{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:RC3NOBGCC7OROEFCLYJH4VTGVP","short_pith_number":"pith:RC3NOBGC","canonical_record":{"source":{"id":"2607.15690","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-07-17T07:06:38Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"c801bd5247def0525e27fbfca969a022e4e9188c2ce40be3b13748cfaf81ccd7","abstract_canon_sha256":"7897596a46f89bd4815e770403f2bd77ca939e13280288a61ea70e520e794aa1"},"schema_version":"1.0"},"canonical_sha256":"88b6d704c217dd1710a25e127e5666abc78639edb3c41643d3902d9537acbed8","source":{"kind":"arxiv","id":"2607.15690","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15690","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15690v1","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15690","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_12","alias_value":"RC3NOBGCC7OR","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_16","alias_value":"RC3NOBGCC7OROEFC","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_8","alias_value":"RC3NOBGC","created_at":"2026-07-20T01:19:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:RC3NOBGCC7OROEFCLYJH4VTGVP","target":"record","payload":{"canonical_record":{"source":{"id":"2607.15690","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-07-17T07:06:38Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"c801bd5247def0525e27fbfca969a022e4e9188c2ce40be3b13748cfaf81ccd7","abstract_canon_sha256":"7897596a46f89bd4815e770403f2bd77ca939e13280288a61ea70e520e794aa1"},"schema_version":"1.0"},"canonical_sha256":"88b6d704c217dd1710a25e127e5666abc78639edb3c41643d3902d9537acbed8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-20T01:19:04.537725Z","signature_b64":"NNJWMrxjgN5o2OcUFG/YNqnmiCrR0M9n7Qai4Rr1pvyAinBCdmA26ywgBw8o6acte53B0Eoq28TP5ytgOedNAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88b6d704c217dd1710a25e127e5666abc78639edb3c41643d3902d9537acbed8","last_reissued_at":"2026-07-20T01:19:04.536887Z","signature_status":"signed_v1","first_computed_at":"2026-07-20T01:19:04.536887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.15690","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-20T01:19:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3wtp7D2Ib5m77j5t5niMuxgaJ996N0iUoDgx1lcjBoFu8LLq28OY4A1mK8iXis1/QFZaLtYCz4redgd27OaTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:43:48.879253Z"},"content_sha256":"02a91786c78bdc6c8abaaeef27e005f707aba042dbd496efcb6d9efe7015c2a9","schema_version":"1.0","event_id":"sha256:02a91786c78bdc6c8abaaeef27e005f707aba042dbd496efcb6d9efe7015c2a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:RC3NOBGCC7OROEFCLYJH4VTGVP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Obstacle-Aware Four-Dimensional Trajectory Design for Urban Air Mobility","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Arunchandar Vasan, Prasad Devkar, Yashovardhan S. Chati","submitted_at":"2026-07-17T07:06:38Z","abstract_excerpt":"Urban Air Mobility (UAM) with electric Vertical TakeOff and Landing (eVTOL) vehicles can help address ground traffic congestion. The design of an eVTOL trajectory that is safe and reduces travel time is key for UAM adoption. Existing works on trajectory design either may not adequately incorporate dense obstacles in urban environments, complex eVTOL flight dynamics, or one or more flight phases. Not considering these factors can result in low-quality, or worse infeasible, trajectories. We develop a hybrid framework that can integrate building obstacles data, wind data, eVTOL flight dynamics, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15690","kind":"arxiv","version":1},"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/2607.15690/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":"2026-07-20T01:19:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nHL7E4wE4a+Y65hzzMdy5BFh/7wkhdI8O+K/eqavfbDgpo+NbosZz7l4DjwbKGTxj1PN0VU28an+qte57ow3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:43:48.880209Z"},"content_sha256":"a871d5192f4549b03882908df888da8d09691d4fe5334be94ddca577785f552b","schema_version":"1.0","event_id":"sha256:a871d5192f4549b03882908df888da8d09691d4fe5334be94ddca577785f552b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/bundle.json","state