Maya4: a Novel Large-Scale Multi-Level SAR Representation Dataset for Machine Learning

Kurzfassung

Maya4 is a cloud-native Sentinel-1 Stripmap SAR dataset that exposes four aligned processing states: raw, rc, rcmc, and focused az. Unlike existing public resources limited to focused imagery, Maya4 exposes the signal chain from Level-0 echoes to focused products, enabling operator-level learning and evaluation. The release con- tains about 2 TB of data with chunked/sharded storage and co-located metadata for scalable access. Maya4 sup- ports three broad classes of signal-domain use cases: compression, learned focusing, and cross-level representa- tion learning, together with benchmarking against conventional processors. The dataset is publicly available at https://huggingface.co/buckets/ESA-philab/Maya4.