{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:I7XCRSUAK6KYR67N6TGZFM3V77","short_pith_number":"pith:I7XCRSUA","canonical_record":{"source":{"id":"2001.07646","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2020-01-21T16:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"eab5122647a4e60606ae4e95aca22e56945c2735a4fb164be4892581190a0307","abstract_canon_sha256":"b84cb12a379a974aaeb01a03611669d380b40b13bbcfeb9cab65aab3c21dbccb"},"schema_version":"1.0"},"canonical_sha256":"47ee28ca80579588fbedf4cd92b375ffcb9823e07c152d72319963c5d4144a02","source":{"kind":"arxiv","id":"2001.07646","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.07646","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"arxiv_version","alias_value":"2001.07646v1","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.07646","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_12","alias_value":"I7XCRSUAK6KY","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_16","alias_value":"I7XCRSUAK6KYR67N","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_8","alias_value":"I7XCRSUA","created_at":"2026-07-05T00:34:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:I7XCRSUAK6KYR67N6TGZFM3V77","target":"record","payload":{"canonical_record":{"source":{"id":"2001.07646","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2020-01-21T16:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"eab5122647a4e60606ae4e95aca22e56945c2735a4fb164be4892581190a0307","abstract_canon_sha256":"b84cb12a379a974aaeb01a03611669d380b40b13bbcfeb9cab65aab3c21dbccb"},"schema_version":"1.0"},"canonical_sha256":"47ee28ca80579588fbedf4cd92b375ffcb9823e07c152d72319963c5d4144a02","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:34:58.012028Z","signature_b64":"JPDvjiFiOFcqczFLgCjeDEigM/tGrZoJVmyT/MAy8VsaavhtzVvVlWUDTOgzKQnx+3e9Ri+KsFQlXFilU1AAAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47ee28ca80579588fbedf4cd92b375ffcb9823e07c152d72319963c5d4144a02","last_reissued_at":"2026-07-05T00:34:58.011622Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:34:58.011622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.07646","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":"2026-07-05T00:34:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLtZoxU+euxNAY/05Qw0JtKSHnVX9ZgpQx0B7gDywpwU3Ap2PJoQiLuV/slYZnmzbvBfzvTYZjPNhdiueFcnAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T16:38:21.452875Z"},"content_sha256":"7d08933211a571c9d4189b33734098a26a526920562cb09a429f90d20a3d8e2f","schema_version":"1.0","event_id":"sha256:7d08933211a571c9d4189b33734098a26a526920562cb09a429f90d20a3d8e2f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:I7XCRSUAK6KYR67N6TGZFM3V77","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How Fast You Can Actually Fly: A Comparative Investigation of Flight Airborne Time in China and the U.S","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Bo Zou, Ke Liu, Mark Hansen, Zhe Zheng","submitted_at":"2020-01-21T16:50:40Z","abstract_excerpt":"Actual airborne time (AAT) is the time between wheels-off and wheels-on of a flight. Understanding the behavior of AAT is increasingly important given the ever growing demand for air travel and flight delays becoming more rampant. As no research on AAT exists, this paper performs the first empirical analysis of AAT behavior, comparatively for the U.S. and China. The focus is on how AAT is affected by scheduled block time (SBT), origin-destination (OD) distance, and the possible pressure to reduce AAT from other parts of flight operations. Multiple econometric models are developed. The estimati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.07646","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/2001.07646/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":"2026-07-05T00:34:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dyxzevk77PGUxG8rO1uS1xT1CTEULj3UD1ybz15EJFM9XY/4K5bNpFv4MqP24fdwv5MbSmqCA2UEYULEuzKmBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T16:38:21.453513Z"},"content_sha256":"3e5e30dd4a170eb3d7b77ceab2360f53fb7b88faa83e682fb34e5c3253bb433e","schema_version":"1.0","event_id":"sha256:3e5e30dd4a170eb3d7b77ceab2360f53fb7b88faa83e682fb34e5c3253bb433e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I7XCRSUAK6KYR67N6TGZFM3V77/bundle.json","state_url":"https://pith.science