{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:IB4AMKABTCRNK46TI3FTP2X6HH","short_pith_number":"pith:IB4AMKAB","canonical_record":{"source":{"id":"2109.08781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2021-09-17T23:17:12Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"2107a3b2e2eeccd26741d812919e40337d341bce2b652b8b0daba08ebe2d28fc","abstract_canon_sha256":"11f7158a3d5847d2a57f81c93a9b7256e8548daa2e82b82725efd6a62923892e"},"schema_version":"1.0"},"canonical_sha256":"407806280198a2d573d346cb37eafe39cc52c71fd19a13a3c6b014c0b6c7daf6","source":{"kind":"arxiv","id":"2109.08781","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.08781","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"2109.08781v1","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.08781","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"IB4AMKABTCRN","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_16","alias_value":"IB4AMKABTCRNK46T","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_8","alias_value":"IB4AMKAB","created_at":"2026-07-05T03:15:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:IB4AMKABTCRNK46TI3FTP2X6HH","target":"record","payload":{"canonical_record":{"source":{"id":"2109.08781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2021-09-17T23:17:12Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"2107a3b2e2eeccd26741d812919e40337d341bce2b652b8b0daba08ebe2d28fc","abstract_canon_sha256":"11f7158a3d5847d2a57f81c93a9b7256e8548daa2e82b82725efd6a62923892e"},"schema_version":"1.0"},"canonical_sha256":"407806280198a2d573d346cb37eafe39cc52c71fd19a13a3c6b014c0b6c7daf6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:15:38.420061Z","signature_b64":"8gHKf00g+d4OmSKLYmhA9lHXYXIOPgEj0KU0ZMjWmdmHJ8KlfofZMO7FUIsStyUPxTnCAU6vVmbJnC4QK5ULAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"407806280198a2d573d346cb37eafe39cc52c71fd19a13a3c6b014c0b6c7daf6","last_reissued_at":"2026-07-05T03:15:38.419591Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:15:38.419591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.08781","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":"2026-07-05T03:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lIYdkoc6VDjoVVsLyAD19gSi42V0gI/AxIVb+KMRyEekGFh2USoQOQY6ojtboRcpIt1dES5VZNXrXFC3+mVXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T21:24:17.832546Z"},"content_sha256":"2b750ae16bfca528ea73c9e3cc88e695a6ec255182df75592dd9007b1840373f","schema_version":"1.0","event_id":"sha256:2b750ae16bfca528ea73c9e3cc88e695a6ec255182df75592dd9007b1840373f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:IB4AMKABTCRNK46TI3FTP2X6HH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Minimum-fuel Spacecraft Rendezvous based on Sparsity Promoting Optimization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Efstathios Bakolas, Vrushabh Zinage","submitted_at":"2021-09-17T23:17:12Z","abstract_excerpt":"In this paper, we consider the classical spacecraft rendezvous problem in which the so-called active spacecraft has to approach the target spacecraft which is moving in an elliptical orbit around a planet by using the minimum possible amount of fuel. Instead of using standard convex optimization tools which can be computationally expensive, we use modified versions of the Iteratively Reweighted Least Squares (IRLS) algorithm from compressive sensing to compute sparse optimal control sequences which minimize the fuel consumption for both thrust vectoring and orthogonal vectoring (active) spacec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.08781","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/2109.08781/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":"2026-07-05T03:15:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SXVuNPx79qDiM6VfU8gN1cUJCmDvf1If0B79eqCz8c35+o/f9lW4mSy68PNyGjfAQr7Dpc7qqtnc2+GrbxqVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T21:24:17.832922Z"},"content_sha256":"7d0af4039f9b29aadbffe34eefc1f6e3786b67d21922e67cde394d9992518e19","schema_version":"1.0","event_id":"sha256:7d0af4039f9b29aadbffe34eefc1f6e3786b67d21922e67cde394d9992518e19"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IB4AMKABTCRNK46TI3FTP2X6HH/bundle.json","state_url":"https://pith.science/pith/IB4AMKABTCRNK46TI3FTP2X