Ground deformation products for the 7 January 2025 Mw 7.1 Tibet earthquake computed from Sentinel-1 Synthetic Aperture Radar data.

Ground deformation products for the 7 January 2025 Mw 7.1 Tibet earthquake computed from Sentinel-1 Synthetic Aperture Radar data. InSAR and Speckle Range Offsets data • Sentinel-1_track012 • Sentinel-1_track048 • Sentinel-1_track121 *disp.geo.tif – Line-of-Sight Displacement (measured in meters) *wrp.geo.tif – Wrapped phase (measured in radians) *cc.geo.tif – Coherence *.spo_range.geo.tif - Raw Range Offsets (measured in meters) *.spo_snr.geo.tif - Signal-to-Noise Ratio (can be used to remove noisy pixels) *.spo_range.geo_cleaned.tif - Post-Processed Range Offsets (measured in meters) Post-processing filters applied: • Pixels with SNR<8 are removed • Pixels with abs(range)>2 are removed Different filtering parameters can be applied if needed. Azimuth Offsets do not show measurable deformation and are not provided. Files Produced with GAMMA look_vector command (measured in radians): *.lv_theta.geo.tif - SAR look vector elevation angle measured between the surface and the look vector pointing at the radar at each map pixel (lv_theta: PI/2 -> up; -PI/2 -> down) *.lv_phi.geo.tif - SAR look vector orientation angle at each map pixel: (lv_phi: 0 -> East; PI/2 -> North) *.qc – text file with various information about processing options and baselines. Please consult the metadata of the GeoTiff files for details regarding the limitation of liability.本数据集为2025年1月7日西藏Mw7.1级地震的地表形变产品，基于Sentinel-1合成孔径雷达（Synthetic Aperture Radar，SAR）数据计算生成。 干涉合成孔径雷达（InSAR）与斑点测距偏移数据集 • Sentinel-1轨道012 • Sentinel-1轨道048 • Sentinel-1轨道121 *disp.geo.tif：视线向位移（单位：米） *wrp.geo.tif：缠绕相位（单位：弧度） *cc.geo.tif：相干性 *.spo_range.geo.tif：原始测距偏移量（单位：米） *.spo_snr.geo.tif：信噪比（可用于滤除噪声像素） *.spo_range.geo_cleaned.tif：后处理后的测距偏移量（单位：米） 应用的后处理滤波规则如下： • 移除信噪比小于8的像素 • 移除测距偏移量绝对值大于2的像素 若有需求，可采用不同的滤波参数。 方位向偏移未显示可观测到的形变，故未提供该类数据。 采用GAMMA软件look_vector命令生成的文件（单位：弧度）： *.lv_theta.geo.tif：SAR视线俯仰角，即每个地图像素处地表指向雷达的视线矢量与地表平面的夹角（lv_theta为π/2时表示朝上，为-π/2时表示朝下） *.lv_phi.geo.tif：SAR视线方位角，即每个地图像素处的视线矢量方位角（lv_phi为0时指向东，为π/2时指向北） *.qc：文本文件，包含处理参数与基线相关的各类信息。 有关责任限制的详细信息，请查阅GeoTiff文件的元数据。