2015年4月CODE公布与估算的C1P2码偏差对比

Figure 7. Comparison of the deviation between the CODE published in April 2015 and the estimated C1P2 code

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图 8 2015年3月和4月估算的卫星C1P2 DCB RMS误差

Figure 8. Estimated Star C1P2 DCB RMS error in March and April 2015

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图 9 2015年3和4月估算的测站C1P2 DCBr误差

Figure 9. Estimated Station C1P2 DCBr error in March and April 2015

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表 1 估算的2015年3月20个IGS站接收机码偏差值（单位 ns）

Table 1. Calculated receiver DCB for 20 IGS stations in March 2015 (Unit ns)

IGS站名	abpo	albh	alg3	baie	barh	bcov	bjco	cas1	eliz	escu
DCBr	–4.2823	11.1878	13.2729	9.1391	6.4724	5.8010	–12.6882	–7.6900	2.7586	–14.9059

IGS站名	eur2	ganp	geno	gldr	glps	godz	guam	kiru	tid1	wes2
DCBr	11.4201	–8.6954	21.420	4.6395	–0.5536	0.2306	6.1477	7.1547	–21.4409	11.0222

下载: 导出CSV

表 2 估算的2015年4月20个IGS站接收机码偏差值（单位 ns）

Table 2. Calculated receiver DCB for 20 IGS stations in April 2015 (Unit ns)

IGS站名	abpo	albh	alg3	baie	barh	bcov	bjco	cas1	eliz	escu
DCBr	–5.0597	11.0122	13.0821	9.0508	6.2674	5.9221	–13.2754	–8.0336	2.7610	–15.0996

IGS站名	eur2	ganp	geno	gldr	glps	godz	guam	kiru	tid1	wes2
DCBr	11.4382	–8.9486	21.4702	4.9973	–0.6551	0.1525	7.0748	7.0906	–21.5858	11.1649

下载: 导出CSV

表 3 下载的2015年3和4月6个IGS站接收机码偏差值（单位 ns）

Table 3. Download receiver DCBr for 6 IGS stations in March and April 2015 (Unit ns)

IGS站名		abpo	bjco	ganp	glps	tid1	godz
3月	P1 P2	–5.628	–14.647	–10.175	–1.804	–22.974	–2.234
	P1 C1	–0.113	–3.289	–3.368	–0.385	–2.656	–1.175
	C1 P2	–5.515	–11.358	–6.807	–1.419	–20.318	–1.059
4月	P1 P2	–5.894	–14.681	–9.989	–1.871	–22.917	–2.042
	P1 C1	0.180	–3.363	–3.472	0.442	–2.660	–1.101
	C1 P2	–6.074	–11.318	–6.517	–2.313	–20.257	–0.941

下载: 导出CSV

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