6HH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IB4AMKABTCRNK46TI3FTP2X6HH/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":"2026-07-08T21:24:17Z","links":{"resolver":"https://pith.science/pith/IB4AMKABTCRNK46TI3FTP2X6HH","bundle":"https://pith.science/pith/IB4AMKABTCRNK46TI3FTP2X6HH/bundle.json","state":"https://pith.science/pith/IB4AMKABTCRNK46TI3FTP2X6HH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IB4AMKABTCRNK46TI3FTP2X6HH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:IB4AMKABTCRNK46TI3FTP2X6HH","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":"11f7158a3d5847d2a57f81c93a9b7256e8548daa2e82b82725efd6a62923892e","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2021-09-17T23:17:12Z","title_canon_sha256":"2107a3b2e2eeccd26741d812919e40337d341bce2b652b8b0daba08ebe2d28fc"},"schema_version":"1.0","source":{"id":"2109.08781","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.08781","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"arxiv_version","alias_value":"2109.08781v1","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.08781","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_12","alias_value":"IB4AMKABTCRN","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_16","alias_value":"IB4AMKABTCRNK46T","created_at":"2026-07-05T03:15:38Z"},{"alias_kind":"pith_short_8","alias_value":"IB4AMKAB","created_at":"2026-07-05T03:15:38Z"}],"graph_snapshots":[{"event_id":"sha256:7d0af4039f9b29aadbffe34eefc1f6e3786b67d21922e67cde394d9992518e19","target":"graph","created_at":"2026-07-05T03:15:38Z","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/2109.08781/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we consider the classical spacecraft rendezvous problem in which the so-called active spacecraft has to approach the target spacecraft which is moving in an elliptical orbit around a planet by using the minimum possible amount of fuel. Instead of using standard convex optimization tools which can be computationally expensive, we use modified versions of the Iteratively Reweighted Least Squares (IRLS) algorithm from compressive sensing to compute sparse optimal control sequences which minimize the fuel consumption for both thrust vectoring and orthogonal vectoring (active) spacec","authors_text":"Efstathios Bakolas, Vrushabh Zinage","cross_cats":["cs.SY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2021-09-17T23:17:12Z","title":"Minimum-fuel Spacecraft Rendezvous based on Sparsity Promoting Optimization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.08781","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":"sha256:2b750ae16bfca528ea73c9e3cc88e695a6ec255182df75592dd9007b1840373f","target":"record","created_at":"2026-07-05T03:15:38Z","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":"11f7158a3d5847d2a57f81c93a9b7256e8548daa2e82b82725efd6a62923892e","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2021-09-17T23:17:12Z","title_canon_sha256":"2107a3b2e2eeccd26741d812919e40337d341bce2b652b8b0daba08ebe2d28fc"},"schema_version":"1.0","source":{"id":"2109.08781","kind":"arxiv","version":1}},"canonical_sha256":"407806280198a2d573d346cb37eafe39cc52c71fd19a13a3c6b014c0b6c7daf6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"407806280198a2d573d346cb37eafe39cc52c71fd19a13a3c6b014c0b6c7daf6","first_computed_at":"2026-07-05T03:15:38.419591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:15:38.419591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8gHKf00g+d4OmSKLYmhA9lHXYXIOPgEj0KU0ZMjWmdmHJ8KlfofZMO7FUIsStyUPxTnCAU6vVmbJnC4QK5ULAA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:15:38.420061Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.08781","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b750ae16bfca528ea73c9e3cc88e695a6ec255182df75592dd9007b1840373f","sha256:7d0af4039f9b29aadbffe34eefc1f6e3786b67d21922e67cde394d9992518e19"],"state_sha256":"1507d0a61ffffb2a41f8079c6c4083e62d7c2a08e86ace0db1e568e355847fd0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"01hxHhjH0nClAbngIimEUCjYvd4QzaVLwcMg18hdxDbUBnpTZC5HC8dOwZJz52s2lldc81zDJWAKl01LJ0lvDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T21:24:17.835120Z","bundle_sha256":"f6132be14c91c0776b340fd2404db9be1744b4a3108bad91d73a966c30f5900c"}}