_url":"https://pith.science/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/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":"2026-08-09T19:43:48Z","links":{"resolver":"https://pith.science/pith/RC3NOBGCC7OROEFCLYJH4VTGVP","bundle":"https://pith.science/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/bundle.json","state":"https://pith.science/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RC3NOBGCC7OROEFCLYJH4VTGVP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:RC3NOBGCC7OROEFCLYJH4VTGVP","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":"7897596a46f89bd4815e770403f2bd77ca939e13280288a61ea70e520e794aa1","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-07-17T07:06:38Z","title_canon_sha256":"c801bd5247def0525e27fbfca969a022e4e9188c2ce40be3b13748cfaf81ccd7"},"schema_version":"1.0","source":{"id":"2607.15690","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15690","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15690v1","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15690","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_12","alias_value":"RC3NOBGCC7OR","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_16","alias_value":"RC3NOBGCC7OROEFC","created_at":"2026-07-20T01:19:04Z"},{"alias_kind":"pith_short_8","alias_value":"RC3NOBGC","created_at":"2026-07-20T01:19:04Z"}],"graph_snapshots":[{"event_id":"sha256:a871d5192f4549b03882908df888da8d09691d4fe5334be94ddca577785f552b","target":"graph","created_at":"2026-07-20T01:19:04Z","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/2607.15690/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Urban Air Mobility (UAM) with electric Vertical TakeOff and Landing (eVTOL) vehicles can help address ground traffic congestion. The design of an eVTOL trajectory that is safe and reduces travel time is key for UAM adoption. Existing works on trajectory design either may not adequately incorporate dense obstacles in urban environments, complex eVTOL flight dynamics, or one or more flight phases. Not considering these factors can result in low-quality, or worse infeasible, trajectories. We develop a hybrid framework that can integrate building obstacles data, wind data, eVTOL flight dynamics, a","authors_text":"Arunchandar Vasan, Prasad Devkar, Yashovardhan S. Chati","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-07-17T07:06:38Z","title":"Obstacle-Aware Four-Dimensional Trajectory Design for Urban Air Mobility"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15690","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":"sha256:02a91786c78bdc6c8abaaeef27e005f707aba042dbd496efcb6d9efe7015c2a9","target":"record","created_at":"2026-07-20T01:19:04Z","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":"7897596a46f89bd4815e770403f2bd77ca939e13280288a61ea70e520e794aa1","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2026-07-17T07:06:38Z","title_canon_sha256":"c801bd5247def0525e27fbfca969a022e4e9188c2ce40be3b13748cfaf81ccd7"},"schema_version":"1.0","source":{"id":"2607.15690","kind":"arxiv","version":1}},"canonical_sha256":"88b6d704c217dd1710a25e127e5666abc78639edb3c41643d3902d9537acbed8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"88b6d704c217dd1710a25e127e5666abc78639edb3c41643d3902d9537acbed8","first_computed_at":"2026-07-20T01:19:04.536887Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-20T01:19:04.536887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NNJWMrxjgN5o2OcUFG/YNqnmiCrR0M9n7Qai4Rr1pvyAinBCdmA26ywgBw8o6acte53B0Eoq28TP5ytgOedNAw==","signature_status":"signed_v1","signed_at":"2026-07-20T01:19:04.537725Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.15690","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02a91786c78bdc6c8abaaeef27e005f707aba042dbd496efcb6d9efe7015c2a9","sha256:a871d5192f4549b03882908df888da8d09691d4fe5334be94ddca577785f552b"],"state_sha256":"adeea126c726ea2dd5a19d9779a8b54065e026437642041ed44d4a8c8a7afb56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LATqOL5b7p7v6Gp4NIF0jAqRaueLVlZ1TJA+OWHct8WaEOeeptCqyXVNxMiuspdMNnZCaTq185bK0aRDqSwiCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T19:43:48.887081Z","bundle_sha256":"fbc50550344f65fe6fc04c9dba1dfe99c126b5e173fc3a9ab8a502f3eeb7ae8e"}}