| GNSS-R/IR监测地表冻融状态对延迟多普勒波形和多路径数据影响分析 | |
| Alternative Title | Theoretical analysis of soil freeze/thaw process on DDM waveform and multipath in order for GNSS-R/IR applications |
| 吴学睿; 夏俊明; 白伟华; 张兴刚 | |
| Department | 空间环境部 |
| Source Publication | 测绘学报
 |
| 2019 | |
| Volume | 48Issue:8Pages:1059-1066 |
| DOI | 10.11947/j.AGCS.2019.20180038 |
| ISSN | 1001-1595 |
| Language | 中文 |
| Keyword | GNSS-R/IR 冻融地表 延迟多普勒图 多路径 双站全极化 |
| Abstract | 将GNSS-R/IR技术的应用领域拓展到地表冻融状态的监测中，本文利用冻融土混合介质介电常数模型计算土壤介电常数，采用双站全极化相干反射率模型和随机粗糙面散射模型，分别计算了经冻融土反射的GPS相干反射量的镜像反射率，以及GPS非相干反射分量的漫散射特性。模拟分析了冻融转换时，GPS多路径信息（GNSS-IR）以及包含漫散射信号的延迟多普勒图（GNSS-R）的变化特征。理论研究表明冻融转换过程中，地表介电常数的变化导致GPS多路径信息和延迟多普勒图的明显变化。本文从散射机理上揭示了利用GNSS-R和GNSS-IR遥感进行地表冻融特性监测的理论依据。 |
| Other Abstract | In order to extend the applications GNSS-R/IR(GNSS-reflectometry/interferometric reflectometry) remote sensing technique to soil freeze/thaw process detection, soil(frozen/thawn) mixing permittivity models are employed to calculate the soil permittivity. Bistatic full-polarization coherent scattering model and random roughness surface scattering model are used to calculate the coherent and non-coherent scattering, which result in the variations of GPS multipath observables and DDM(delay Doppler map) waveforms, respectively. When the soil freeze/thaw process occurs, theoretical simulations indicate that soil freeze/thaw process induce the abrupt permittivity changes and affect the obvious variations of GNSS-R/IR signals. In this way, theoretical fundamentals for soil freeze/thaw process detections are presented. © 2019, Surveying and Mapping Press. All right reserved. |
| Indexed By | EI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/7237 |
| Collection | 空间环境部 |
| Recommended Citation GB/T 7714 | 吴学睿,夏俊明,白伟华,等. GNSS-R/IR监测地表冻融状态对延迟多普勒波形和多路径数据影响分析[J]. 测绘学报,2019,48(8):1059-1066. |
| APA | 吴学睿,夏俊明,白伟华,&张兴刚.(2019).GNSS-R/IR监测地表冻融状态对延迟多普勒波形和多路径数据影响分析.测绘学报,48(8),1059-1066. |
| MLA | 吴学睿,et al."GNSS-R/IR监测地表冻融状态对延迟多普勒波形和多路径数据影响分析".测绘学报 48.8(2019):1059-1066. |
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| 20194881059-1066.pdf（2079KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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