{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:PDTHBQ3QH6C7U5LLL2LVYTNPNL","short_pith_number":"pith:PDTHBQ3Q","canonical_record":{"source":{"id":"1805.08414","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-22T06:00:16Z","cross_cats_sorted":[],"title_canon_sha256":"4c7673067e1b02b09974f345d2fa62e2924ed93b3a24dd7b52c32b7704b1a22d","abstract_canon_sha256":"67e604c1b8d9f2d7e8d5947699fb01986b07d60d2a650c96f93426aff335e61a"},"schema_version":"1.0"},"canonical_sha256":"78e670c3703f85fa756b5e975c4daf6acfb1ada98418ee4d4b5168310e279f41","source":{"kind":"arxiv","id":"1805.08414","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.08414","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"arxiv_version","alias_value":"1805.08414v2","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.08414","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"pith_short_12","alias_value":"PDTHBQ3QH6C7","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"PDTHBQ3QH6C7U5LL","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"PDTHBQ3Q","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:PDTHBQ3QH6C7U5LLL2LVYTNPNL","target":"record","payload":{"canonical_record":{"source":{"id":"1805.08414","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-22T06:00:16Z","cross_cats_sorted":[],"title_canon_sha256":"4c7673067e1b02b09974f345d2fa62e2924ed93b3a24dd7b52c32b7704b1a22d","abstract_canon_sha256":"67e604c1b8d9f2d7e8d5947699fb01986b07d60d2a650c96f93426aff335e61a"},"schema_version":"1.0"},"canonical_sha256":"78e670c3703f85fa756b5e975c4daf6acfb1ada98418ee4d4b5168310e279f41","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:35.570302Z","signature_b64":"CtpcJ6jlU/dsBFLt14KN4Ds/gW5yQCgCz+lwjSsUrd5M5jsC+BmVMbjjLHM9PpxvO7/Ns9rCLSjl+w6Fy8hsDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78e670c3703f85fa756b5e975c4daf6acfb1ada98418ee4d4b5168310e279f41","last_reissued_at":"2026-05-18T00:09:35.569798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:35.569798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.08414","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:09:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kdm1HW7eIiBN8x9uJxIWtf7u8GoHIV5MUZGtWXDEiNdzLsklqxc/rCcMaV+M4VDvZNqhH3rHX6YfH/zRw5nhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:49:18.055679Z"},"content_sha256":"edbd55e323c9af2b107933052423d5560f5cfa17e84520bec7e4fd713992aca6","schema_version":"1.0","event_id":"sha256:edbd55e323c9af2b107933052423d5560f5cfa17e84520bec7e4fd713992aca6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:PDTHBQ3QH6C7U5LLL2LVYTNPNL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SAT.STFR.FRQ (UWA) Detail Design Report (MID)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"David Gozzard, Sascha Schediwy","submitted_at":"2018-05-22T06:00:16Z","abstract_excerpt":"The Square Kilometre Array (SKA) project is an international effort to build the world's most sensitive radio telescope operating in the 50 MHz to 14 GHz frequency range. Construction of the SKA is divided into phases, with the first phase (SKA1) accounting for the first 10% of the telescope's receiving capacity. During SKA1, a Low-Frequency Aperture Array (LFAA) comprising over a hundred thousand individual dipole antenna elements will be constructed in Western Australia (SKA1-LOW), while an array of 197 parabolic-receptor antennas, incorporating the 64 receptors of MeerKAT, will be construct"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.08414","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:09:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yaVPH4tsWQc35QxIuXTVhr8BR7O/2pCR8S+dfJV12z4Wth1EEvtlCkJlEpNglcsgfQ1w+NaY+k78T+xTjFp2Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:49:18.056390Z"},"content_sha256":"6dd876295e4f00a61515ee6fdf93e5bad87fcb3e3807f395f8689dfb82161b2e","schema_version":"1.0","event_id":"sha256:6dd876295e4f00a61515ee6fdf93e5bad87fcb3e3807f395f8689dfb82161b2e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/bundle.json","state_url":"https://pith.science/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