{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:M6EPNVCENYUB7XHOGQYSQUXPLK","short_pith_number":"pith:M6EPNVCE","canonical_record":{"source":{"id":"1802.09321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-26T14:34:34Z","cross_cats_sorted":[],"title_canon_sha256":"d82ba1ffd5a81f6bb2bc740191e1f307a162593db565055120ebbb2f5b0bc3b2","abstract_canon_sha256":"b5093a998bb8b2aaf048ec823c0637a8d4a289aea4392b5ce8662e5fa132bbda"},"schema_version":"1.0"},"canonical_sha256":"6788f6d4446e281fdcee34312852ef5ab72bfda6d97794f928e8b5c95c7187f0","source":{"kind":"arxiv","id":"1802.09321","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09321","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09321v1","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09321","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"pith_short_12","alias_value":"M6EPNVCENYUB","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M6EPNVCENYUB7XHO","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M6EPNVCE","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:M6EPNVCENYUB7XHOGQYSQUXPLK","target":"record","payload":{"canonical_record":{"source":{"id":"1802.09321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-26T14:34:34Z","cross_cats_sorted":[],"title_canon_sha256":"d82ba1ffd5a81f6bb2bc740191e1f307a162593db565055120ebbb2f5b0bc3b2","abstract_canon_sha256":"b5093a998bb8b2aaf048ec823c0637a8d4a289aea4392b5ce8662e5fa132bbda"},"schema_version":"1.0"},"canonical_sha256":"6788f6d4446e281fdcee34312852ef5ab72bfda6d97794f928e8b5c95c7187f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:34.074782Z","signature_b64":"DlYHd8MUL3Vt72/K070zcQsVc6UsSP8cDZsHFobarMKC6AwI5wp/xU/S4N/GDZ92uKSnVnTBs1m7ZhPsMFnyAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6788f6d4446e281fdcee34312852ef5ab72bfda6d97794f928e8b5c95c7187f0","last_reissued_at":"2026-05-18T00:22:34.074068Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:34.074068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.09321","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:22:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wGuQUlQRvOCNT28XJjBhhDD6s0nKsK1XV3XxPUe0EaKbl+4P5S2JoPJo1Uv/a/FND1OAk+sc8K7OZ45RE/53CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T05:44:41.987799Z"},"content_sha256":"9b72c247952aa23ad468dd8bdba7aca2ccaeaef103b57538bd591b0df84b3f46","schema_version":"1.0","event_id":"sha256:9b72c247952aa23ad468dd8bdba7aca2ccaeaef103b57538bd591b0df84b3f46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:M6EPNVCENYUB7XHOGQYSQUXPLK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Baseline Dependent Averaging in Radio Interferometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. G. Willis, S. J. Wijnholds, S. Salvini","submitted_at":"2018-02-26T14:34:34Z","abstract_excerpt":"This paper presents a detailed analysis of the applicability and benefits of baseline dependent averaging (BDA) in modern radio interferometers and in particular the Square Kilometre Array (SKA). We demonstrate that BDA does not affect the information content of the data other than a well-defined decorrelation loss for which closed form expressions are readily available. We verify these theoretical findings using simulations. We therefore conclude that BDA can be used reliably in modern radio interferometry allowing a reduction of visibility data volume (and hence processing costs for handling"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09321","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":""},"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":"2026-05-18T00:22:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"STJ7cvS9JYU9CQekOxm4WNs5bnShBa9MCam8A5cdbxLQIIXJW4o79JOHgCxaMiCCqPoCMbNPQoBYRFW4Kh19DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T05:44:41.988129Z"},"content_sha256":"95d3d47cdf84bb27364e046192edc4319d1b057ca524b91bbb7bf5a04723c424","schema_version":"1.0","event_id":"sha256:95d3d47cdf84bb27364e046192edc4319d1b057ca524b91bbb7bf5a04723c424"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/bundle.json","state_url":"https://pith.science/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/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":"2026-06-27T05:44:41Z","links":{"resolver":"https://pith.science/pith/M6EPNVCENYUB7XHOGQYSQUXPLK","bundle":"https://pith.science/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/bundle.json","state":"https://pith.science/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M6EPNVCENYUB7XHOGQYSQUXPLK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M6EPNVCENYUB7XHOGQYSQUXPLK","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":"b5093a998bb8b2aaf048ec823c0637a8d4a289aea4392b5ce8662e5fa132bbda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-26T14:34:34Z","title_canon_sha256":"d82ba1ffd5a81f6bb2bc740191e1f307a162593db565055120ebbb2f5b0bc3b2"},"schema_version":"1.0","source":{"id":"1802.09321","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09321","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09321v1","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09321","created_at":"2026-05-18T00:22:34Z"},{"alias_kind":"pith_short_12","alias_value":"M6EPNVCENYUB","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M6EPNVCENYUB7XHO","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M6EPNVCE","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:95d3d47cdf84bb27364e046192edc4319d1b057ca524b91bbb7bf5a04723c424","target":"graph","created_at":"2026-05-18T00:22:34Z","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":"This paper presents a detailed analysis of the applicability and benefits of baseline dependent averaging (BDA) in modern radio interferometers and in particular the Square Kilometre Array (SKA). We demonstrate that BDA does not affect the information content of the data other than a well-defined decorrelation loss for which closed form expressions are readily available. We verify these theoretical findings using simulations. We therefore conclude that BDA can be used reliably in modern radio interferometry allowing a reduction of visibility data volume (and hence processing costs for handling","authors_text":"A. G. Willis, S. J. Wijnholds, S. Salvini","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-26T14:34:34Z","title":"Baseline Dependent Averaging in Radio Interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09321","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":"sha256:9b72c247952aa23ad468dd8bdba7aca2ccaeaef103b57538bd591b0df84b3f46","target":"record","created_at":"2026-05-18T00:22:34Z","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":"b5093a998bb8b2aaf048ec823c0637a8d4a289aea4392b5ce8662e5fa132bbda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-26T14:34:34Z","title_canon_sha256":"d82ba1ffd5a81f6bb2bc740191e1f307a162593db565055120ebbb2f5b0bc3b2"},"schema_version":"1.0","source":{"id":"1802.09321","kind":"arxiv","version":1}},"canonical_sha256":"6788f6d4446e281fdcee34312852ef5ab72bfda6d97794f928e8b5c95c7187f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6788f6d4446e281fdcee34312852ef5ab72bfda6d97794f928e8b5c95c7187f0","first_computed_at":"2026-05-18T00:22:34.074068Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:34.074068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DlYHd8MUL3Vt72/K070zcQsVc6UsSP8cDZsHFobarMKC6AwI5wp/xU/S4N/GDZ92uKSnVnTBs1m7ZhPsMFnyAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:34.074782Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.09321","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b72c247952aa23ad468dd8bdba7aca2ccaeaef103b57538bd591b0df84b3f46","sha256:95d3d47cdf84bb27364e046192edc4319d1b057ca524b91bbb7bf5a04723c424"],"state_sha256":"2dec1dd258b038d7715d3f62df0d55c883d1a2862026bddc9e6c9c5c3c3e5c6f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0j09Gt97EDGHTR7HzpTbfVfOac+wEYS8a/0njtJFsjBRQft7jl9PkgBhs8Q/TilsJrr0gd0XIFAdKbJQmfkjDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T05:44:41.989935Z","bundle_sha256":"6803fdb0206dce72f7a104ed3a89d95e16b2b125dd575f9488b611533182c8de"}}