/pith/I7XCRSUAK6KYR67N6TGZFM3V77/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I7XCRSUAK6KYR67N6TGZFM3V77/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":"2026-08-21T16:38:21Z","links":{"resolver":"https://pith.science/pith/I7XCRSUAK6KYR67N6TGZFM3V77","bundle":"https://pith.science/pith/I7XCRSUAK6KYR67N6TGZFM3V77/bundle.json","state":"https://pith.science/pith/I7XCRSUAK6KYR67N6TGZFM3V77/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I7XCRSUAK6KYR67N6TGZFM3V77/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:I7XCRSUAK6KYR67N6TGZFM3V77","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":"b84cb12a379a974aaeb01a03611669d380b40b13bbcfeb9cab65aab3c21dbccb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2020-01-21T16:50:40Z","title_canon_sha256":"eab5122647a4e60606ae4e95aca22e56945c2735a4fb164be4892581190a0307"},"schema_version":"1.0","source":{"id":"2001.07646","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.07646","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"arxiv_version","alias_value":"2001.07646v1","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.07646","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_12","alias_value":"I7XCRSUAK6KY","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_16","alias_value":"I7XCRSUAK6KYR67N","created_at":"2026-07-05T00:34:58Z"},{"alias_kind":"pith_short_8","alias_value":"I7XCRSUA","created_at":"2026-07-05T00:34:58Z"}],"graph_snapshots":[{"event_id":"sha256:3e5e30dd4a170eb3d7b77ceab2360f53fb7b88faa83e682fb34e5c3253bb433e","target":"graph","created_at":"2026-07-05T00:34:58Z","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/2001.07646/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Actual airborne time (AAT) is the time between wheels-off and wheels-on of a flight. Understanding the behavior of AAT is increasingly important given the ever growing demand for air travel and flight delays becoming more rampant. As no research on AAT exists, this paper performs the first empirical analysis of AAT behavior, comparatively for the U.S. and China. The focus is on how AAT is affected by scheduled block time (SBT), origin-destination (OD) distance, and the possible pressure to reduce AAT from other parts of flight operations. Multiple econometric models are developed. The estimati","authors_text":"Bo Zou, Ke Liu, Mark Hansen, Zhe Zheng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2020-01-21T16:50:40Z","title":"How Fast You Can Actually Fly: A Comparative Investigation of Flight Airborne Time in China and the U.S"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.07646","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":"sha256:7d08933211a571c9d4189b33734098a26a526920562cb09a429f90d20a3d8e2f","target":"record","created_at":"2026-07-05T00:34:58Z","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":"b84cb12a379a974aaeb01a03611669d380b40b13bbcfeb9cab65aab3c21dbccb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2020-01-21T16:50:40Z","title_canon_sha256":"eab5122647a4e60606ae4e95aca22e56945c2735a4fb164be4892581190a0307"},"schema_version":"1.0","source":{"id":"2001.07646","kind":"arxiv","version":1}},"canonical_sha256":"47ee28ca80579588fbedf4cd92b375ffcb9823e07c152d72319963c5d4144a02","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47ee28ca80579588fbedf4cd92b375ffcb9823e07c152d72319963c5d4144a02","first_computed_at":"2026-07-05T00:34:58.011622Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:34:58.011622Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JPDvjiFiOFcqczFLgCjeDEigM/tGrZoJVmyT/MAy8VsaavhtzVvVlWUDTOgzKQnx+3e9Ri+KsFQlXFilU1AAAg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:34:58.012028Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.07646","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d08933211a571c9d4189b33734098a26a526920562cb09a429f90d20a3d8e2f","sha256:3e5e30dd4a170eb3d7b77ceab2360f53fb7b88faa83e682fb34e5c3253bb433e"],"state_sha256":"79fb38126753c5c28406c3d6bf19fd6f0d431061380bec09e2b4a900330ea543"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7RKd8z/kWP4KtPQkalmoJCfAEq8P+kPXkOyO7JdIE176oXXDaqEZeQ8ZmyRUjqzgeCTzS+6OeaFA08lSLP4fDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T16:38:21.457642Z","bundle_sha256":"12b65114e62ece5c707976ac1d44f4e343f4765e5d739fdb6807e705e7cd656c"}}