{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Thomas Morgan", "hasEmail": "mailto:thomas.h.morgan@nasa.gov"}, "description": "Report of spectrograms of comet 1P/Halley taken by amateur astronomers and submitted as part of the International Halley Watch Amateur Network. No digital data are included in these files - only the observational parameters are recorded. The documented photographic plates have not been digitized or included in the archive directly.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.ihw-c-amsp-n-ndr-halley-v1.0_p84d-hw3d", "issued": "2018-06-26", "keyword": ["halley", "international-halley-watch"], "landingPage": "https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=IHW-C-AMSP-N-NDR-HALLEY-V1.0", "modified": "2025-07-17", "programCode": ["026:005"], "publisher": {"@type": "org:Organization", "name": "National Aeronautics and Space Administration"}, "references": ["https://pds.nasa.gov"], "theme": ["Earth Science"], "title": "IHW AMATEUR SPECTROGRAMS OF COMET 1P/HALLEY"}