想做SAR与光学图像对齐研究？这个数据集用Umbra的VHR数据做了精细对齐，还带文本描述，直接拿去做多模态训练或评测。
SARLO-80是一个基于Umbra卫星VHR SAR SLC数据构建的SAR-光学-文本对齐数据集，包含约2500个全球场景，覆盖72个国家257个地点。所有SAR数据被标准化为80cm斜距网格，并切分为1024×1024像素图块，与对应的高分辨率光学图像精确对齐。数据集提供119,566个三元组（幅度/复数SAR图块、对齐光学图块、三种长度的自然语言描述），支持跨模态检索和条件生成等基准测试。完整代码和划分已开源在Hugging Face Hub。
SARLO-80: Worldwide Slant SAR Language Optic Dataset 80cm
Multimodal foundation models have advanced rapidly thanks to large optical benchmarks, but comparable resources for synthetic aperture radar (SAR) remain limited. Existing SAR--optical datasets largely rely on low-resolution, intensity-only Ground Range Detected~(GRD) products and do not preserve complex-valued SAR measurements or native acquisition geometry, which restricts physically grounded multimodal learning. In particular, large-scale public datasets combining very-high-resolution (VHR) SAR SLC, aligned optical imagery, and natural-language descriptions are still lacking. We present a VHR SAR--optical--text dataset built from open-access Umbra spotlight acquisitions distributed as Sensor Independent Complex Data (SICD). From around 2,500 worldwide scenes (VV/HH, 20cm--2m native resolution), we standardize all SAR data to an 80cm slant-range grid via band-limited FFT resampling and tile the imagery into 1024 by 1024 patches. For each SAR patch, we retrieve a high-resolution optical tile and warp it into the SAR grid using local coordinate correspondences for local pixel-level alignment. We further generate three caption variants (SHORT/MID/LONG) per sample to support vision--language training and evaluation. Our dataset contains 119,566 triplets (complex and amplitude slant-range SAR patch, aligned optical patch, natural-language description) covering 257 locations across 72 countries and a broad range of land types and infrastructures. We release fixed train/validation/test splits and the full preprocessing and baseline code to enable reproducible benchmarks for multimodal alignment on cross-modal retrieval and conditional generation in native SAR geometry. The dataset is publicly available on the Hugging Face Hub at https://huggingface.co/datasets/ONERA/SARLO-80.