{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:CVZ5ESKGGTMM5F4RBRA22U7KNI","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":"2c982f4598306f96c3d44027d90d556cef568b42da08d1233a78120dd072e05f","cross_cats_sorted":["cs.LG","physics.ao-ph","stat.AP","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2023-02-20T23:51:33Z","title_canon_sha256":"5f09bb9acc6d07af0b5c6049e380de77d8a341675188095e57a89139ad1a9513"},"schema_version":"1.0","source":{"id":"2302.10364","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10364","created_at":"2026-07-05T07:30:01Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10364v3","created_at":"2026-07-05T07:30:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10364","created_at":"2026-07-05T07:30:01Z"},{"alias_kind":"pith_short_12","alias_value":"CVZ5ESKGGTMM","created_at":"2026-07-05T07:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"CVZ5ESKGGTMM5F4R","created_at":"2026-07-05T07:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"CVZ5ESKG","created_at":"2026-07-05T07:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:3c99d6ded15591060daa7ba34a8eb9c97fdd0cf0e3c14752c417e2d27069d771","target":"graph","created_at":"2026-07-05T07:30:01Z","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/2302.10364/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Given sparse observations of buoy velocities, oceanographers are interested in reconstructing ocean currents away from the buoys and identifying divergences in a current vector field. As a first and modular step, we focus on the time-stationary case - for instance, by restricting to short time periods. Since we expect current velocity to be a continuous but highly non-linear function of spatial location, Gaussian processes (GPs) offer an attractive model. But we show that applying a GP with a standard stationary kernel directly to buoy data can struggle at both current reconstruction and diver","authors_text":"Brian L. Trippe, David R. Burt, Junfei Xia, Kaushik Srinivasan, Renato Berlinghieri, Ryan Giordano, Tamara Broderick, Tamay \\\"Ozg\\\"okmen","cross_cats":["cs.LG","physics.ao-ph","stat.AP","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2023-02-20T23:51:33Z","title":"Gaussian processes at the Helm(holtz): A more fluid model for ocean currents"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10364","kind":"arxiv","version":3},"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":"sha256:575f9209489a834284722bb9d676135c7cf97b63b91b2c10270d27da74a6e882","target":"record","created_at":"2026-07-05T07:30:01Z","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":"2c982f4598306f96c3d44027d90d556cef568b42da08d1233a78120dd072e05f","cross_cats_sorted":["cs.LG","physics.ao-ph","stat.AP","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2023-02-20T23:51:33Z","title_canon_sha256":"5f09bb9acc6d07af0b5c6049e380de77d8a341675188095e57a89139ad1a9513"},"schema_version":"1.0","source":{"id":"2302.10364","kind":"arxiv","version":3}},"canonical_sha256":"1573d2494634d8ce97910c41ad53ea6a1e9e65f224aa0217bab5130005816b2e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1573d2494634d8ce97910c41ad53ea6a1e9e65f224aa0217bab5130005816b2e","first_computed_at":"2026-07-05T07:30:01.932277Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:30:01.932277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xTuSMktFdvvMMHYUnCMBM2ztycdyXR5FGJdnuj+p1hom8Y6bS1Z9iboz/3K0w2++BwQU8sBOQC0D+P12PmEgAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:30:01.932646Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.10364","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:575f9209489a834284722bb9d676135c7cf97b63b91b2c10270d27da74a6e882","sha256:3c99d6ded15591060daa7ba34a8eb9c97fdd0cf0e3c14752c417e2d27069d771"],"state_sha256":"678c3d5f8508295ec35f0559d56ecde0b14cdb8fcb753d70b78c787281094055"}