{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:AIUBHZ4DUW3WHLAV57WVN6OZ3R","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":"0ac056a9da0262e450f98b34836826b82770bea69d6cbb322de099b70e12577b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-10-19T09:31:09Z","title_canon_sha256":"0bccefd234cf927f424f1faccd5be5aa0affe34aa7887f85e3f940da4039c455"},"schema_version":"1.0","source":{"id":"1710.07052","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.07052","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"arxiv_version","alias_value":"1710.07052v1","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.07052","created_at":"2026-05-18T00:32:27Z"},{"alias_kind":"pith_short_12","alias_value":"AIUBHZ4DUW3W","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"AIUBHZ4DUW3WHLAV","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"AIUBHZ4D","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:5d798b0f5f89bd2fd2a040bcef530ed942b7a410908b8f914093b636c4d7c860","target":"graph","created_at":"2026-05-18T00:32:27Z","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":"In this paper, a positioning technique based on Time Difference of Arrival (TDoA) measurements is analyzed. The proposed approach is designed to consent range and position estimation, using ultrasound transmissions of a stream of chirp pulses, received by a set of wireless nodes. A potential source of inaccuracy introduced by lack of synchronization between transmitting node and receiving nodes is identified and characterized. An algorithm to identify and correct such inaccuracies is presented.","authors_text":"Alessio De Angelis, Antonella Comuniello, Antonio Moschitta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-10-19T09:31:09Z","title":"TDoA Based Positioning using Ultrasound Signals and Wireless Nodes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.07052","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":"sha256:0871de8990c3fb4d463ffb80e62a9f4ea66d7215e1b7e41148d4f0afbe8d7cb7","target":"record","created_at":"2026-05-18T00:32:27Z","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":"0ac056a9da0262e450f98b34836826b82770bea69d6cbb322de099b70e12577b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2017-10-19T09:31:09Z","title_canon_sha256":"0bccefd234cf927f424f1faccd5be5aa0affe34aa7887f85e3f940da4039c455"},"schema_version":"1.0","source":{"id":"1710.07052","kind":"arxiv","version":1}},"canonical_sha256":"022813e783a5b763ac15efed56f9d9dc6ee84913e67b00c5932d6e536639040b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"022813e783a5b763ac15efed56f9d9dc6ee84913e67b00c5932d6e536639040b","first_computed_at":"2026-05-18T00:32:27.193362Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:27.193362Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iZtzwgOlppnXMsronjWyZleSiG2EQo3k2tWVbENQPuAfgSt32QH9o6lLuiVqo9NRaZFEddB7v5dYChFX4LHZBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:27.193963Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.07052","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0871de8990c3fb4d463ffb80e62a9f4ea66d7215e1b7e41148d4f0afbe8d7cb7","sha256:5d798b0f5f89bd2fd2a040bcef530ed942b7a410908b8f914093b636c4d7c860"],"state_sha256":"a393a5967acbcd85b7cde2bfbce6fa4cdd86b8179234661df5213017ca98d5fd"}