延安地区地面极化探地雷达实测科学数据，旨在进行小范围的精细探测。探地雷达中心频率100MHz，采样时窗设置为100ns。根据雷达数据中记录的GPS数据，得到了地面多极化探地雷达探测路线图，其主要位于一处滑坡体上，滑坡体上能观察到一些落水洞。对实验中采集到的HH极化通道、HV极化通道、及VV极化通道原始数据，设计了包含背景去除、增益、带通滤波的数据处理流程。可见HH及VV通道中地面反射能量较强，HV通道能量较弱，但HV通道的穿透能力更强，可探测更深的地下结构，探测深度可达10m以上。浅部的强散射能量均在地表附近找到了落水洞，但在地表上无法确定落水洞的地下规模和结构，探地雷达剖面中可以看到落水洞在地下延申的深度不同，结构规模也不同。不同的落水洞深度、规模和结构对于评估其危害有重要作用。
", "ds_source": "数据来源于延安市安塞区湫滩，采用100MHz全极化探地雷达进行黄土滑坡地下结构非破坏性探测，用于识别黄土滑坡地下落水洞、裂隙等结构，采样时窗设置为100ns，全过程严格遵守设备维护和操作规范，所有数据均按标准格式存档备份，确保数据的完整性、准确性和可追溯性，有效支撑后续地下结构分析和科研应用。
", "ds_process_way": "通过软件进行背景去除、增益、带通滤波的数据处理，从而完成实际图像的呈现。
", "ds_quality": "为了确定地下结构的真实性，在同一测线上进行了高密度电法测量，取相同一段穿透能力最强的HV通道数据，两者对比。探地雷达HV通道数据中的地层界面与高密度电法反演结果中高、低阻界面对应较好，证实了探地雷达HV通道数据中观察到的地下结构是来自黄土体地下结构，浅部结构的高阻特性也与落水洞的特征相吻合。此外，结果也证实了所探测到的深部地下结构的真实性，结果表明该多极化探地雷达在黄土地区能探测地下落水洞的结构，并且其探测深度能达到10m。
", "ds_acq_start_time": "2024-08-12 00:00:00", "ds_acq_end_time": "2024-08-13 00:00:00", "ds_acq_place": "延安市安塞区", "ds_acq_lon_east": 109.43833333333333, "ds_acq_lat_south": 36.5125, "ds_acq_lon_west": 108.86222222222221, "ds_acq_lat_north": 37.32527777777778, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 442034428, "ds_files_count": 0, "ds_format": "*.zry", "ds_space_res": "", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "3fad05bd-9dee-41fb-a1bf-49a721fcf3ee.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": "", "organization_id": "bf138922-7121-438c-8d1b-19d5f751c907", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.2540" ], "quality_level": 0, "publish_time": "2026-05-21 17:44:34", "last_updated": "2026-05-21 17:44:34", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.loess.db7346.2026", "i18n": { "en": { "title": "Scientific Data from Ground-Based Polarimetric Ground-Penetrating Radar Measurements in Yan'an Region", "ds_format": "*.zry", "ds_source": "The data were collected from the Qiu Tan area in Ansai District, Yan'an City. A 100 MHz fully polarimetric ground-penetrating radar (GPR) was used to conduct non‑destructive subsurface detection of loess landslides, aiming to identify underground features such as sinkholes and fractures. The sampling time window was set to 100 ns. Throughout the operation, equipment maintenance and operational protocols were strictly followed. All data were archived and backed up in standard formats to ensure integrity, accuracy, and traceability, thereby effectively supporting subsequent subsurface structural analysis and scientific research applications.", "ds_quality": "
To verify the authenticity of subsurface structures, high-density electrical resistivity tomography (ERT) measurements were conducted along the same survey line and compared with a segment of the HV-channel data exhibiting the strongest penetration capability. The stratigraphic interfaces observed in the GPR HV-channel data correspond well with the high- and low-resistivity boundaries derived from the ERT inversion results, confirming that the subsurface structures identified in the GPR HV-channel data originate from the loess mass. The high-resistivity characteristics observed in shallow structures are also consistent with the typical features of sinkholes. Furthermore, the results validate the existence of the deep subsurface structures detected, demonstrating that this polarimetric GPR system is capable of imaging sinkhole structures in loess areas with a detection depth reaching up to 10 m.", "ds_ref_way": "", "ds_abstract": "
Scientific Data from Ground-Based Polarimetric Ground-Penetrating Radar Measurements in Yan'an Region aim to conduct small-scale, high-precision detection. The GPR system operates at a center frequency of 100 MHz with a sampling time window set to 100 ns. Based on the GPS data recorded in the radar dataset, a survey route map for the ground-based polarimetric GPR was generated, primarily covering a landslide mass where several sinkholes are visible on the surface. For the raw data collected from the HH, HV, and VV polarization channels during the experiment, a data processing workflow was designed, including background removal, gain adjustment, and band-pass filtering. The results show that the ground-reflected energy is strong in the HH and VV channels, while weaker in the HV channel. However, the HV channel exhibits greater penetration capability, enabling detection of deeper subsurface structures with a penetration depth exceeding 10 m. Strong scattering signals in the shallow subsurface correspond to sinkholes near the surface, though their underground extent and structure cannot be determined from surface observations alone. In the GPR profiles, the sinkholes are seen to extend to varying depths and exhibit different structural scales. The depth, scale, and structure of these sinkholes play a critical role in assessing their potential hazards.", "ds_time_res": "", "ds_acq_place": "Ansai District, Yan'an City", "ds_space_res": "", "ds_projection": "", "ds_process_way": "
Software-based data processing was conducted through background removal, gain adjustment, band‑pass filtering,thereby achieving the visualization of practical images.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "探地雷达", "全极化", "matlab" ], "ds_subject_tags": [ "空间物理探测" ], "ds_class_tags": [], "ds_locus_tags": [ "延安市安塞区" ], "ds_time_tags": [ 2024 ], "ds_contributors": [ { "true_name": "冯晅", "email": "fengxuan@jlu.edu.cn", "work_for": "吉林大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "冯晅", "email": "fengxuan@jlu.edu.cn", "work_for": "吉林大学", "country": "中国" } ], "ds_managers": [ { "true_name": "冯晅", "email": "fengxuan@jlu.edu.cn", "work_for": "吉林大学", "country": "中国" } ], "category": "其他" }