{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:YTJP2IUYQ67QW4VQBLMSOBET6O","short_pith_number":"pith:YTJP2IUY","canonical_record":{"source":{"id":"1703.00537","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-01T22:35:23Z","cross_cats_sorted":[],"title_canon_sha256":"4093ce0bcbe1998f4cb12c148d6e5fb1d5dc6e980ef75360b2da7ab50e79ede6","abstract_canon_sha256":"f23cac5f351eab81bfbbc3d5df87b2194769ddaa2794d38242348808190177af"},"schema_version":"1.0"},"canonical_sha256":"c4d2fd229887bf0b72b00ad9270493f3a1064a18bfc2631ab86bebc07f64c16e","source":{"kind":"arxiv","id":"1703.00537","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00537","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00537v2","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00537","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"pith_short_12","alias_value":"YTJP2IUYQ67Q","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YTJP2IUYQ67QW4VQ","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YTJP2IUY","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:YTJP2IUYQ67QW4VQBLMSOBET6O","target":"record","payload":{"canonical_record":{"source":{"id":"1703.00537","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-01T22:35:23Z","cross_cats_sorted":[],"title_canon_sha256":"4093ce0bcbe1998f4cb12c148d6e5fb1d5dc6e980ef75360b2da7ab50e79ede6","abstract_canon_sha256":"f23cac5f351eab81bfbbc3d5df87b2194769ddaa2794d38242348808190177af"},"schema_version":"1.0"},"canonical_sha256":"c4d2fd229887bf0b72b00ad9270493f3a1064a18bfc2631ab86bebc07f64c16e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:30.386842Z","signature_b64":"/g6DnlpKmNPtGrQF350r+B5vTwuiiVLOL0Fjd46qppZqcWOMYHxZcjD1KKZRwAiLbqWC5rTMeelaOoB3Yue/AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4d2fd229887bf0b72b00ad9270493f3a1064a18bfc2631ab86bebc07f64c16e","last_reissued_at":"2026-05-18T00:26:30.385800Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:30.385800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.00537","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":"2026-05-18T00:26:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"klY4b+yClDYz6niea5L1NHTV/qEy/IwpWGp3cg28cht0lN0lzGugJm/FjjmghOZLnz1UqpkPRkNXqaxdvDq+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:05:26.995909Z"},"content_sha256":"09f1ab30af6d2abb290bbca84fe417ec358ec4462280ae2e969b5254293c13fe","schema_version":"1.0","event_id":"sha256:09f1ab30af6d2abb290bbca84fe417ec358ec4462280ae2e969b5254293c13fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:YTJP2IUYQ67QW4VQBLMSOBET6O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SKA Aperture Array Verification System: Electromagnetic modeling and beam pattern measurements using a micro UAV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Lingua, E. Colin-Beltran, E. de Lera Acedo, F. Paonessa, G. Naldi, G. Pupillo, G. Virone, I. Aicardi, J. Monari, M. Piras, N. Razavi-Ghods, P. Bolli, P. Maschio","submitted_at":"2017-03-01T22:35:23Z","abstract_excerpt":"In this paper we present the electromagnetic modeling and beam pattern measurements of a 16-elements ultra wideband sparse random test array for the low frequency instrument of the Square Kilometer Array telescope. We discuss the importance of a small array test platform for the development of technologies and techniques towards the final telescope, highlighting the most relevant aspects of its design. We also describe the electromagnetic simulations and modeling work as well as the embedded-element and array pattern measurements using an Unmanned Aerial Vehicle system. The latter are helpful "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00537","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":"2026-05-18T00:26:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FRefdo6H3hlc/mJ32yMbt4d0J3eWD+JSgnHQEpT1ltNiDWA3xWH+3mFWbueswI0QP/cwWSGEg9jvics0GuIhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:05:26.996294Z"},"content_sha256":"3d8c5941aa48576d722024e2fa86a171ce45086a6c184a93e5e2a9d4941fe3f9","schema_version":"1.0","event_id":"sha256:3d8c5941aa48576d722024e2fa86a171ce45086a6c184a93e5e2a9d4941fe3f9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/bundle.json","state_url":"https://pith.science/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/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":"2026-05-25T04:05:26Z","links":{"resolver":"https://pith.science/pith/YTJP2IUYQ67QW4VQBLMSOBET6O","bundle":"https://pith.science/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/bundle.json","state":"https://pith.science/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YTJP2IUYQ67QW4VQBLMSOBET6O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YTJP2IUYQ67QW4VQBLMSOBET6O","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":"f23cac5f351eab81bfbbc3d5df87b2194769ddaa2794d38242348808190177af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-01T22:35:23Z","title_canon_sha256":"4093ce0bcbe1998f4cb12c148d6e5fb1d5dc6e980ef75360b2da7ab50e79ede6"},"schema_version":"1.0","source":{"id":"1703.00537","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00537","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00537v2","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00537","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"pith_short_12","alias_value":"YTJP2IUYQ67Q","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YTJP2IUYQ67QW4VQ","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YTJP2IUY","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:3d8c5941aa48576d722024e2fa86a171ce45086a6c184a93e5e2a9d4941fe3f9","target":"graph","created_at":"2026-05-18T00:26:30Z","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":"In this paper we present the electromagnetic modeling and beam pattern measurements of a 16-elements ultra wideband sparse random test array for the low frequency instrument of the Square Kilometer Array telescope. We discuss the importance of a small array test platform for the development of technologies and techniques towards the final telescope, highlighting the most relevant aspects of its design. We also describe the electromagnetic simulations and modeling work as well as the embedded-element and array pattern measurements using an Unmanned Aerial Vehicle system. The latter are helpful ","authors_text":"A. Lingua, E. Colin-Beltran, E. de Lera Acedo, F. Paonessa, G. Naldi, G. Pupillo, G. Virone, I. Aicardi, J. Monari, M. Piras, N. Razavi-Ghods, P. Bolli, P. Maschio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-01T22:35:23Z","title":"SKA Aperture Array Verification System: Electromagnetic modeling and beam pattern measurements using a micro UAV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00537","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":"sha256:09f1ab30af6d2abb290bbca84fe417ec358ec4462280ae2e969b5254293c13fe","target":"record","created_at":"2026-05-18T00:26:30Z","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":"f23cac5f351eab81bfbbc3d5df87b2194769ddaa2794d38242348808190177af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-03-01T22:35:23Z","title_canon_sha256":"4093ce0bcbe1998f4cb12c148d6e5fb1d5dc6e980ef75360b2da7ab50e79ede6"},"schema_version":"1.0","source":{"id":"1703.00537","kind":"arxiv","version":2}},"canonical_sha256":"c4d2fd229887bf0b72b00ad9270493f3a1064a18bfc2631ab86bebc07f64c16e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4d2fd229887bf0b72b00ad9270493f3a1064a18bfc2631ab86bebc07f64c16e","first_computed_at":"2026-05-18T00:26:30.385800Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:30.385800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/g6DnlpKmNPtGrQF350r+B5vTwuiiVLOL0Fjd46qppZqcWOMYHxZcjD1KKZRwAiLbqWC5rTMeelaOoB3Yue/AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:30.386842Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.00537","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09f1ab30af6d2abb290bbca84fe417ec358ec4462280ae2e969b5254293c13fe","sha256:3d8c5941aa48576d722024e2fa86a171ce45086a6c184a93e5e2a9d4941fe3f9"],"state_sha256":"045242650547a8792b361986328e5bc48f5e7f917111f98e87fcbe88995be128"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rwwy0dLz9M1nc0JJHVGVMkIDAX5mRgLQBzddvdJD9aK5sHxvR7ilkqUDqNWHs70zJsGndfdQfid+PGKMYjRaBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T04:05:26.998579Z","bundle_sha256":"4e05b6a10758bf2296c964d74a41444c8491583bc24214847d0eac2dc96811cf"}}