{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:MOPUEMK4ONHNYBCFWV5N6C42UB","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":"059551efa2120fb31cc4551745bf4617e575c659c628446ca59a30b11cde5478","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-09-21T12:08:14Z","title_canon_sha256":"a50090b6e73fa9db0505a92d94c130ce0f4c23f4447d524047985af94f51344e"},"schema_version":"1.0","source":{"id":"2209.10293","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.10293","created_at":"2026-07-05T04:59:47Z"},{"alias_kind":"arxiv_version","alias_value":"2209.10293v1","created_at":"2026-07-05T04:59:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.10293","created_at":"2026-07-05T04:59:47Z"},{"alias_kind":"pith_short_12","alias_value":"MOPUEMK4ONHN","created_at":"2026-07-05T04:59:47Z"},{"alias_kind":"pith_short_16","alias_value":"MOPUEMK4ONHNYBCF","created_at":"2026-07-05T04:59:47Z"},{"alias_kind":"pith_short_8","alias_value":"MOPUEMK4","created_at":"2026-07-05T04:59:47Z"}],"graph_snapshots":[{"event_id":"sha256:04b77f8edb33fc029078c6d5987060e2aa81cfb2f959b2a08cc0ec77058adb66","target":"graph","created_at":"2026-07-05T04:59:47Z","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/2209.10293/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we model and simulate the performance of a quantum key distribution (QKD) downlink from a low earth orbit (LEO) small satellite to an optical ground station (OGS), as integral part of the concept and preliminary design phase of the QuantSat-PT mission. By modelling and simulating in detail downlink transmission channel effects, with emphasis on turbulent and atmospheric losses for BB84 and E91 protocols, we find a consistent set of values for the performance envelope that resolves ambiguities of mission experimental data that had been reported previous to this work. We obtain for","authors_text":"Manfred Niehus, Vladlen Galetsky","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-09-21T12:08:14Z","title":"LEO small satellite QKD downlink performance: QuantSat-PT case study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.10293","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":"sha256:453318dfb4670b322a1b06f89b6454eed876c7ac926f83344b22eda2b28ada2b","target":"record","created_at":"2026-07-05T04:59:47Z","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":"059551efa2120fb31cc4551745bf4617e575c659c628446ca59a30b11cde5478","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-09-21T12:08:14Z","title_canon_sha256":"a50090b6e73fa9db0505a92d94c130ce0f4c23f4447d524047985af94f51344e"},"schema_version":"1.0","source":{"id":"2209.10293","kind":"arxiv","version":1}},"canonical_sha256":"639f42315c734edc0445b57adf0b9aa064496a019c5efdf073fb5bfe723bd48b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"639f42315c734edc0445b57adf0b9aa064496a019c5efdf073fb5bfe723bd48b","first_computed_at":"2026-07-05T04:59:47.179883Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:59:47.179883Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mHsYg7vVdez9VmJKAlCyT12Gk8CAvfuMZA2ulAige/GdoaL6B6sAOf43eBlN0I8rD/WM9GXV6AIL92UGuu9XBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:59:47.180347Z","signed_message":"canonical_sha256_bytes"},"source_id":"2209.10293","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:453318dfb4670b322a1b06f89b6454eed876c7ac926f83344b22eda2b28ada2b","sha256:04b77f8edb33fc029078c6d5987060e2aa81cfb2f959b2a08cc0ec77058adb66"],"state_sha256":"5214611dc3fe824a47295af2c1603e0a9c578e3f3aa136c26eb74c9ccc8f3c81"}