{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:DXULCPMW6A6WLFGSWM3HR35QA2","short_pith_number":"pith:DXULCPMW","canonical_record":{"source":{"id":"1708.08760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2017-08-24T17:40:38Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"0fc270d104bde1edebfa772b050b003d7f84c3e80b82e82f2fa8507a00b85376","abstract_canon_sha256":"3fb8c571e815f7d6cb3d21679dee3418605cee47f2496d287c964dbf15d5741d"},"schema_version":"1.0"},"canonical_sha256":"1de8b13d96f03d6594d2b33678efb006a36b318187046e503c04e9c910cef6d9","source":{"kind":"arxiv","id":"1708.08760","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08760","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08760v1","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08760","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"pith_short_12","alias_value":"DXULCPMW6A6W","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"DXULCPMW6A6WLFGS","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"DXULCPMW","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:DXULCPMW6A6WLFGSWM3HR35QA2","target":"record","payload":{"canonical_record":{"source":{"id":"1708.08760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2017-08-24T17:40:38Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"0fc270d104bde1edebfa772b050b003d7f84c3e80b82e82f2fa8507a00b85376","abstract_canon_sha256":"3fb8c571e815f7d6cb3d21679dee3418605cee47f2496d287c964dbf15d5741d"},"schema_version":"1.0"},"canonical_sha256":"1de8b13d96f03d6594d2b33678efb006a36b318187046e503c04e9c910cef6d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:36:25.742401Z","signature_b64":"hFatx69prNW6OKprzt9NvckFOwa09VmPEIg8hT08q8ne80r/viwC0Do4xw3oo61tWcG++yHtlB20JoRH78ouBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1de8b13d96f03d6594d2b33678efb006a36b318187046e503c04e9c910cef6d9","last_reissued_at":"2026-05-18T00:36:25.741656Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:36:25.741656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.08760","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":"2026-05-18T00:36:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2LwhwUJnNNH2nwgATXLU0lfT5fkp2MdyJAiRcbROni3aT/qjSJSSMgEqsrxXZu5zROMuTockLuLt4bSsR4yfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:46:20.307977Z"},"content_sha256":"7b97fc30d4b139d3b9951372f2ed4a974ab0acba606c038a0c7e7fc7241132ec","schema_version":"1.0","event_id":"sha256:7b97fc30d4b139d3b9951372f2ed4a974ab0acba606c038a0c7e7fc7241132ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:DXULCPMW6A6WLFGSWM3HR35QA2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of Clear Sky Models for Singapore","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"physics.ao-ph","authors_text":"Shilpa Manandhar, Soumyabrata Dev, Stefan Winkler, Yee Hui Lee","submitted_at":"2017-08-24T17:40:38Z","abstract_excerpt":"The estimation of total solar irradiance falling on the earth's surface is important in the field of solar energy generation and forecasting. Several clear-sky solar radiation models have been developed over the last few decades. Most of these models are based on empirical distribution of various geographical parameters; while a few models consider various atmospheric effects in the solar energy estimation. In this paper, we perform a comparative analysis of several popular clear-sky models, in the tropical region of Singapore. This is important in countries like Singapore, where we are primar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08760","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":"2026-05-18T00:36:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b1CDHnGKgdBb2nVemHrQiEiW3wByXKrRfAzsdSJas1R0jEfvi2tlmePR9jttp7bah7VQWd6Z1Pc3bdGl6LJNBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:46:20.308764Z"},"content_sha256":"8d8df012deba54d463c93aa140dc436cde3fc810f766f06d6b33435a49dc38fc","schema_version":"1.0","event_id":"sha256:8d8df012deba54d463c93aa140dc436cde3fc810f766f06d6b33435a49dc38fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DXULCPMW6A6WLFGSWM3HR35QA2/bundle.json","state_url":"https://pith.science/pith/DXULCPMW6A6WLFGSWM3HR35QA2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DXULCPMW6A6WLFGSWM3HR35QA2/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":"2026-06-11T08:46:20Z","links":{"resolver":"https://pith.science/pith/DXULCPMW6A6WLFGSWM3HR35QA2","bundle":"https://pith.science/pith/DXULCPMW6A6WLFGSWM3HR35QA2/bundle.json","state":"https://pith.science/pith/DXULCPMW6A6WLFGSWM3HR35QA2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DXULCPMW6A6WLFGSWM3HR35QA2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:DXULCPMW6A6WLFGSWM3HR35QA2","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":"3fb8c571e815f7d6cb3d21679dee3418605cee47f2496d287c964dbf15d5741d","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2017-08-24T17:40:38Z","title_canon_sha256":"0fc270d104bde1edebfa772b050b003d7f84c3e80b82e82f2fa8507a00b85376"},"schema_version":"1.0","source":{"id":"1708.08760","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08760","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08760v1","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08760","created_at":"2026-05-18T00:36:25Z"},{"alias_kind":"pith_short_12","alias_value":"DXULCPMW6A6W","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"DXULCPMW6A6WLFGS","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"DXULCPMW","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:8d8df012deba54d463c93aa140dc436cde3fc810f766f06d6b33435a49dc38fc","target":"graph","created_at":"2026-05-18T00:36:25Z","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 estimation of total solar irradiance falling on the earth's surface is important in the field of solar energy generation and forecasting. Several clear-sky solar radiation models have been developed over the last few decades. Most of these models are based on empirical distribution of various geographical parameters; while a few models consider various atmospheric effects in the solar energy estimation. In this paper, we perform a comparative analysis of several popular clear-sky models, in the tropical region of Singapore. This is important in countries like Singapore, where we are primar","authors_text":"Shilpa Manandhar, Soumyabrata Dev, Stefan Winkler, Yee Hui Lee","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2017-08-24T17:40:38Z","title":"Study of Clear Sky Models for Singapore"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08760","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":"sha256:7b97fc30d4b139d3b9951372f2ed4a974ab0acba606c038a0c7e7fc7241132ec","target":"record","created_at":"2026-05-18T00:36:25Z","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":"3fb8c571e815f7d6cb3d21679dee3418605cee47f2496d287c964dbf15d5741d","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ao-ph","submitted_at":"2017-08-24T17:40:38Z","title_canon_sha256":"0fc270d104bde1edebfa772b050b003d7f84c3e80b82e82f2fa8507a00b85376"},"schema_version":"1.0","source":{"id":"1708.08760","kind":"arxiv","version":1}},"canonical_sha256":"1de8b13d96f03d6594d2b33678efb006a36b318187046e503c04e9c910cef6d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1de8b13d96f03d6594d2b33678efb006a36b318187046e503c04e9c910cef6d9","first_computed_at":"2026-05-18T00:36:25.741656Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:25.741656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hFatx69prNW6OKprzt9NvckFOwa09VmPEIg8hT08q8ne80r/viwC0Do4xw3oo61tWcG++yHtlB20JoRH78ouBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:25.742401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.08760","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b97fc30d4b139d3b9951372f2ed4a974ab0acba606c038a0c7e7fc7241132ec","sha256:8d8df012deba54d463c93aa140dc436cde3fc810f766f06d6b33435a49dc38fc"],"state_sha256":"4f162a035e833fdd5889e918eeb2e09a2170ef6166794b8f786ea18c04b16056"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IXbAw3j0WNjeuP3lK2u55iGENbGyhn2TMOCPxpAY/YboWUVruzxaHvSBdYd6VdGBVyo9wgR50NmLKLfPOJe5CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T08:46:20.313159Z","bundle_sha256":"b8e699dcf529c8b94a0a81da15641fb3b52ab8da4446c5cc9159a90ce56293f7"}}