{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:CDCGOVRKMKTEJHJU2KHKCZNF3X","short_pith_number":"pith:CDCGOVRK","canonical_record":{"source":{"id":"0710.4244","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-23T11:45:31Z","cross_cats_sorted":[],"title_canon_sha256":"a4cf3377ea740a78379ef33744c60c9f5d5c79cafacfd9f4b84178fa7b3ed5b0","abstract_canon_sha256":"612b119ca84f1ef17374b94f29404936b0ee87417cc9306c5c336d0929a476cc"},"schema_version":"1.0"},"canonical_sha256":"10c467562a62a6449d34d28ea165a5ddf4de0134177778c2143573f4d950f53e","source":{"kind":"arxiv","id":"0710.4244","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.4244","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"arxiv_version","alias_value":"0710.4244v2","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.4244","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"pith_short_12","alias_value":"CDCGOVRKMKTE","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"CDCGOVRKMKTEJHJU","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"CDCGOVRK","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:CDCGOVRKMKTEJHJU2KHKCZNF3X","target":"record","payload":{"canonical_record":{"source":{"id":"0710.4244","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-23T11:45:31Z","cross_cats_sorted":[],"title_canon_sha256":"a4cf3377ea740a78379ef33744c60c9f5d5c79cafacfd9f4b84178fa7b3ed5b0","abstract_canon_sha256":"612b119ca84f1ef17374b94f29404936b0ee87417cc9306c5c336d0929a476cc"},"schema_version":"1.0"},"canonical_sha256":"10c467562a62a6449d34d28ea165a5ddf4de0134177778c2143573f4d950f53e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:58.828917Z","signature_b64":"DqNgW88rCfTAVba7M1bwvGpRKPeH2B2su9o+3JOEppT7brS5097SHsCj8yaux+rIkkT9pMglZa5RKdCknxN6AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10c467562a62a6449d34d28ea165a5ddf4de0134177778c2143573f4d950f53e","last_reissued_at":"2026-05-18T00:57:58.828272Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:58.828272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0710.4244","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":"2026-05-18T00:57:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UQ2aCGrsvCuAHS/NQNG4/LtNgB8ZAGP2jsSsMEttYS6vJ25ocwNcO1gxks+zE1OFlgpr+JylqbpN9lD/dULACg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:50:19.337376Z"},"content_sha256":"bf5db25a1a49e6c2258f632f488146895aff9f6ac6abb1cc47555c26acc59767","schema_version":"1.0","event_id":"sha256:bf5db25a1a49e6c2258f632f488146895aff9f6ac6abb1cc47555c26acc59767"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:CDCGOVRKMKTEJHJU2KHKCZNF3X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-Field Radio Holography of Large Reflector Antennas","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. A. Lopez-Perez, J. G. Mangum, J. W. M. Baars, R. Lucas","submitted_at":"2007-10-23T11:45:31Z","abstract_excerpt":"We summarise the mathematical foundation of the holographic method of measuring the reflector profile of an antenna or radio telescope. In particular, we treat the case, where the signal source is located at a finite distance from the antenna under test, necessitating the inclusion of the so-called Fresnel field terms in the radiation integrals. We assume a ``full phase'' system with reference receiver to provide the reference phase. We describe in some detail the hardware and software implementation of the system used for the holographic measurement of the 12m ALMA prototype submillimeter ant"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.4244","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":"2026-05-18T00:57:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mE6KlxnhWTzSZHvnXG3pKMmYk35GK7jyvZjMjemLpjgvRIE6KYLCPvZ8ih0FovDlvWg4gIX5xdGFRXmGZCCNBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T14:50:19.338111Z"},"content_sha256":"53662d64f7415e19161579fb905ea4486e9b822e44389ceaafdbd960240690ed","schema_version":"1.0","event_id":"sha256:53662d64f7415e19161579fb905ea4486e9b822e44389ceaafdbd960240690ed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/bundle.json","state_url":"https://pith.science/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/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":"2026-05-24T14:50:19Z","links":{"resolver":"https://pith.science/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X","bundle":"https://pith.science/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/bundle.json","state":"https://pith.science/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CDCGOVRKMKTEJHJU2KHKCZNF3X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:CDCGOVRKMKTEJHJU2KHKCZNF3X","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":"612b119ca84f1ef17374b94f29404936b0ee87417cc9306c5c336d0929a476cc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-23T11:45:31Z","title_canon_sha256":"a4cf3377ea740a78379ef33744c60c9f5d5c79cafacfd9f4b84178fa7b3ed5b0"},"schema_version":"1.0","source":{"id":"0710.4244","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.4244","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"arxiv_version","alias_value":"0710.4244v2","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.4244","created_at":"2026-05-18T00:57:58Z"},{"alias_kind":"pith_short_12","alias_value":"CDCGOVRKMKTE","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"CDCGOVRKMKTEJHJU","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"CDCGOVRK","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:53662d64f7415e19161579fb905ea4486e9b822e44389ceaafdbd960240690ed","target":"graph","created_at":"2026-05-18T00:57:58Z","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"},"paper":{"abstract_excerpt":"We summarise the mathematical foundation of the holographic method of measuring the reflector profile of an antenna or radio telescope. In particular, we treat the case, where the signal source is located at a finite distance from the antenna under test, necessitating the inclusion of the so-called Fresnel field terms in the radiation integrals. We assume a ``full phase'' system with reference receiver to provide the reference phase. We describe in some detail the hardware and software implementation of the system used for the holographic measurement of the 12m ALMA prototype submillimeter ant","authors_text":"J. A. Lopez-Perez, J. G. Mangum, J. W. M. Baars, R. Lucas","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-10-23T11:45:31Z","title":"Near-Field Radio Holography of Large Reflector Antennas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.4244","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:bf5db25a1a49e6c2258f632f488146895aff9f6ac6abb1cc47555c26acc59767","target":"record","created_at":"2026-05-18T00:57:58Z","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":"612b119ca84f1ef17374b94f29404936b0ee87417cc9306c5c336d0929a476cc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-23T11:45:31Z","title_canon_sha256":"a4cf3377ea740a78379ef33744c60c9f5d5c79cafacfd9f4b84178fa7b3ed5b0"},"schema_version":"1.0","source":{"id":"0710.4244","kind":"arxiv","version":2}},"canonical_sha256":"10c467562a62a6449d34d28ea165a5ddf4de0134177778c2143573f4d950f53e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10c467562a62a6449d34d28ea165a5ddf4de0134177778c2143573f4d950f53e","first_computed_at":"2026-05-18T00:57:58.828272Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:58.828272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DqNgW88rCfTAVba7M1bwvGpRKPeH2B2su9o+3JOEppT7brS5097SHsCj8yaux+rIkkT9pMglZa5RKdCknxN6AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:58.828917Z","signed_message":"canonical_sha256_bytes"},"source_id":"0710.4244","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf5db25a1a49e6c2258f632f488146895aff9f6ac6abb1cc47555c26acc59767","sha256:53662d64f7415e19161579fb905ea4486e9b822e44389ceaafdbd960240690ed"],"state_sha256":"1fd1c55dcf23b77085789904a6e91e2da4cc28cb5ad97e43d3642e5d471daa0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OcMgEzrnpwljyy4GUdGlUISBSLd+IdXbjQfQhuyfb/ZG7v3876ntRX+1UEgCk5Geb1UN8UmOHspX62x4g0daDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T14:50:19.341795Z","bundle_sha256":"1ec28a26acd193ee781b327a3785f8bcaa1d71cdc87a6b2a2f36c64efe23e044"}}