{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:RNCSMOIILQVBMWE33XRB2OANOG","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":"0d9e1ee3b29bc30c528f0aa592db988fe973665914cdbbf90d15dc125a863fad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-04-08T18:00:02Z","title_canon_sha256":"70cef882c35b17c7e7d75e641b34fec88a1adeb355d9c11b805d8b761de85aa1"},"schema_version":"1.0","source":{"id":"2204.04230","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.04230","created_at":"2026-07-05T04:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"2204.04230v1","created_at":"2026-07-05T04:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.04230","created_at":"2026-07-05T04:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"RNCSMOIILQVB","created_at":"2026-07-05T04:12:54Z"},{"alias_kind":"pith_short_16","alias_value":"RNCSMOIILQVBMWE3","created_at":"2026-07-05T04:12:54Z"},{"alias_kind":"pith_short_8","alias_value":"RNCSMOII","created_at":"2026-07-05T04:12:54Z"}],"graph_snapshots":[{"event_id":"sha256:2a593ce6636c1747622f7447429f23d1a46740dc1beac5fe0343ce24daa17b4e","target":"graph","created_at":"2026-07-05T04:12:54Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2204.04230/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Radio interferometers, which are designed to observe astrophysical objects in the universe, can also be used to study the Earth's ionosphere. Radio interferometers like the Giant Metrewave Radio Telescope (GMRT) detect variations in ionospheric total electron content (TEC) on a much wider spatial scale at a relatively higher sensitivity than traditional ionospheric probes like the Global Navigation Satellite System (GNSS). The hybrid configuration of the GMRT (compact core and extended arms) and its geographical location make this interferometer an excellent candidate to explore the sensitive ","authors_text":"Abhirup Datta, Sarvesh Mangla","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-04-08T18:00:02Z","title":"Study of the equatorial ionosphere using the Giant Metrewave Radio Telescope (GMRT) at sub-GHz frequencies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.04230","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":"sha256:32de1c6dc9fe60ca598b5052e7d16f3a38b947dafecde6abf60d298e81ba3d75","target":"record","created_at":"2026-07-05T04:12:54Z","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":"0d9e1ee3b29bc30c528f0aa592db988fe973665914cdbbf90d15dc125a863fad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-04-08T18:00:02Z","title_canon_sha256":"70cef882c35b17c7e7d75e641b34fec88a1adeb355d9c11b805d8b761de85aa1"},"schema_version":"1.0","source":{"id":"2204.04230","kind":"arxiv","version":1}},"canonical_sha256":"8b452639085c2a16589bdde21d380d71b22f1f6916ec4ecdb6e232983be3d285","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b452639085c2a16589bdde21d380d71b22f1f6916ec4ecdb6e232983be3d285","first_computed_at":"2026-07-05T04:12:54.720191Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:54.720191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZCYwiwlk6tIY8dR+uQPOn79FO9VU6I1JtWikN1zR6Wwp2VNcNQHTJof6400/iiOL65q6VWID1uPVEQ+mCGi9Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:54.720635Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.04230","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:32de1c6dc9fe60ca598b5052e7d16f3a38b947dafecde6abf60d298e81ba3d75","sha256:2a593ce6636c1747622f7447429f23d1a46740dc1beac5fe0343ce24daa17b4e"],"state_sha256":"ecdb014c6e22188a9d2a1a9935ea84c1dcd08b9ad8d9b940cf3230e725cfce7f"}