{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:C2WE7P6WY4ZWCEXASBYSJBQI2N","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":"142790576e8e56a8042858168b5fef175fa84c860b2c855794afd025458eae86","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-06-06T05:22:01Z","title_canon_sha256":"255bdbeb4510bddd5ea7ab76190cd8a248ab2557bf23ea5c74ffde595686fcc4"},"schema_version":"1.0","source":{"id":"2206.02357","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.02357","created_at":"2026-07-05T04:29:17Z"},{"alias_kind":"arxiv_version","alias_value":"2206.02357v1","created_at":"2026-07-05T04:29:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.02357","created_at":"2026-07-05T04:29:17Z"},{"alias_kind":"pith_short_12","alias_value":"C2WE7P6WY4ZW","created_at":"2026-07-05T04:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"C2WE7P6WY4ZWCEXA","created_at":"2026-07-05T04:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"C2WE7P6W","created_at":"2026-07-05T04:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:15c73375c5ed783ba9b6ca44307a0982534e8c99a219810124f9fc4602947c71","target":"graph","created_at":"2026-07-05T04:29:17Z","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/2206.02357/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper describes the use of the Murchison Widefield Array, a low-frequency radio telescope at a radio-quiet Western Australian site, as a radar receiver forming part of a continent-spanning multistatic radar network for the surveillance of space. This paper details the system geometry employed, the orbit-specific radar signal processing, and the orbit determination algorithms necessary to ensure resident space objects are detected, tracked, and propagated. Finally, the paper includes the results processed after a short collection campaign utilising several FM radio transmitters across the ","authors_text":"Ashley Summers, Brendan Hennessy, Brian Crosse, Daniel Gustainis, Marcin Sokolowski, Robert Young, Steven Tingay","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-06-06T05:22:01Z","title":"Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.02357","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":"sha256:811aa7477ab1a6e97c121abcf26f353dd46a9c99619a7eb46ff1f50374a4f7c5","target":"record","created_at":"2026-07-05T04:29:17Z","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":"142790576e8e56a8042858168b5fef175fa84c860b2c855794afd025458eae86","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2022-06-06T05:22:01Z","title_canon_sha256":"255bdbeb4510bddd5ea7ab76190cd8a248ab2557bf23ea5c74ffde595686fcc4"},"schema_version":"1.0","source":{"id":"2206.02357","kind":"arxiv","version":1}},"canonical_sha256":"16ac4fbfd6c7336112e09071248608d34bb499de387e5c3c35deb06428f9d569","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16ac4fbfd6c7336112e09071248608d34bb499de387e5c3c35deb06428f9d569","first_computed_at":"2026-07-05T04:29:17.044408Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:29:17.044408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qziTRAGaOqPoWNzDxWLkqT4wBnq2ezY/4KYWunV6kt75uLQCKISxhDFCWW09brxQYGg2SfM3Fpj7HjZdYga4Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:29:17.044825Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.02357","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:811aa7477ab1a6e97c121abcf26f353dd46a9c99619a7eb46ff1f50374a4f7c5","sha256:15c73375c5ed783ba9b6ca44307a0982534e8c99a219810124f9fc4602947c71"],"state_sha256":"79804ca8a07d206a626ab22d3c97514da43c818613b0f994734f599266b4f2cb"}