{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:RIVLUDYKULZMAJ5DWTDGGFMSF3","short_pith_number":"pith:RIVLUDYK","canonical_record":{"source":{"id":"1210.5309","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-19T03:55:03Z","cross_cats_sorted":[],"title_canon_sha256":"5320ea79573c00a13b2d37df2cd159f0a0e31cec233c293d4d0bee96d6bba6bd","abstract_canon_sha256":"7436791a74c22d815a1e44d8ceb64e7e7c8568b31e00f1cae26edf7e5a8e90cd"},"schema_version":"1.0"},"canonical_sha256":"8a2aba0f0aa2f2c027a3b4c66315922ee3694c314ee44c54f2ab5fcf01dde0b3","source":{"kind":"arxiv","id":"1210.5309","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.5309","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"arxiv_version","alias_value":"1210.5309v1","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.5309","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"pith_short_12","alias_value":"RIVLUDYKULZM","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RIVLUDYKULZMAJ5D","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RIVLUDYK","created_at":"2026-05-18T12:27:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:RIVLUDYKULZMAJ5DWTDGGFMSF3","target":"record","payload":{"canonical_record":{"source":{"id":"1210.5309","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-19T03:55:03Z","cross_cats_sorted":[],"title_canon_sha256":"5320ea79573c00a13b2d37df2cd159f0a0e31cec233c293d4d0bee96d6bba6bd","abstract_canon_sha256":"7436791a74c22d815a1e44d8ceb64e7e7c8568b31e00f1cae26edf7e5a8e90cd"},"schema_version":"1.0"},"canonical_sha256":"8a2aba0f0aa2f2c027a3b4c66315922ee3694c314ee44c54f2ab5fcf01dde0b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:46.146245Z","signature_b64":"uQ7+ZF5liniH0jZcOhctwZhLSmVCH+oKpFLjoklUAS8ZyIUKvtOlaHEAr8zvb4ULJUn2S5F9jTG4m05O94dEDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a2aba0f0aa2f2c027a3b4c66315922ee3694c314ee44c54f2ab5fcf01dde0b3","last_reissued_at":"2026-05-18T01:53:46.145566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:46.145566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.5309","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":"2026-05-18T01:53:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"By+9Ap8HqnMG7C41HR0ebLUVCXdI8kRJI7YiI9daCo2bH4GNa2OIQSsn6CH3ieKVVPINefETaVU8D39TvQygAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:17:50.869446Z"},"content_sha256":"1ef6603d6137c49f6aa25f645bb64e59fccca142fa8ac4b5b3c08969b8c4ba39","schema_version":"1.0","event_id":"sha256:1ef6603d6137c49f6aa25f645bb64e59fccca142fa8ac4b5b3c08969b8c4ba39"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:RIVLUDYKULZMAJ5DWTDGGFMSF3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"225 GHz Atmospheric Opacity Measurements from Two Arctic Sites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"(2) SAO, (3) National Severe Storms Laboratory, (4) HIA), C.-P. Chen (1), D. Turner (3), E. Steinbring (4) ((1) ASIAA, K. Asada (1), M. Inoue (1), M.-T. Chen (1), P. Martin-Cocher (1), S. Matsushita (1), S. Paine (2)","submitted_at":"2012-10-19T03:55:03Z","abstract_excerpt":"We report the latest results of 225 GHz atmospheric opacity measurements from two arctic sites; one on high coastal terrain near the Eureka weather station, on Ellesmere Island, Canada, and the other at the Summit Station near the peak of the Greenland icecap. This is a campaign to search for a site to deploy a new telescope for submillimeter Very Long Baseline Interferometry and THz astronomy in the northern hemisphere. Since 2011, we have obtained 3 months of winter data near Eureka, and about one year of data at the Summit Station. The results indicate that these sites offer a highly