{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:DMK2QRFPKLZTOW6TBDLZR4BC5P","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"beae704e82332b923e4ff74e193ce1c751741f5e982e2273c52d7b58b2284bfe","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-04-23T18:38:16Z","title_canon_sha256":"96ebec1f3045282281555ce689fd0ebfc9c0f34487afada2cd8f399cdbd9f92a"},"schema_version":"1.0","source":{"id":"2504.17039","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.17039","created_at":"2026-07-05T10:53:21Z"},{"alias_kind":"arxiv_version","alias_value":"2504.17039v1","created_at":"2026-07-05T10:53:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.17039","created_at":"2026-07-05T10:53:21Z"},{"alias_kind":"pith_short_12","alias_value":"DMK2QRFPKLZT","created_at":"2026-07-05T10:53:21Z"},{"alias_kind":"pith_short_16","alias_value":"DMK2QRFPKLZTOW6T","created_at":"2026-07-05T10:53:21Z"},{"alias_kind":"pith_short_8","alias_value":"DMK2QRFP","created_at":"2026-07-05T10:53:21Z"}],"graph_snapshots":[{"event_id":"sha256:01b04fe23f02302d44403a0c6fd0d5b41cb0945be5d84960299e3a88993777af","target":"graph","created_at":"2026-07-05T10:53:21Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2504.17039/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper addresses the critical environmental challenge of estimating ambient Nitrogen Dioxide (NO$_2$) concentrations, a key issue in public health and environmental policy. Existing methods for satellite-based air pollution estimation model the relationship between satellite and in-situ measurements at select point locations. While these approaches have advanced our ability to provide air quality estimations on a global scale, they come with inherent limitations. The most notable limitation is the computational intensity required for generating comprehensive estimates over extensive areas.","authors_text":"Damian Borth, Linus Scheibenreif, Ruben Gonzalez Avil\\'es","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-04-23T18:38:16Z","title":"Dense Air Pollution Estimation from Sparse in-situ Measurements and Satellite Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.17039","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ef08419b4966dcced25bc52b39e920ae925317530134f3f0e794f4b1af0b9df0","target":"record","created_at":"2026-07-05T10:53:21Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"beae704e82332b923e4ff74e193ce1c751741f5e982e2273c52d7b58b2284bfe","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-04-23T18:38:16Z","title_canon_sha256":"96ebec1f3045282281555ce689fd0ebfc9c0f34487afada2cd8f399cdbd9f92a"},"schema_version":"1.0","source":{"id":"2504.17039","kind":"arxiv","version":1}},"canonical_sha256":"1b15a844af52f3375bd308d798f022ebed314d64aacefc4647d2143c8bab7fef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b15a844af52f3375bd308d798f022ebed314d64aacefc4647d2143c8bab7fef","first_computed_at":"2026-07-05T10:53:21.093893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:53:21.093893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hQi7SmYOtyKWuEUCSLUt4EuysOnkC/bKPH11KtXQUjSdwJXwPkBK1a1Fn5r2tdQcTIK+aWdfVIxecnGQXEH5DA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:53:21.094402Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.17039","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ef08419b4966dcced25bc52b39e920ae925317530134f3f0e794f4b1af0b9df0","sha256:01b04fe23f02302d44403a0c6fd0d5b41cb0945be5d84960299e3a88993777af"],"state_sha256":"222273f610084ce40a461314586c8e34c5589e0f04a35ede299c83d911750385"}