{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:73EQV6HVYTMWN7LAKVPY7YN75F","short_pith_number":"pith:73EQV6HV","schema_version":"1.0","canonical_sha256":"fec90af8f5c4d966fd60555f8fe1bfe95fb0bd72400635a2a18ef92b70850332","source":{"kind":"arxiv","id":"1706.08863","version":1},"attestation_state":"computed","paper":{"title":"OCTAD-S: Digital Fast Fourier Transform Spectrometers by FPGA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Hiromitsu Ishibashi, Kazumasa Iwai, Kenichi Harada, Kenji Ema, Takahiro Naoi, Yoshinori Hayashi, Yuichi Chikahiro, Y\\^uki Kubo","submitted_at":"2017-06-27T14:00:31Z","abstract_excerpt":"We have developed a digital fast Fourier transform (FFT) spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The base instrument has independent ADC and FPGA modules, which allow us to implement different spectrometers in a relatively easy manner. Two types of spectrometers have been instrumented, one with 4.096 GS/s sampling speed and 2048 frequency channels and the other with 2.048 GS/s sampling speed and 32768 frequency channels. The signal processing in these spectrometers has no dead time and the accumulated spectra are recorded in externa"},"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":"1706.08863","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-06-27T14:00:31Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"13d31defa478da5075f06032c7475a40e9c53c7a2207d4cf9dafe9340b0b57c0","abstract_canon_sha256":"74858faf9d08928b8f153f910a79986e408f26d80539dc3b39f93621e3001e7d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:31.217690Z","signature_b64":"3BVatUUXgAnd0EWV7tqtUaZNWqavrwXt/xc4YQ3HqiNWh3yVLGvsLEGaoAYwc4hebz2Uguisz+WNBPX/CpCKBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fec90af8f5c4d966fd60555f8fe1bfe95fb0bd72400635a2a18ef92b70850332","last_reissued_at":"2026-05-18T00:39:31.216887Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:31.216887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"OCTAD-S: Digital Fast Fourier Transform Spectrometers by FPGA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Hiromitsu Ishibashi, Kazumasa Iwai, Kenichi Harada, Kenji Ema, Takahiro Naoi, Yoshinori Hayashi, Yuichi Chikahiro, Y\\^uki Kubo","submitted_at":"2017-06-27T14:00:31Z","abstract_excerpt":"We have developed a digital fast Fourier transform (FFT) spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The base instrument has independent ADC and FPGA modules, which allow us to implement different spectrometers in a relatively easy manner. Two types of spectrometers have been instrumented, one with 4.096 GS/s sampling speed and 2048 frequency channels and the other with 2.048 GS/s sampling speed and 32768 frequency channels. The signal processing in these spectrometers has no dead time and the accumulated spectra are recorded in externa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.08863","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1706.08863","created_at":"2026-05-18T00:39:31.217015+00:00"},{"alias_kind":"arxiv_version","alias_value":"1706.08863v1","created_at":"2026-05-18T00:39:31.217015+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.08863","created_at":"2026-05-18T00:39:31.217015+00:00"},{"alias_kind":"pith_short_12","alias_value":"73EQV6HVYTMW","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_16","alias_value":"73EQV6HVYTMWN7LA","created_at":"2026-05-18T12:31:03.183658+00:00"},{"alias_kind":"pith_short_8","alias_value":"73EQV6HV","created_at":"2026-05-18T12:31:03.183658+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/73EQV6HVYTMWN7LAKVPY7YN75F","json":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F.json","graph_json":"https://pith.science/api/pith-number/73EQV6HVYTMWN7LAKVPY7YN75F/graph.json","events_json":"https://pith.science/api/pith-number/73EQV6HVYTMWN7LAKVPY7YN75F/events.json","paper":"https://pith.science/paper/73EQV6HV"},"agent_actions":{"view_html":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F","download_json":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F.json","view_paper":"https://pith.science/paper/73EQV6HV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1706.08863&json=true","fetch_graph":"https://pith.science/api/pith-number/73EQV6HVYTMWN7LAKVPY7YN75F/graph.json","fetch_events":"https://pith.science/api/pith-number/73EQV6HVYTMWN7LAKVPY7YN75F/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F/action/timestamp_anchor","attest_storage":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F/action/storage_attestation","attest_author":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F/action/author_attestation","sign_citation":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F/action/citation_signature","submit_replication":"https://pith.science/pith/73EQV6HVYTMWN7LAKVPY7YN75F/action/replication_record"}},"created_at":"2026-05-18T00:39:31.217015+00:00","updated_at":"2026-05-18T00:39:31.217015+00:00"}