transp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.5309","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":"2026-05-18T01:53:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dqgp0tPOV3Z9drdhwI5WrIcr+utFrOlUY+JDXetcsHfoiCGn09hRmjnIPCUzLkltGmkeFuoHvWJ5tHbtX+ucCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:17:50.870150Z"},"content_sha256":"9ddc0cc705b40546481498ff73832eb096d2b9a294dc5e06f6c47b8ea7a365d8","schema_version":"1.0","event_id":"sha256:9ddc0cc705b40546481498ff73832eb096d2b9a294dc5e06f6c47b8ea7a365d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/bundle.json","state_url":"https://pith.science/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/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":"2026-05-26T20:17:50Z","links":{"resolver":"https://pith.science/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3","bundle":"https://pith.science/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/bundle.json","state":"https://pith.science/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RIVLUDYKULZMAJ5DWTDGGFMSF3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:RIVLUDYKULZMAJ5DWTDGGFMSF3","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":"7436791a74c22d815a1e44d8ceb64e7e7c8568b31e00f1cae26edf7e5a8e90cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-19T03:55:03Z","title_canon_sha256":"5320ea79573c00a13b2d37df2cd159f0a0e31cec233c293d4d0bee96d6bba6bd"},"schema_version":"1.0","source":{"id":"1210.5309","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.5309","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"arxiv_version","alias_value":"1210.5309v1","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.5309","created_at":"2026-05-18T01:53:46Z"},{"alias_kind":"pith_short_12","alias_value":"RIVLUDYKULZM","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RIVLUDYKULZMAJ5D","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RIVLUDYK","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:9ddc0cc705b40546481498ff73832eb096d2b9a294dc5e06f6c47b8ea7a365d8","target":"graph","created_at":"2026-05-18T01:53:46Z","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 report the latest results of 225 GHz atmospheric opacity measurements from two arctic sites; one on high coastal terrain near the Eureka weather station, on Ellesmere Island, Canada, and the other at the Summit Station near the peak of the Greenland icecap. This is a campaign to search for a site to deploy a new telescope for submillimeter Very Long Baseline Interferometry and THz astronomy in the northern hemisphere. Since 2011, we have obtained 3 months of winter data near Eureka, and about one year of data at the Summit Station. The results indicate that these sites offer a highly transp","authors_text":"(2) SAO, (3) National Severe Storms Laboratory, (4) HIA), C.-P. Chen (1), D. Turner (3), E. Steinbring (4) ((1) ASIAA, K. Asada (1), M. Inoue (1), M.-T. Chen (1), P. Martin-Cocher (1), S. Matsushita (1), S. Paine (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-19T03:55:03Z","title":"225 GHz Atmospheric Opacity Measurements from Two Arctic Sites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.5309","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":"sha256:1ef6603d6137c49f6aa25f645bb64e59fccca142fa8ac4b5b3c08969b8c4ba39","target":"record","created_at":"2026-05-18T01:53:46Z","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":"7436791a74c22d815a1e44d8ceb64e7e7c8568b31e00f1cae26edf7e5a8e90cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-19T03:55:03Z","title_canon_sha256":"5320ea79573c00a13b2d37df2cd159f0a0e31cec233c293d4d0bee96d6bba6bd"},"schema_version":"1.0","source":{"id":"1210.5309","kind":"arxiv","version":1}},"canonical_sha256":"8a2aba0f0aa2f2c027a3b4c66315922ee3694c314ee44c54f2ab5fcf01dde0b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a2aba0f0aa2f2c027a3b4c66315922ee3694c314ee44c54f2ab5fcf01dde0b3","first_computed_at":"2026-05-18T01:53:46.145566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:46.145566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uQ7+ZF5liniH0jZcOhctwZhLSmVCH+oKpFLjoklUAS8ZyIUKvtOlaHEAr8zvb4ULJUn2S5F9jTG4m05O94dEDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:46.146245Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.5309","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ef6603d6137c49f6aa25f645bb64e59fccca142fa8ac4b5b3c08969b8c4ba39","sha256:9ddc0cc705b40546481498ff73832eb096d2b9a294dc5e06f6c47b8ea7a365d8"],"state_sha256":"a6b3354eab1d40cff4092c5844826e9a71a82def7b3751cea8c500e87626ee00"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LpWTYbynjwriPE6YtVqE7Tz63to6o1ikZoP1s8BMGK+VzwkeC7OAsg1QsTJfySumw1kYZ4etRPpmmzyiImecCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:17:50.873641Z","bundle_sha256":"14bd53c06d712e6975060c9dbebbf027c8ccae16707e5cbf77b51ff88710b671"}}