{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:QDJDRWWZCCZRRKPHGNABFHKQR5","short_pith_number":"pith:QDJDRWWZ","canonical_record":{"source":{"id":"2603.10362","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-03-11T03:23:33Z","cross_cats_sorted":[],"title_canon_sha256":"6f3ac1618e32d3a6ed647a4a386fcb769d466fa3092d444d456308353bbfb9f2","abstract_canon_sha256":"e7086ecb48e70bbf8bf788f3bb41858d5ab126017a2d24835b8940dfa56969b6"},"schema_version":"1.0"},"canonical_sha256":"80d238dad910b318a9e73340129d508f5e70fb0c15086e0885239b11af93dea0","source":{"kind":"arxiv","id":"2603.10362","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.10362","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"arxiv_version","alias_value":"2603.10362v2","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.10362","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_12","alias_value":"QDJDRWWZCCZR","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_16","alias_value":"QDJDRWWZCCZRRKPH","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_8","alias_value":"QDJDRWWZ","created_at":"2026-05-26T01:03:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:QDJDRWWZCCZRRKPHGNABFHKQR5","target":"record","payload":{"canonical_record":{"source":{"id":"2603.10362","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-03-11T03:23:33Z","cross_cats_sorted":[],"title_canon_sha256":"6f3ac1618e32d3a6ed647a4a386fcb769d466fa3092d444d456308353bbfb9f2","abstract_canon_sha256":"e7086ecb48e70bbf8bf788f3bb41858d5ab126017a2d24835b8940dfa56969b6"},"schema_version":"1.0"},"canonical_sha256":"80d238dad910b318a9e73340129d508f5e70fb0c15086e0885239b11af93dea0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-26T01:03:27.715852Z","signature_b64":"USHGvXLrHHRHtAKabs+3t7FBjgqFqaH4PUYKUj67fBILgXHlUsHbTnQw7SveYA9rxJVUQo7X52IjHw+zF1BXCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"80d238dad910b318a9e73340129d508f5e70fb0c15086e0885239b11af93dea0","last_reissued_at":"2026-05-26T01:03:27.714860Z","signature_status":"signed_v1","first_computed_at":"2026-05-26T01:03:27.714860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2603.10362","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-26T01:03:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M1UJ6LIPzwKpX46T14w6fBVnif75RhRWvYqi7n6JhGmsG9NocmFhu56fENvoAf2zW/ulGNGF/OMicfqeMA4/CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:11:08.329236Z"},"content_sha256":"78a65e909ad6c2e10b5f47a93a707ad56ebe9bec2a4abf622b00dfce120af2ee","schema_version":"1.0","event_id":"sha256:78a65e909ad6c2e10b5f47a93a707ad56ebe9bec2a4abf622b00dfce120af2ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:QDJDRWWZCCZRRKPHGNABFHKQR5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"UAV-Based 3D Spectrum Sensing: Insights on Altitude, Bandwidth, Trajectory, and Effective Antenna Patterns on REM Reconstruction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Arupjyoti Bhuyan, Chau-Wai Wong, Ismail Guvenc, Jason A. Abrahamson, Mihail Sichitiu, Mushfiqur Rahman, Sung Joon Maeng","submitted_at":"2026-03-11T03:23:33Z","abstract_excerpt":"Spectrum sensing and the generation of 3D Radio Environment Maps (REMs) are essential for enabling spectrum sharing within cognitive radio networks. While Uncrewed Aerial Vehicles (UAVs) offer high-mobility 3D sensing, REM accuracy is challenged by dynamic flight behaviors, where fluctuations in UAV speed and direction introduce measurement inconsistencies. Furthermore, the airframe itself impacts the onboard antenna's radiation characteristics. In this paper, using real-world data, we systematically analyze how REM reconstruction accuracy is shaped by three key pillars: physical sensing param"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.10362","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.10362/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-26T01:03:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y0E2q/gHr0txPLEX82eqnx8y9HcCbfzuHslon2nmMjDgSJBMIEFMhgn5BfkLuu1Me6IZ+hyN0Bzh2ezFwOh2Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T16:11:08.329972Z"},"content_sha256":"2aa55c068cbab88f05989db2ff840d4bef917978bd3ac702c3fe9208f4e5a5b6","schema_version":"1.0","event_id":"sha256:2aa55c068cbab88f05989db2ff840d4bef917978bd3ac702c3fe9208f4e5a5b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/bundle.json","state_url":"https://pith.science/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-29T16:11:08Z","links":{"resolver":"https://pith.science/pith/QDJDRWWZCCZRRKPHGNABFHKQR5","bundle":"https://pith.science/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/bundle.json","state":"https://pith.science/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QDJDRWWZCCZRRKPHGNABFHKQR5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QDJDRWWZCCZRRKPHGNABFHKQR5","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":"e7086ecb48e70bbf8bf788f3bb41858d5ab126017a2d24835b8940dfa56969b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-03-11T03:23:33Z","title_canon_sha256":"6f3ac1618e32d3a6ed647a4a386fcb769d466fa3092d444d456308353bbfb9f2"},"schema_version":"1.0","source":{"id":"2603.10362","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.10362","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"arxiv_version","alias_value":"2603.10362v2","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.10362","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_12","alias_value":"QDJDRWWZCCZR","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_16","alias_value":"QDJDRWWZCCZRRKPH","created_at":"2026-05-26T01:03:27Z"},{"alias_kind":"pith_short_8","alias_value":"QDJDRWWZ","created_at":"2026-05-26T01:03:27Z"}],"graph_snapshots":[{"event_id":"sha256:2aa55c068cbab88f05989db2ff840d4bef917978bd3ac702c3fe9208f4e5a5b6","target":"graph","created_at":"2026-05-26T01:03:27Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2603.10362/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Spectrum sensing and the generation of 3D Radio Environment Maps (REMs) are essential for enabling spectrum sharing within cognitive radio networks. While Uncrewed Aerial Vehicles (UAVs) offer high-mobility 3D sensing, REM accuracy is challenged by dynamic flight behaviors, where fluctuations in UAV speed and direction introduce measurement inconsistencies. Furthermore, the airframe itself impacts the onboard antenna's radiation characteristics. In this paper, using real-world data, we systematically analyze how REM reconstruction accuracy is shaped by three key pillars: physical sensing param","authors_text":"Arupjyoti Bhuyan, Chau-Wai Wong, Ismail Guvenc, Jason A. Abrahamson, Mihail Sichitiu, Mushfiqur Rahman, Sung Joon Maeng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-03-11T03:23:33Z","title":"UAV-Based 3D Spectrum Sensing: Insights on Altitude, Bandwidth, Trajectory, and Effective Antenna Patterns on REM Reconstruction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.10362","kind":"arxiv","version":2},"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":"sha256:78a65e909ad6c2e10b5f47a93a707ad56ebe9bec2a4abf622b00dfce120af2ee","target":"record","created_at":"2026-05-26T01:03:27Z","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":"e7086ecb48e70bbf8bf788f3bb41858d5ab126017a2d24835b8940dfa56969b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2026-03-11T03:23:33Z","title_canon_sha256":"6f3ac1618e32d3a6ed647a4a386fcb769d466fa3092d444d456308353bbfb9f2"},"schema_version":"1.0","source":{"id":"2603.10362","kind":"arxiv","version":2}},"canonical_sha256":"80d238dad910b318a9e73340129d508f5e70fb0c15086e0885239b11af93dea0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"80d238dad910b318a9e73340129d508f5e70fb0c15086e0885239b11af93dea0","first_computed_at":"2026-05-26T01:03:27.714860Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-26T01:03:27.714860Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"USHGvXLrHHRHtAKabs+3t7FBjgqFqaH4PUYKUj67fBILgXHlUsHbTnQw7SveYA9rxJVUQo7X52IjHw+zF1BXCQ==","signature_status":"signed_v1","signed_at":"2026-05-26T01:03:27.715852Z","signed_message":"canonical_sha256_bytes"},"source_id":"2603.10362","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:78a65e909ad6c2e10b5f47a93a707ad56ebe9bec2a4abf622b00dfce120af2ee","sha256:2aa55c068cbab88f05989db2ff840d4bef917978bd3ac702c3fe9208f4e5a5b6"],"state_sha256":"055aca3da3a6c2861feb3d5462d76009dd5f62c4e0356d2a2c0e57287967a4f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OyUKC7szuVqRqUZLqEHqS8lt7zi+8twYLLVv+6QFisIqnuSuZ7HMHMN35I9JyYT+zx4x/CcNRgwFcHJsI8d+AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T16:11:08.333758Z","bundle_sha256":"afa6a2805a4832a8504b73b875adaeb2ab7a5d5068b62fcf796f1d61a206aa09"}}