{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:L7UL3FY2ABMBWHWWDJCDJY72N4","short_pith_number":"pith:L7UL3FY2","schema_version":"1.0","canonical_sha256":"5fe8bd971a00581b1ed61a4434e3fa6f359b82aa9f027aea068b8624da769b4e","source":{"kind":"arxiv","id":"1503.05495","version":2},"attestation_state":"computed","paper":{"title":"On evaluation of ShARP passive rainfall retrievals over snow-covered land surfaces and coastal zones","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph"],"primary_cat":"physics.data-an","authors_text":"Ardeshir M. Ebtehaj, Efi Foufoula-Georgiou, Rafael L. Bras","submitted_at":"2015-03-18T17:19:35Z","abstract_excerpt":"For precipitation retrievals over land, using satellite measurements in microwave bands, it is important to properly discriminate the weak rainfall signals from strong and highly variable background surface emission. Traditionally, land rainfall retrieval methods often rely on a weak signal of rainfall scattering on high-frequency channels (85 GHz) and make use of empirical thresholding and regression-based techniques. Due to the increased ground surface signal interference, precipitation retrieval over radiometrically complex land surfaces, especially over snow-covered lands, deserts and coas"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1503.05495","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2015-03-18T17:19:35Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"9fec87b56688665f95acb36d1a3432f23790a7d87b0fe8d60fd3ab4063fc41ba","abstract_canon_sha256":"b94751195e39a8e214fc152d18ddd33e5c516391186676afe2da43b2d6a7e0f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:20:49.150946Z","signature_b64":"lY4CkuN6ZedWF1oNp6DTeskT+EADz2XwQxisaquH81kQIF0jbUMulfgzAbCUskojbPlK9a8DX8f2/wOKIRDFAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fe8bd971a00581b1ed61a4434e3fa6f359b82aa9f027aea068b8624da769b4e","last_reissued_at":"2026-05-18T02:20:49.150276Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:20:49.150276Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On evaluation of ShARP passive rainfall retrievals over snow-covered land surfaces and coastal zones","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph"],"primary_cat":"physics.data-an","authors_text":"Ardeshir M. Ebtehaj, Efi Foufoula-Georgiou, Rafael L. Bras","submitted_at":"2015-03-18T17:19:35Z","abstract_excerpt":"For precipitation retrievals over land, using satellite measurements in microwave bands, it is important to properly discriminate the weak rainfall signals from strong and highly variable background surface emission. Traditionally, land rainfall retrieval methods often rely on a weak signal of rainfall scattering on high-frequency channels (85 GHz) and make use of empirical thresholding and regression-based techniques. Due to the increased ground surface signal interference, precipitation retrieval over radiometrically complex land surfaces, especially over snow-covered lands, deserts and coas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.05495","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1503.05495","created_at":"2026-05-18T02:20:49.150400+00:00"},{"alias_kind":"arxiv_version","alias_value":"1503.05495v2","created_at":"2026-05-18T02:20:49.150400+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.05495","created_at":"2026-05-18T02:20:49.150400+00:00"},{"alias_kind":"pith_short_12","alias_value":"L7UL3FY2ABMB","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_16","alias_value":"L7UL3FY2ABMBWHWW","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_8","alias_value":"L7UL3FY2","created_at":"2026-05-18T12:29:29.992203+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4","json":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4.json","graph_json":"https://pith.science/api/pith-number/L7UL3FY2ABMBWHWWDJCDJY72N4/graph.json","events_json":"https://pith.science/api/pith-number/L7UL3FY2ABMBWHWWDJCDJY72N4/events.json","paper":"https://pith.science/paper/L7UL3FY2"},"agent_actions":{"view_html":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4","download_json":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4.json","view_paper":"https://pith.science/paper/L7UL3FY2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1503.05495&json=true","fetch_graph":"https://pith.science/api/pith-number/L7UL3FY2ABMBWHWWDJCDJY72N4/graph.json","fetch_events":"https://pith.science/api/pith-number/L7UL3FY2ABMBWHWWDJCDJY72N4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4/action/storage_attestation","attest_author":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4/action/author_attestation","sign_citation":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4/action/citation_signature","submit_replication":"https://pith.science/pith/L7UL3FY2ABMBWHWWDJCDJY72N4/action/replication_record"}},"created_at":"2026-05-18T02:20:49.150400+00:00","updated_at":"2026-05-18T02:20:49.150400+00:00"}