{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:MS7DBYFEO5OL7KS7CENATLGGAH","short_pith_number":"pith:MS7DBYFE","canonical_record":{"source":{"id":"2005.02600","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2020-05-06T05:34:11Z","cross_cats_sorted":[],"title_canon_sha256":"53d497a612b57088879a90beee04be386197393b4fe9489347879c964a98b7f9","abstract_canon_sha256":"2f626c4f135284e54c70d11cd671866fd5e1e12baa024f8fba0b893f3c862b9d"},"schema_version":"1.0"},"canonical_sha256":"64be30e0a4775cbfaa5f111a09acc601f0b545a0ab31f0b79a05497aa2d42f40","source":{"kind":"arxiv","id":"2005.02600","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.02600","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"arxiv_version","alias_value":"2005.02600v1","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.02600","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_12","alias_value":"MS7DBYFEO5OL","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_16","alias_value":"MS7DBYFEO5OL7KS7","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_8","alias_value":"MS7DBYFE","created_at":"2026-07-05T01:00:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:MS7DBYFEO5OL7KS7CENATLGGAH","target":"record","payload":{"canonical_record":{"source":{"id":"2005.02600","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2020-05-06T05:34:11Z","cross_cats_sorted":[],"title_canon_sha256":"53d497a612b57088879a90beee04be386197393b4fe9489347879c964a98b7f9","abstract_canon_sha256":"2f626c4f135284e54c70d11cd671866fd5e1e12baa024f8fba0b893f3c862b9d"},"schema_version":"1.0"},"canonical_sha256":"64be30e0a4775cbfaa5f111a09acc601f0b545a0ab31f0b79a05497aa2d42f40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:00:54.173611Z","signature_b64":"oqL6GKxDulhaoCCN1y71oTqt96waRXcsof4BFhTjCYBICXos7Arl853aEXG+vgNGMien3GhRgEODYzsuGOLuDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64be30e0a4775cbfaa5f111a09acc601f0b545a0ab31f0b79a05497aa2d42f40","last_reissued_at":"2026-07-05T01:00:54.173161Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:00:54.173161Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.02600","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":"2026-07-05T01:00:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kNX282qsHh9ja4rIeoHzK3c5oRIP8E1Uq0lJD2xmnAUxUMgkomlSI16ISUyM5zExoSi+9ZzWlr3X3DiOmP5SAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T23:37:06.832749Z"},"content_sha256":"1d5bf17b5582182a896a7e15b8a14e51f23b6df4ad38dd0db0c115df5874abe5","schema_version":"1.0","event_id":"sha256:1d5bf17b5582182a896a7e15b8a14e51f23b6df4ad38dd0db0c115df5874abe5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:MS7DBYFEO5OL7KS7CENATLGGAH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Experimental Study on Airborne Landmine Detection Using a Circular Synthetic Aperture Radar","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Christian Waldschmidt, Markus Schartel, Ralf Burr, Rik B\\\"ahnemann, Winfried Mayer","submitted_at":"2020-05-06T05:34:11Z","abstract_excerpt":"Many countries in the world are contaminated with landmines. Several thousand casualties occur every year. Although there are certain types of mines that can be detected from a safe stand-off position with tools, humanitarian demining is still mostly done by hand. As a new approach, an unmanned aerial system (UAS) equipped with a ground penetrating synthetic aperture radar (GPSAR) was developed, which is used to detect landmines, cluster munition, grenades, and improvised explosive devices (IEDs). The measurement system consists of a multicopter, a total station, an inertial measurement unit ("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.02600","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2005.02600/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:00:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TV4Nx+j3xy7AlthsvEXs+wMIPyj/GS9n+4E/MDohB4OFU3si0l8mfAkK2O+8GirFJae/liFljxTdo4RceFKQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T23:37:06.833126Z"},"content_sha256":"9af99bae70943ee1842bd4058952809c0a10c949bc1ede30c4ca4ef3182ff0c8","schema_version":"1.0","event_id":"sha256:9af99bae70943ee1842bd4058952809c0a10c949bc1ede30c4ca4ef3182ff0c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MS7DBYFEO5OL7KS7CENATLGGAH/bundle.json","state_url":"https://pith.science/pith/MS7DBYFEO5OL7KS7CENATLGGAH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MS7DBYFEO5OL7KS7CENATLGGAH/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":"2026-07-08T23:37:06Z","links":{"resolver":"https://pith.science/pith/MS7DBYFEO5OL7KS7CENATLGGAH","bundle":"https://pith.science/pith/MS7DBYFEO5OL7KS7CENATLGGAH/bundle.json","state":"https://pith.science/pith/MS7DBYFEO5OL7KS7CENATLGGAH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MS7DBYFEO5OL7KS7CENATLGGAH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:MS7DBYFEO5OL7KS7CENATLGGAH","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":"2f626c4f135284e54c70d11cd671866fd5e1e12baa024f8fba0b893f3c862b9d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2020-05-06T05:34:11Z","title_canon_sha256":"53d497a612b57088879a90beee04be386197393b4fe9489347879c964a98b7f9"},"schema_version":"1.0","source":{"id":"2005.02600","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.02600","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"arxiv_version","alias_value":"2005.02600v1","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.02600","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_12","alias_value":"MS7DBYFEO5OL","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_16","alias_value":"MS7DBYFEO5OL7KS7","created_at":"2026-07-05T01:00:54Z"},{"alias_kind":"pith_short_8","alias_value":"MS7DBYFE","created_at":"2026-07-05T01:00:54Z"}],"graph_snapshots":[{"event_id":"sha256:9af99bae70943ee1842bd4058952809c0a10c949bc1ede30c4ca4ef3182ff0c8","target":"graph","created_at":"2026-07-05T01:00:54Z","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/2005.02600/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Many countries in the world are contaminated with landmines. Several thousand casualties occur every year. Although there are certain types of mines that can be detected from a safe stand-off position with tools, humanitarian demining is still mostly done by hand. As a new approach, an unmanned aerial system (UAS) equipped with a ground penetrating synthetic aperture radar (GPSAR) was developed, which is used to detect landmines, cluster munition, grenades, and improvised explosive devices (IEDs). The measurement system consists of a multicopter, a total station, an inertial measurement unit (","authors_text":"Christian Waldschmidt, Markus Schartel, Ralf Burr, Rik B\\\"ahnemann, Winfried Mayer","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2020-05-06T05:34:11Z","title":"An Experimental Study on Airborne Landmine Detection Using a Circular Synthetic Aperture Radar"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.02600","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":"sha256:1d5bf17b5582182a896a7e15b8a14e51f23b6df4ad38dd0db0c115df5874abe5","target":"record","created_at":"2026-07-05T01:00:54Z","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":"2f626c4f135284e54c70d11cd671866fd5e1e12baa024f8fba0b893f3c862b9d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"eess.SP","submitted_at":"2020-05-06T05:34:11Z","title_canon_sha256":"53d497a612b57088879a90beee04be386197393b4fe9489347879c964a98b7f9"},"schema_version":"1.0","source":{"id":"2005.02600","kind":"arxiv","version":1}},"canonical_sha256":"64be30e0a4775cbfaa5f111a09acc601f0b545a0ab31f0b79a05497aa2d42f40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64be30e0a4775cbfaa5f111a09acc601f0b545a0ab31f0b79a05497aa2d42f40","first_computed_at":"2026-07-05T01:00:54.173161Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:00:54.173161Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oqL6GKxDulhaoCCN1y71oTqt96waRXcsof4BFhTjCYBICXos7Arl853aEXG+vgNGMien3GhRgEODYzsuGOLuDA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:00:54.173611Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.02600","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d5bf17b5582182a896a7e15b8a14e51f23b6df4ad38dd0db0c115df5874abe5","sha256:9af99bae70943ee1842bd4058952809c0a10c949bc1ede30c4ca4ef3182ff0c8"],"state_sha256":"d4c24a1a4b83422acbf3b8710559c323a0a4b97f53ace9a840bc135db7821c58"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8okhmlOGlgMlromT/1e+LHWBeY4MoWe0WjeGMS4rs48fTfjeVvkRyGfx2z0j2/7FeadBNo21k7F2QlQhfLZTBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T23:37:06.835406Z","bundle_sha256":"0a33a69a1f2abd50339eb8768e3c502ea731a22b21ac9bd901bc9958a63300fe"}}