{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:6PXDU6V4PYC7Z3PFIDSZYTYNVZ","short_pith_number":"pith:6PXDU6V4","canonical_record":{"source":{"id":"1109.4645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2011-09-20T16:32:24Z","cross_cats_sorted":[],"title_canon_sha256":"99194317e7bfc5c409b12baa7c3068b2e84c1fc6d0ad653f04296a473dc0fb04","abstract_canon_sha256":"8c56436bf26e7d44e4166db12f3db9d270154b72d6b0d5e4e69d1b2c014fceff"},"schema_version":"1.0"},"canonical_sha256":"f3ee3a7abc7e05fcede540e59c4f0dae70209a0136b9645e8a0c397a087f1df1","source":{"kind":"arxiv","id":"1109.4645","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4645","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4645v1","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4645","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"pith_short_12","alias_value":"6PXDU6V4PYC7","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6PXDU6V4PYC7Z3PF","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6PXDU6V4","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:6PXDU6V4PYC7Z3PFIDSZYTYNVZ","target":"record","payload":{"canonical_record":{"source":{"id":"1109.4645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2011-09-20T16:32:24Z","cross_cats_sorted":[],"title_canon_sha256":"99194317e7bfc5c409b12baa7c3068b2e84c1fc6d0ad653f04296a473dc0fb04","abstract_canon_sha256":"8c56436bf26e7d44e4166db12f3db9d270154b72d6b0d5e4e69d1b2c014fceff"},"schema_version":"1.0"},"canonical_sha256":"f3ee3a7abc7e05fcede540e59c4f0dae70209a0136b9645e8a0c397a087f1df1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:33.285910Z","signature_b64":"smvERenjyWBKxHbTF+NKf+GGwMs8QK5qJ9267SX2JJwXtjj7Uj2kjpsXr+uuROp6p/HXOWRXiIJiSPte/b+eAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3ee3a7abc7e05fcede540e59c4f0dae70209a0136b9645e8a0c397a087f1df1","last_reissued_at":"2026-05-18T04:12:33.285397Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:33.285397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.4645","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":"2026-05-18T04:12:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T6HeRjsqUex1gOd52AEbKiu9OdL+qg0zx0reKWmcMezdlM4f2JKonosGT3lfV++x+RhT817OyGz2NIpxby01Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:14:33.311566Z"},"content_sha256":"0b623160dd6778008dfaa84c5c9b05bbd7f8dd0e1e9a5a80f5bfe908b2d310e1","schema_version":"1.0","event_id":"sha256:0b623160dd6778008dfaa84c5c9b05bbd7f8dd0e1e9a5a80f5bfe908b2d310e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:6PXDU6V4PYC7Z3PFIDSZYTYNVZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interferometric Observations of Geosynchronous Satellites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.space-ph","authors_text":"C.R. Subrahmanya, Peeyush Prasad, R. Somashekar","submitted_at":"2011-09-20T16:32:24Z","abstract_excerpt":"In recent years, a large number of geosynchronous satellites are being planned to provide augmentation services for enhancing the precision to global positioning systems, e.g., GPS, in applications such as aircraft landing. In this paper, we present a scheme for co-locating passive satellite observational facilities with a radio astronomy facility to open a new possibility of providing valuable data for radio astronomical imaging, ionospheric studies and satellite orbit estimation."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4645","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":"2026-05-18T04:12:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y/hAL0W9GVVyAO9eA8nXWOUtcXlUS8FuWp0I2oUUkmq7x2758yKlZwygK3O/Vt5sT+Klo7GpDuz80IKzuR6NBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T21:14:33.312114Z"},"content_sha256":"fa513a33bb965ad9a72467f14197e1a71073a8cd03800856848c00c630e9a614","schema_version":"1.0","event_id":"sha256:fa513a33bb965ad9a72467f14197e1a71073a8cd03800856848c00c630e9a614"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/bundle.json","state_url":"https://pith.science/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/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":"2026-06-06T21:14:33Z","links":{"resolver":"https://pith.science/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ","bundle":"https://pith.science/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/bundle.json","state":"https://pith.science/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6PXDU6V4PYC7Z3PFIDSZYTYNVZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6PXDU6V4PYC7Z3PFIDSZYTYNVZ","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":"8c56436bf26e7d44e4166db12f3db9d270154b72d6b0d5e4e69d1b2c014fceff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2011-09-20T16:32:24Z","title_canon_sha256":"99194317e7bfc5c409b12baa7c3068b2e84c1fc6d0ad653f04296a473dc0fb04"},"schema_version":"1.0","source":{"id":"1109.4645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4645","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4645v1","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4645","created_at":"2026-05-18T04:12:33Z"},{"alias_kind":"pith_short_12","alias_value":"6PXDU6V4PYC7","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6PXDU6V4PYC7Z3PF","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6PXDU6V4","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:fa513a33bb965ad9a72467f14197e1a71073a8cd03800856848c00c630e9a614","target":"graph","created_at":"2026-05-18T04:12:33Z","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 recent years, a large number of geosynchronous satellites are being planned to provide augmentation services for enhancing the precision to global positioning systems, e.g., GPS, in applications such as aircraft landing. In this paper, we present a scheme for co-locating passive satellite observational facilities with a radio astronomy facility to open a new possibility of providing valuable data for radio astronomical imaging, ionospheric studies and satellite orbit estimation.","authors_text":"C.R. Subrahmanya, Peeyush Prasad, R. Somashekar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2011-09-20T16:32:24Z","title":"Interferometric Observations of Geosynchronous Satellites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4645","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":"sha256:0b623160dd6778008dfaa84c5c9b05bbd7f8dd0e1e9a5a80f5bfe908b2d310e1","target":"record","created_at":"2026-05-18T04:12:33Z","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":"8c56436bf26e7d44e4166db12f3db9d270154b72d6b0d5e4e69d1b2c014fceff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2011-09-20T16:32:24Z","title_canon_sha256":"99194317e7bfc5c409b12baa7c3068b2e84c1fc6d0ad653f04296a473dc0fb04"},"schema_version":"1.0","source":{"id":"1109.4645","kind":"arxiv","version":1}},"canonical_sha256":"f3ee3a7abc7e05fcede540e59c4f0dae70209a0136b9645e8a0c397a087f1df1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3ee3a7abc7e05fcede540e59c4f0dae70209a0136b9645e8a0c397a087f1df1","first_computed_at":"2026-05-18T04:12:33.285397Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:33.285397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"smvERenjyWBKxHbTF+NKf+GGwMs8QK5qJ9267SX2JJwXtjj7Uj2kjpsXr+uuROp6p/HXOWRXiIJiSPte/b+eAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:33.285910Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.4645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0b623160dd6778008dfaa84c5c9b05bbd7f8dd0e1e9a5a80f5bfe908b2d310e1","sha256:fa513a33bb965ad9a72467f14197e1a71073a8cd03800856848c00c630e9a614"],"state_sha256":"a6104bc21fc294b7a041e6d118cb4f9ad245cb23c4ee9b755e3fc04ab732d77e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AJxxmGhhiwk8yI4qpicvDuluuQlI5/WgR+RVW5l9U5C8ANqj79XvsRA+hJjHpNwWaDTbmA61FWkmA5EJ3bGmBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T21:14:33.315124Z","bundle_sha256":"08455f585503b36b1d8a4cf65a0a29772bc337c966e3cc2040c8e9f74f36b2eb"}}