{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GMZUIXKAUGE2TQ3J6AAFBROEAY","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":"031e536382061e49f3d5bd1827880d5cda0d67b794658e4126c55e11c2c381d5","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2018-07-21T08:51:17Z","title_canon_sha256":"a3c7e5bf4eb49f55826544542633256789ba0f0aabe180f69e2092d907460086"},"schema_version":"1.0","source":{"id":"1807.08109","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.08109","created_at":"2026-06-04T19:12:08Z"},{"alias_kind":"arxiv_version","alias_value":"1807.08109v2","created_at":"2026-06-04T19:12:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.08109","created_at":"2026-06-04T19:12:08Z"},{"alias_kind":"pith_short_12","alias_value":"GMZUIXKAUGE2","created_at":"2026-06-04T19:12:08Z"},{"alias_kind":"pith_short_16","alias_value":"GMZUIXKAUGE2TQ3J","created_at":"2026-06-04T19:12:08Z"},{"alias_kind":"pith_short_8","alias_value":"GMZUIXKA","created_at":"2026-06-04T19:12:08Z"}],"graph_snapshots":[{"event_id":"sha256:d88dbbee6a05c3452472c298273b8310a0365f76925d72b8a5b8c93ea0fd2b58","target":"graph","created_at":"2026-06-04T19:12:08Z","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/1807.08109/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, the repeat-groundtrack orbit maintenance problem is addressed for spacecraft driven by electric propulsion. An adaptive solution is proposed, which combines an hysteresis controller and a recursive least squares filter. The controller provides a pulse-width modulated command to the thruster, in compliance with the peculiarities of the electric propulsion technology. The filter takes care of estimating a set of environmental disturbance parameters, from inertial position and velocity measurements. The resulting control scheme is able to compensate for the groundtrack drift due to","authors_text":"Andrea Garulli, Antonio Giannitrapani, Fabrizio Scortecci, Mirko Leomanni","cross_cats":["cs.SY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2018-07-21T08:51:17Z","title":"An Adaptive Groundtrack Maintenance Scheme for Spacecraft with Electric Propulsion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.08109","kind":"arxiv","version":2},"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":"sha256:13342c39de2ee567ba1a39b60b884dc42c2adf9f2f997647c9c28116aaf1aaaa","target":"record","created_at":"2026-06-04T19:12:08Z","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":"031e536382061e49f3d5bd1827880d5cda0d67b794658e4126c55e11c2c381d5","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2018-07-21T08:51:17Z","title_canon_sha256":"a3c7e5bf4eb49f55826544542633256789ba0f0aabe180f69e2092d907460086"},"schema_version":"1.0","source":{"id":"1807.08109","kind":"arxiv","version":2}},"canonical_sha256":"3333445d40a189a9c369f00050c5c40607c7366dc009a7a94b058795a7155e35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3333445d40a189a9c369f00050c5c40607c7366dc009a7a94b058795a7155e35","first_computed_at":"2026-06-04T19:12:08.644979Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T19:12:08.644979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"V+/7o9OlExQzWJsq+16eRtAhv3Zg6lvGFtiAyjSfh6SNGeq2NBtMvv98lTg2ZOqWedGKF4v8YfJit09+Gv1QAQ==","signature_status":"signed_v1","signed_at":"2026-06-04T19:12:08.645473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.08109","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:13342c39de2ee567ba1a39b60b884dc42c2adf9f2f997647c9c28116aaf1aaaa","sha256:d88dbbee6a05c3452472c298273b8310a0365f76925d72b8a5b8c93ea0fd2b58"],"state_sha256":"c533b353da19fcf7deb86c06ec8092e1855ee3552929b7108d213d21e0bd6dab"}