{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PQ6TV56FLYS2NSHIFP6FTRRPSR","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":"69259caf48dcf3cc83d2fd313d539f38b14797794af372bed0ea168cf892d4dc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-10-07T09:45:43Z","title_canon_sha256":"60a7328fff9f2cdacefa218c3735a3162e3e387f1b0801c04aed90708be39b7f"},"schema_version":"1.0","source":{"id":"1810.03116","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.03116","created_at":"2026-05-18T00:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"1810.03116v1","created_at":"2026-05-18T00:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.03116","created_at":"2026-05-18T00:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"PQ6TV56FLYS2","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"PQ6TV56FLYS2NSHI","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"PQ6TV56F","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:f0ae0479f6962cea91b7e658d37c50bbbe4d2fc5c4f046788f81bf4c8f98552e","target":"graph","created_at":"2026-05-18T00:03:54Z","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"},"paper":{"abstract_excerpt":"Existing works have explored the anchor deployment for autonomous underwater vehicles (AUVs) localization under the assumption that the sound propagates straightly underwater at a constant speed. Considering that the underwater acoustic waves propagate along bent curves at varying speeds in practice, it becomes much more challenging to determine a proper anchor deployment configuration. In this paper, taking the practical variability of underwater sound speed into account, we investigate the anchor-AUV geometry problem in a 3-D time-of-flight (ToF) based underwater scenario from the perspectiv","authors_text":"Tao Jiang, Yixin Zhang, Yu Zhang, Yuzhou Li","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-10-07T09:45:43Z","title":"Underwater Anchor-AUV Localization Geometries with an Isogradient Sound Speed Profile: A CRLB-Based Optimality Analysis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.03116","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":"sha256:5022a095647d16586449fe775af111091d5ffa4a6e78a79bf88702bf5ba4fade","target":"record","created_at":"2026-05-18T00:03:54Z","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":"69259caf48dcf3cc83d2fd313d539f38b14797794af372bed0ea168cf892d4dc","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2018-10-07T09:45:43Z","title_canon_sha256":"60a7328fff9f2cdacefa218c3735a3162e3e387f1b0801c04aed90708be39b7f"},"schema_version":"1.0","source":{"id":"1810.03116","kind":"arxiv","version":1}},"canonical_sha256":"7c3d3af7c55e25a6c8e82bfc59c62f9444e2ea54e5df46df591a4649b6620246","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c3d3af7c55e25a6c8e82bfc59c62f9444e2ea54e5df46df591a4649b6620246","first_computed_at":"2026-05-18T00:03:54.479728Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:54.479728Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C6CBT1vbjKKzgUXalhtFRTlWIDSDV5MipxvMpAiJsIKritLUqkL2LEqyyg0TDBSOcZ57DFyaKT9lENOltRkgBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:54.480414Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.03116","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5022a095647d16586449fe775af111091d5ffa4a6e78a79bf88702bf5ba4fade","sha256:f0ae0479f6962cea91b7e658d37c50bbbe4d2fc5c4f046788f81bf4c8f98552e"],"state_sha256":"ca6ddd5f2a951af872925db209989209d1531cf312588146230ef29057f56cab"}