{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ZGLLOSZ4GXRGXTEUFUZXD5K3VB","short_pith_number":"pith:ZGLLOSZ4","canonical_record":{"source":{"id":"1306.1626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-06-07T06:20:05Z","cross_cats_sorted":[],"title_canon_sha256":"e345829965c9bab5992ff2c242cd5d830019ae6b54462567eaabcdd5a219bded","abstract_canon_sha256":"e4a5ae2b6270ed8a2ec2dd38bf9cb5dc2e1f4bc5bd434d76cf3e6b3ffa0c584f"},"schema_version":"1.0"},"canonical_sha256":"c996b74b3c35e26bcc942d3371f55ba85e80e4687ada4f3a3371067d12a5ea85","source":{"kind":"arxiv","id":"1306.1626","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1626","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1626v1","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1626","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZGLLOSZ4GXRG","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZGLLOSZ4GXRGXTEU","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZGLLOSZ4","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ZGLLOSZ4GXRGXTEUFUZXD5K3VB","target":"record","payload":{"canonical_record":{"source":{"id":"1306.1626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-06-07T06:20:05Z","cross_cats_sorted":[],"title_canon_sha256":"e345829965c9bab5992ff2c242cd5d830019ae6b54462567eaabcdd5a219bded","abstract_canon_sha256":"e4a5ae2b6270ed8a2ec2dd38bf9cb5dc2e1f4bc5bd434d76cf3e6b3ffa0c584f"},"schema_version":"1.0"},"canonical_sha256":"c996b74b3c35e26bcc942d3371f55ba85e80e4687ada4f3a3371067d12a5ea85","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:32.896479Z","signature_b64":"VbMf74PttIMSqsQ5CkkD5TDVhayZCiszKpKUj2aPZetieK4CApzc7oQtG7XfbbDsqCwZ80kkhb5SYKSIEe0OCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c996b74b3c35e26bcc942d3371f55ba85e80e4687ada4f3a3371067d12a5ea85","last_reissued_at":"2026-05-18T03:21:32.895815Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:32.895815Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.1626","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":"2026-05-18T03:21:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8fXrE6EF7o+XYOpbdpTL2y9yNcx4f6QOWi7p06/FOLUd6v381qYSxmmiR/2p3rQMeKY6/5RgnAuDWPmJv4YGBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:27:23.394117Z"},"content_sha256":"36ae4e3e4e64658c6f55ea01fed7cd86d2cd3b88401b4b187851f74d53f4c4f3","schema_version":"1.0","event_id":"sha256:36ae4e3e4e64658c6f55ea01fed7cd86d2cd3b88401b4b187851f74d53f4c4f3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ZGLLOSZ4GXRGXTEUFUZXD5K3VB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ground Penetrating Radar: Analysis of point diffractors for modeling and inversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.geo-ph","authors_text":"Albane Saintenoy (IDES), A. Tarantola","submitted_at":"2013-06-07T06:20:05Z","abstract_excerpt":"The three electromagnetic properties appearing in Maxwell's equations are dielectric permittivity, electrical conductivity and magnetic permeability. The study of point diffractors in a homogeneous, isotropic, linear medium suggests the use of logarithms to describe the variations of electromagnetic properties in the earth. A small anomaly in electrical properties (permittivity and conductivity) responds to an incident electromagnetic field as an electric dipole, whereas a small anomaly in the magnetic property responds as a magnetic dipole. Neither property variation can be neglected without "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1626","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":"2026-05-18T03:21:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cyuZ2bfozuM9SPmT9Sab5ZC+/hhqG+wZJcG5ZGW7YS3gtvq5iG4pSv5/cQmSb1pr16+O6cevR0+hwmmqDKQoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T11:27:23.394468Z"},"content_sha256":"b6e4e2620e63f859e2f194957c4796997e8514a4dd43223e2525771d5a71f696","schema_version":"1.0","event_id":"sha256:b6e4e2620e63f859e2f194957c4796997e8514a4dd43223e2525771d5a71f696"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/bundle.json","state_url":"https://pith.science/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/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":"2026-06-01T11:27:23Z","links":{"resolver":"https://pith.science/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB","bundle":"https://pith.science/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/bundle.json","state":"https://pith.science/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZGLLOSZ4GXRGXTEUFUZXD5K3VB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ZGLLOSZ4GXRGXTEUFUZXD5K3VB","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":"e4a5ae2b6270ed8a2ec2dd38bf9cb5dc2e1f4bc5bd434d76cf3e6b3ffa0c584f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-06-07T06:20:05Z","title_canon_sha256":"e345829965c9bab5992ff2c242cd5d830019ae6b54462567eaabcdd5a219bded"},"schema_version":"1.0","source":{"id":"1306.1626","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.1626","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.1626v1","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.1626","created_at":"2026-05-18T03:21:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZGLLOSZ4GXRG","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZGLLOSZ4GXRGXTEU","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZGLLOSZ4","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:b6e4e2620e63f859e2f194957c4796997e8514a4dd43223e2525771d5a71f696","target":"graph","created_at":"2026-05-18T03:21:32Z","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":"The three electromagnetic properties appearing in Maxwell's equations are dielectric permittivity, electrical conductivity and magnetic permeability. The study of point diffractors in a homogeneous, isotropic, linear medium suggests the use of logarithms to describe the variations of electromagnetic properties in the earth. A small anomaly in electrical properties (permittivity and conductivity) responds to an incident electromagnetic field as an electric dipole, whereas a small anomaly in the magnetic property responds as a magnetic dipole. Neither property variation can be neglected without ","authors_text":"Albane Saintenoy (IDES), A. Tarantola","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-06-07T06:20:05Z","title":"Ground Penetrating Radar: Analysis of point diffractors for modeling and inversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.1626","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":"sha256:36ae4e3e4e64658c6f55ea01fed7cd86d2cd3b88401b4b187851f74d53f4c4f3","target":"record","created_at":"2026-05-18T03:21:32Z","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":"e4a5ae2b6270ed8a2ec2dd38bf9cb5dc2e1f4bc5bd434d76cf3e6b3ffa0c584f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2013-06-07T06:20:05Z","title_canon_sha256":"e345829965c9bab5992ff2c242cd5d830019ae6b54462567eaabcdd5a219bded"},"schema_version":"1.0","source":{"id":"1306.1626","kind":"arxiv","version":1}},"canonical_sha256":"c996b74b3c35e26bcc942d3371f55ba85e80e4687ada4f3a3371067d12a5ea85","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c996b74b3c35e26bcc942d3371f55ba85e80e4687ada4f3a3371067d12a5ea85","first_computed_at":"2026-05-18T03:21:32.895815Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:32.895815Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VbMf74PttIMSqsQ5CkkD5TDVhayZCiszKpKUj2aPZetieK4CApzc7oQtG7XfbbDsqCwZ80kkhb5SYKSIEe0OCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:32.896479Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.1626","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36ae4e3e4e64658c6f55ea01fed7cd86d2cd3b88401b4b187851f74d53f4c4f3","sha256:b6e4e2620e63f859e2f194957c4796997e8514a4dd43223e2525771d5a71f696"],"state_sha256":"6f838bb3d344ff48cc00fe8af1ffda3448ea00000a3d6cd4b42b6f20db556faa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0yzItqUO+AmwGChuQ0+7auvfevvzEfc6Y46RLquKW4dqWvWT7ZGgPajgsPBvZOYXIZI4tRG8nLDPzTigTID2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T11:27:23.396274Z","bundle_sha256":"b4f83e4ac5332516932ec0b8552fa414dc3b5c9b4c2d6c5f94e43b8574cfcd91"}}