# Principal Investigator and Quality Assessment Reports Evaluate Umbra Synthetic Aperture Radar Data — metered content (Sluice citation toll) # AI agents & crawlers: this content is licensed per use and SETTLED on Arc (USDC) via x402. Resource: Principal Investigator and Quality Assessment Reports Evaluate Umbra Synthetic Aperture Radar Data Author: defaults to feed Content: https://science.nasa.gov/science-research/earth-science/principal-investigator-and-quality-assessment-reports-evaluate-umbra-synthetic-aperture-radar-data/ Unit: per_citation Price: 0.010000 USDC Network: Arc Testnet (eip155:5042002) Toll-Endpoint: https://sluiceflow.vercel.app/gw/paid/721eda-3aa62663 RSL: https://sluiceflow.vercel.app/gw/resources/3b0779aa-ce2d-4db5-a3ee-5eb5fe854835/rsl Badge: https://sluiceflow.vercel.app/gw/badge/3b0779aa-ce2d-4db5-a3ee-5eb5fe854835 # RSL-compatible: declares terms AND points to real settlement (unlike declare-only schemes).