/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":"2026-05-31T11:49:18Z","links":{"resolver":"https://pith.science/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL","bundle":"https://pith.science/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/bundle.json","state":"https://pith.science/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PDTHBQ3QH6C7U5LLL2LVYTNPNL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PDTHBQ3QH6C7U5LLL2LVYTNPNL","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":"67e604c1b8d9f2d7e8d5947699fb01986b07d60d2a650c96f93426aff335e61a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-22T06:00:16Z","title_canon_sha256":"4c7673067e1b02b09974f345d2fa62e2924ed93b3a24dd7b52c32b7704b1a22d"},"schema_version":"1.0","source":{"id":"1805.08414","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.08414","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"arxiv_version","alias_value":"1805.08414v2","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.08414","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"pith_short_12","alias_value":"PDTHBQ3QH6C7","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"PDTHBQ3QH6C7U5LL","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"PDTHBQ3Q","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:6dd876295e4f00a61515ee6fdf93e5bad87fcb3e3807f395f8689dfb82161b2e","target":"graph","created_at":"2026-05-18T00:09:35Z","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"},"paper":{"abstract_excerpt":"The Square Kilometre Array (SKA) project is an international effort to build the world's most sensitive radio telescope operating in the 50 MHz to 14 GHz frequency range. Construction of the SKA is divided into phases, with the first phase (SKA1) accounting for the first 10% of the telescope's receiving capacity. During SKA1, a Low-Frequency Aperture Array (LFAA) comprising over a hundred thousand individual dipole antenna elements will be constructed in Western Australia (SKA1-LOW), while an array of 197 parabolic-receptor antennas, incorporating the 64 receptors of MeerKAT, will be construct","authors_text":"David Gozzard, Sascha Schediwy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-22T06:00:16Z","title":"SAT.STFR.FRQ (UWA) Detail Design Report (MID)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.08414","kind":"arxiv","version":2},"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:edbd55e323c9af2b107933052423d5560f5cfa17e84520bec7e4fd713992aca6","target":"record","created_at":"2026-05-18T00:09:35Z","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":"67e604c1b8d9f2d7e8d5947699fb01986b07d60d2a650c96f93426aff335e61a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-05-22T06:00:16Z","title_canon_sha256":"4c7673067e1b02b09974f345d2fa62e2924ed93b3a24dd7b52c32b7704b1a22d"},"schema_version":"1.0","source":{"id":"1805.08414","kind":"arxiv","version":2}},"canonical_sha256":"78e670c3703f85fa756b5e975c4daf6acfb1ada98418ee4d4b5168310e279f41","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78e670c3703f85fa756b5e975c4daf6acfb1ada98418ee4d4b5168310e279f41","first_computed_at":"2026-05-18T00:09:35.569798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:35.569798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CtpcJ6jlU/dsBFLt14KN4Ds/gW5yQCgCz+lwjSsUrd5M5jsC+BmVMbjjLHM9PpxvO7/Ns9rCLSjl+w6Fy8hsDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:35.570302Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.08414","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edbd55e323c9af2b107933052423d5560f5cfa17e84520bec7e4fd713992aca6","sha256:6dd876295e4f00a61515ee6fdf93e5bad87fcb3e3807f395f8689dfb82161b2e"],"state_sha256":"693b1c09bde683da6b31599121ab437dbdd7e3b2db89efcf05ec19e8392199c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mQFw33rWS1/jPB+TXrfBEZjd5eLx636GfRBispRZ0X3DTpgvVocnhAtYfZ3UcJzD6HNDaVkWMt2o+l+uAgK2Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:49:18.060053Z","bundle_sha256":"7550decd0325468b5ecc35497b70ac9e64a2a977df7b9959b09238bb23f5bf83"}}