{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:N33J4N7VXCORAAXU65HBHGHAJ7","short_pith_number":"pith:N33J4N7V","schema_version":"1.0","canonical_sha256":"6ef69e37f5b89d1002f4f74e1398e04fe6b91fe69f4c0e020fb6fd705400880b","source":{"kind":"arxiv","id":"2606.31928","version":1},"attestation_state":"computed","paper":{"title":"Conditional Normalizing Flow for Gas-Surface Scattering from Thermal to Hypersonic Velocities","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.comp-ph","authors_text":"Hansj\\\"org Lipp, Johannes Roth, Marcel Pfeiffer, Miklas Sch\\\"utte, Stefanos Fasoulas, Stephen Hocker","submitted_at":"2026-06-30T16:36:33Z","abstract_excerpt":"Accurate aerodynamic modeling of satellites in very low Earth orbit (VLEO) requires gas-surface interaction (GSI) models that capture the full velocity spectrum from thermal to orbital speeds. Atmospheric particles initially strike spacecraft surfaces at hypersonic velocities of 6 000 - 10 000 m/s. Due to surface roughness and complex geometries, especially within air-breathing electric propulsion (ABEP) intake systems, multiple collisions occur, progressively reducing the particle velocities. A recent machine learning framework for deriving scattering kernels from molecular dynamics (MD) simu"},"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":"2606.31928","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.comp-ph","submitted_at":"2026-06-30T16:36:33Z","cross_cats_sorted":[],"title_canon_sha256":"df538da297343f4fa1648deac982ae0dd9fbc4f3fd7507c7f68eb85d8b4d1255","abstract_canon_sha256":"d1099d3bf5ee270b1a3171cd6d7d445defd0a33a1f55660c7e795257b78fa6a5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-01T01:18:25.634436Z","signature_b64":"8pdxeUnbSgAMObIHFTVtasRreiJ9bMs/Yc6MmDr9xLt/qvdPTClA3aRtrnhEWlEPIp7maVlHd8wApmMhQ14iDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ef69e37f5b89d1002f4f74e1398e04fe6b91fe69f4c0e020fb6fd705400880b","last_reissued_at":"2026-07-01T01:18:25.633904Z","signature_status":"signed_v1","first_computed_at":"2026-07-01T01:18:25.633904Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Conditional Normalizing Flow for Gas-Surface Scattering from Thermal to Hypersonic Velocities","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.comp-ph","authors_text":"Hansj\\\"org Lipp, Johannes Roth, Marcel Pfeiffer, Miklas Sch\\\"utte, Stefanos Fasoulas, Stephen Hocker","submitted_at":"2026-06-30T16:36:33Z","abstract_excerpt":"Accurate aerodynamic modeling of satellites in very low Earth orbit (VLEO) requires gas-surface interaction (GSI) models that capture the full velocity spectrum from thermal to orbital speeds. Atmospheric particles initially strike spacecraft surfaces at hypersonic velocities of 6 000 - 10 000 m/s. Due to surface roughness and complex geometries, especially within air-breathing electric propulsion (ABEP) intake systems, multiple collisions occur, progressively reducing the particle velocities. A recent machine learning framework for deriving scattering kernels from molecular dynamics (MD) simu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.31928","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/2606.31928/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2606.31928","created_at":"2026-07-01T01:18:25.633964+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.31928v1","created_at":"2026-07-01T01:18:25.633964+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.31928","created_at":"2026-07-01T01:18:25.633964+00:00"},{"alias_kind":"pith_short_12","alias_value":"N33J4N7VXCOR","created_at":"2026-07-01T01:18:25.633964+00:00"},{"alias_kind":"pith_short_16","alias_value":"N33J4N7VXCORAAXU","created_at":"2026-07-01T01:18:25.633964+00:00"},{"alias_kind":"pith_short_8","alias_value":"N33J4N7V","created_at":"2026-07-01T01:18:25.633964+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/N33J4N7VXCORAAXU65HBHGHAJ7","json":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7.json","graph_json":"https://pith.science/api/pith-number/N33J4N7VXCORAAXU65HBHGHAJ7/graph.json","events_json":"https://pith.science/api/pith-number/N33J4N7VXCORAAXU65HBHGHAJ7/events.json","paper":"https://pith.science/paper/N33J4N7V"},"agent_actions":{"view_html":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7","download_json":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7.json","view_paper":"https://pith.science/paper/N33J4N7V","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.31928&json=true","fetch_graph":"https://pith.science/api/pith-number/N33J4N7VXCORAAXU65HBHGHAJ7/graph.json","fetch_events":"https://pith.science/api/pith-number/N33J4N7VXCORAAXU65HBHGHAJ7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7/action/storage_attestation","attest_author":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7/action/author_attestation","sign_citation":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7/action/citation_signature","submit_replication":"https://pith.science/pith/N33J4N7VXCORAAXU65HBHGHAJ7/action/replication_record"}},"created_at":"2026-07-01T01:18:25.633964+00:00","updated_at":"2026-07-01T01:18:25.633964+00:00"}