{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:OZYYQD5SJYBI7SMKWJ2FW6IS74","short_pith_number":"pith:OZYYQD5S","schema_version":"1.0","canonical_sha256":"7671880fb24e028fc98ab2745b7912ff3aca87191536284a0e0f7889c9a80a65","source":{"kind":"arxiv","id":"1312.6415","version":2},"attestation_state":"computed","paper":{"title":"Measurement Analysis and Channel Modeling for TOA-Based Ranging in Tunnels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Erik G. Larsson, Javier Ferrer-Coll, Jose Chilo, Per Angskog, Peter Stenumgaard, Vladimir Savic","submitted_at":"2013-12-22T18:51:14Z","abstract_excerpt":"A robust and accurate positioning solution is required to increase the safety in GPS-denied environments. Although there is a lot of available research in this area, little has been done for confined environments such as tunnels. Therefore, we organized a measurement campaign in a basement tunnel of Link\\\"{o}ping university, in which we obtained ultra-wideband (UWB) complex impulse responses for line-of-sight (LOS), and three non-LOS (NLOS) scenarios. This paper is focused on time-of-arrival (TOA) ranging since this technique can provide the most accurate range estimates, which are required fo"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1312.6415","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2013-12-22T18:51:14Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"70ec1230bc0bceb9c2ed76a92be68c378b8fdf0a07a8a17c9579b3426c874c75","abstract_canon_sha256":"cb041bda5b27dab92728c1de6ec87e9ab4f258b9715213ffb1996b431fcd2882"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:53.009754Z","signature_b64":"wRkNGz6pyWpGF38tgS4Mfjl4sLuHyPWKpr7ZeVySJXMEL7dm2A+T8nJGEzCUVCJFxQnrRotbwRGaQCkIzAv+CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7671880fb24e028fc98ab2745b7912ff3aca87191536284a0e0f7889c9a80a65","last_reissued_at":"2026-05-18T02:26:53.009328Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:53.009328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement Analysis and Channel Modeling for TOA-Based Ranging in Tunnels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Erik G. Larsson, Javier Ferrer-Coll, Jose Chilo, Per Angskog, Peter Stenumgaard, Vladimir Savic","submitted_at":"2013-12-22T18:51:14Z","abstract_excerpt":"A robust and accurate positioning solution is required to increase the safety in GPS-denied environments. Although there is a lot of available research in this area, little has been done for confined environments such as tunnels. Therefore, we organized a measurement campaign in a basement tunnel of Link\\\"{o}ping university, in which we obtained ultra-wideband (UWB) complex impulse responses for line-of-sight (LOS), and three non-LOS (NLOS) scenarios. This paper is focused on time-of-arrival (TOA) ranging since this technique can provide the most accurate range estimates, which are required fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.6415","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1312.6415","created_at":"2026-05-18T02:26:53.009397+00:00"},{"alias_kind":"arxiv_version","alias_value":"1312.6415v2","created_at":"2026-05-18T02:26:53.009397+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.6415","created_at":"2026-05-18T02:26:53.009397+00:00"},{"alias_kind":"pith_short_12","alias_value":"OZYYQD5SJYBI","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_16","alias_value":"OZYYQD5SJYBI7SMK","created_at":"2026-05-18T12:27:54.935989+00:00"},{"alias_kind":"pith_short_8","alias_value":"OZYYQD5S","created_at":"2026-05-18T12:27:54.935989+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74","json":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74.json","graph_json":"https://pith.science/api/pith-number/OZYYQD5SJYBI7SMKWJ2FW6IS74/graph.json","events_json":"https://pith.science/api/pith-number/OZYYQD5SJYBI7SMKWJ2FW6IS74/events.json","paper":"https://pith.science/paper/OZYYQD5S"},"agent_actions":{"view_html":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74","download_json":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74.json","view_paper":"https://pith.science/paper/OZYYQD5S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1312.6415&json=true","fetch_graph":"https://pith.science/api/pith-number/OZYYQD5SJYBI7SMKWJ2FW6IS74/graph.json","fetch_events":"https://pith.science/api/pith-number/OZYYQD5SJYBI7SMKWJ2FW6IS74/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74/action/storage_attestation","attest_author":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74/action/author_attestation","sign_citation":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74/action/citation_signature","submit_replication":"https://pith.science/pith/OZYYQD5SJYBI7SMKWJ2FW6IS74/action/replication_record"}},"created_at":"2026-05-18T02:26:53.009397+00:00","updated_at":"2026-05-18T02:26:53.009397+00:00"}