{ "$schema": "/api/schemas/documents.schema.json", "apiVersion": "1.0.0", "generatedAt": "2026-06-17T23:49:39.838Z", "sourcePath": "src/main/data/docs", "docId": "10.5594-J09004", "document": { "abstract": "This report describes the design and construction of the National Bureau of Standards frequency-time broadcast station, WWV, located at Fort Collins, Colo. The principal function of the station, located 11.25 km (7 mi) north of Fort Collins, is to broadcast basic standards of frequency and time signals on frequencies of 2.5, 5, 10, 15, 20 and 25 MHz. These high-frequency transmissions, which can be received on the simplest of equipment, provide the necessary accuracy required to fill some of the needs of industry, Government and the public. The technical and administrative supervision of the station is under the Time and Frequency Division, Frequency-Time Broadcast Services Section, National Bureau of Standards, Boulder, CO 80302.", "abstract$meta": { "confidence": "high", "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_81_6/MIJR15Vol81No6.xml)", "source": "parsed", "updated": "2026-06-16T16:11:59.617Z", "version": "smpte-journal-issue-xml@v1" }, "articleType": "research-article", "articleType$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "authors": [ "Peter P. Viezbicke" ], "authors$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "copyright": { "holder": "Society of Motion Picture and Television Engineers, Inc.", "holder$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "year": "1972", "year$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "copyright$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docId": "10.5594-J09004", "docId$meta": { "confidence": "high", "note": "Derived from DOI 10.5594/J09004", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docLabel": "Journal of the SMPTE ( Volume: 81, Issue: 6, June 1972)", "docLabel$meta": { "confidence": "medium", "note": "Composed from journal title, volume, issue and date", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docTitle": "NBS Frequency-Time Broadcast Station WWV, Fort Collins, Colo", "docTitle$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docType": "Journal Article", "docType$meta": { "confidence": "high", "note": "NLM
— SMPTE journal paper", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "doi": "10.5594/J09004", "doi$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "href": "https://doi.org/10.5594/J09004", "href$meta": { "confidence": "high", "note": "Constructed from DOI 10.5594/J09004", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "issn": { "print": "0361-4573", "print$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "issn$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "journalAcronym": "MIJR", "journalAcronym$meta": { "confidence": "high", "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_81_6/MIJR15Vol81No6.xml)", "source": "parsed", "updated": "2026-06-16T16:11:59.617Z", "version": "smpte-journal-issue-xml@v1" }, "number": "6", "number$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "pages": "458–459", "pages$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publicationDate": "1972-06-01", "publicationDate$meta": { "confidence": "high", "note": "Day absent in NLM source — padded to 01", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publisher": "SMPTE", "publisher$meta": { "confidence": "high", "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publisherLocation": { "city": "White Plains, NY", "city$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "country": "USA", "country$meta": { "confidence": "high", "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/08182015 BACKFILE JOURNAL FRESH/smptej_81_6/MIJR15Vol81No6.xml)", "source": "parsed", "updated": "2026-06-16T16:11:59.617Z", "version": "smpte-journal-issue-xml@v1" } }, "publisherLocation$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "status": { "active": true, "active$meta": { "confidence": "medium", "note": "No explicit status in NLM source — journal articles default active", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "volume": "81", "volume$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J09004.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } } }