{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:EXTITO5CTHPI7FVRDI6ZAALIWF","short_pith_number":"pith:EXTITO5C","canonical_record":{"source":{"id":"2008.05752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2020-08-13T08:28:40Z","cross_cats_sorted":[],"title_canon_sha256":"cc37860b3c443a8f9257877bc42d2e91eba498a50f390aa4bd4a36d2f734bdb8","abstract_canon_sha256":"95efe4378f1cfcce971dd1aca00417fda35447c15411c55469f0cc82db9bc280"},"schema_version":"1.0"},"canonical_sha256":"25e689bba299de8f96b11a3d900168b173a8bbcd1ecdee243da8d6a539330111","source":{"kind":"arxiv","id":"2008.05752","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.05752","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"arxiv_version","alias_value":"2008.05752v1","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.05752","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_12","alias_value":"EXTITO5CTHPI","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"EXTITO5CTHPI7FVR","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"EXTITO5C","created_at":"2026-07-05T01:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:EXTITO5CTHPI7FVRDI6ZAALIWF","target":"record","payload":{"canonical_record":{"source":{"id":"2008.05752","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2020-08-13T08:28:40Z","cross_cats_sorted":[],"title_canon_sha256":"cc37860b3c443a8f9257877bc42d2e91eba498a50f390aa4bd4a36d2f734bdb8","abstract_canon_sha256":"95efe4378f1cfcce971dd1aca00417fda35447c15411c55469f0cc82db9bc280"},"schema_version":"1.0"},"canonical_sha256":"25e689bba299de8f96b11a3d900168b173a8bbcd1ecdee243da8d6a539330111","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:26:56.906254Z","signature_b64":"UE60vY1tAV7WDXE2KI9EyTeUbINghLcKFd72+lZOM0ZaSKXX17KQFLLaTwPHch0KMytyTBAbNTBkrIeHa3ONCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25e689bba299de8f96b11a3d900168b173a8bbcd1ecdee243da8d6a539330111","last_reissued_at":"2026-07-05T01:26:56.905816Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:26:56.905816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.05752","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":"2026-07-05T01:26:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mA1obvrBisSwJN5xXMpQPpeNR5FDA5nATUKn6dM68WOgzbTOzzW5KS+60a3VwwTkj7TKpH/z2rHita5HTcccDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:29:30.550981Z"},"content_sha256":"92474cd5d37422c88ce0577a26517905cecc76f316c1414213e19f0d3e3e255f","schema_version":"1.0","event_id":"sha256:92474cd5d37422c88ce0577a26517905cecc76f316c1414213e19f0d3e3e255f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:EXTITO5CTHPI7FVRDI6ZAALIWF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravity field modeling using space frequency signal transfer technique between satellites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.geo-ph","authors_text":"Shuangxi Zhang, Wenbin Shen, Xinyu Xu, Ziyu Shen","submitted_at":"2020-08-13T08:28:40Z","abstract_excerpt":"Here we provide an alternative approach to determine the Earth's external gravitational potential field based on low-orbit target satellite (TS), geostationary satellites (GS), and microwave signal links between them. By emitting and receiving frequency signals controlled by precise clocks between TS and GS, we can determine the gravitational potential (GP) at the TS orbit. We set the TS with polar orbits, altitude of around 500 km above ground, and three evenly distributed GSs with equatorial orbits, altitudes of around 35000 km from the Earth's center. In this case, at any time the TS can be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.05752","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/2008.05752/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":"2026-07-05T01:26:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5GwnGVN+oI/jZd9CIUXcao9Iv7KYa2i8emLTLf+bmfd8eeaxCZu13GFxuG73U/ltiy+X7iCBKYT1LcJ1X73WBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:29:30.551540Z"},"content_sha256":"544a3f0aa45ca4206d2c9a369be6eed60aa8914bbaee75f8d4a0b79a1d1fd957","schema_version":"1.0","event_id":"sha256:544a3f0aa45ca4206d2c9a369be6eed60aa8914bbaee75f8d4a0b79a1d1fd957"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/bundle.json","state_url":"https://pith.science/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/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":"2026-08-05T19:29:30Z","links":{"resolver":"https://pith.science/pith/EXTITO5CTHPI7FVRDI6ZAALIWF","bundle":"https://pith.science/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/bundle.json","state":"https://pith.science/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EXTITO5CTHPI7FVRDI6ZAALIWF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:EXTITO5CTHPI7FVRDI6ZAALIWF","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":"95efe4378f1cfcce971dd1aca00417fda35447c15411c55469f0cc82db9bc280","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2020-08-13T08:28:40Z","title_canon_sha256":"cc37860b3c443a8f9257877bc42d2e91eba498a50f390aa4bd4a36d2f734bdb8"},"schema_version":"1.0","source":{"id":"2008.05752","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.05752","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"arxiv_version","alias_value":"2008.05752v1","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.05752","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_12","alias_value":"EXTITO5CTHPI","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"EXTITO5CTHPI7FVR","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"EXTITO5C","created_at":"2026-07-05T01:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:544a3f0aa45ca4206d2c9a369be6eed60aa8914bbaee75f8d4a0b79a1d1fd957","target":"graph","created_at":"2026-07-05T01:26:56Z","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/2008.05752/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Here we provide an alternative approach to determine the Earth's external gravitational potential field based on low-orbit target satellite (TS), geostationary satellites (GS), and microwave signal links between them. By emitting and receiving frequency signals controlled by precise clocks between TS and GS, we can determine the gravitational potential (GP) at the TS orbit. We set the TS with polar orbits, altitude of around 500 km above ground, and three evenly distributed GSs with equatorial orbits, altitudes of around 35000 km from the Earth's center. In this case, at any time the TS can be","authors_text":"Shuangxi Zhang, Wenbin Shen, Xinyu Xu, Ziyu Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2020-08-13T08:28:40Z","title":"Gravity field modeling using space frequency signal transfer technique between satellites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.05752","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":"sha256:92474cd5d37422c88ce0577a26517905cecc76f316c1414213e19f0d3e3e255f","target":"record","created_at":"2026-07-05T01:26:56Z","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":"95efe4378f1cfcce971dd1aca00417fda35447c15411c55469f0cc82db9bc280","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2020-08-13T08:28:40Z","title_canon_sha256":"cc37860b3c443a8f9257877bc42d2e91eba498a50f390aa4bd4a36d2f734bdb8"},"schema_version":"1.0","source":{"id":"2008.05752","kind":"arxiv","version":1}},"canonical_sha256":"25e689bba299de8f96b11a3d900168b173a8bbcd1ecdee243da8d6a539330111","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25e689bba299de8f96b11a3d900168b173a8bbcd1ecdee243da8d6a539330111","first_computed_at":"2026-07-05T01:26:56.905816Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:26:56.905816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UE60vY1tAV7WDXE2KI9EyTeUbINghLcKFd72+lZOM0ZaSKXX17KQFLLaTwPHch0KMytyTBAbNTBkrIeHa3ONCw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:26:56.906254Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.05752","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92474cd5d37422c88ce0577a26517905cecc76f316c1414213e19f0d3e3e255f","sha256:544a3f0aa45ca4206d2c9a369be6eed60aa8914bbaee75f8d4a0b79a1d1fd957"],"state_sha256":"bc42c77ebe280ba0a5665cc25f5b99d6d428bfe1afef223e8b62c4199ef4fede"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ew8HjrAEVqD4vFw8JAenaOxGKod14iUQgjFAXeyp0yOpVVySlmiB9oFImblY4JEB+SBdAbX1npOI8JFNuM+TAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T19:29:30.556592Z","bundle_sha256":"94c2407146deed0cb1620c0dacd37511d6b7028a990098378e1bab1ac36d9e9e"}}