{"id":"https://openalex.org/A5111658046","orcid":null,"observed_orcids":[],"display_name":"Daniel N. Harpold","raw_author_names":["D. Harpold","D. N. Harpold","D.N. Harpold","Daniel Harpold","Daniel N. Harpold"],"full_name":"Daniel N. Harpold","works_count":34,"cited_by_count":7354,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":19,"i10_index":22},"ids":{"openalex":"https://openalex.org/A5111658046","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I1306266525","ror":"https://ror.org/0171mag52","display_name":"Goddard Space Flight Center","country_code":"US","type":"facility","lineage":["https://openalex.org/I1306266525","https://openalex.org/I4210124779"]},"years":[2015,2014,2012,2007,1998,1996]},{"institution":{"id":"https://openalex.org/I4210124779","ror":"https://ror.org/027ka1x80","display_name":"National Aeronautics and Space Administration","country_code":"US","type":"government","lineage":["https://openalex.org/I4210124779"]},"years":[2013]},{"institution":{"id":"https://openalex.org/I4210149382","ror":"https://ror.org/04xx4z452","display_name":"Johnson Space Center","country_code":"US","type":"facility","lineage":["https://openalex.org/I4210124779","https://openalex.org/I4210149382"]},"years":[2013]}],"last_known_institutions":[{"id":"https://openalex.org/I1306266525","ror":"https://ror.org/0171mag52","display_name":"Goddard Space Flight Center","country_code":"US","type":"facility","lineage":["https://openalex.org/I1306266525","https://openalex.org/I4210124779"]}],"topics":[{"id":"https://openalex.org/T10406","display_name":"Planetary Science and Exploration","count":31,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10325","display_name":"Astro and Planetary Science","count":30,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11740","display_name":"Geochemistry and Elemental Analysis","count":8,"subfield":{"id":"https://openalex.org/subfields/1906","display_name":"Geochemistry and Petrology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10683","display_name":"Mass Spectrometry Techniques and Applications","count":7,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12449","display_name":"Spacecraft Design and Technology","count":4,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10406","display_name":"Planetary Science and Exploration","value":8.84e-05,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10325","display_name":"Astro and Planetary Science","value":4.92e-05,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10683","display_name":"Mass Spectrometry Techniques and Applications","value":2.49e-05,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12449","display_name":"Spacecraft Design and Technology","value":1.51e-05,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11740","display_name":"Geochemistry and Elemental Analysis","value":1.5e-05,"subfield":{"id":"https://openalex.org/subfields/1906","display_name":"Geochemistry and Petrology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"83260615","wikidata":"https://www.wikidata.org/wiki/Q6773121","display_name":"Mars Exploration Program","score":0.9433482885360718},{"id":"87355193","wikidata":"https://www.wikidata.org/wiki/Q411","display_name":"Astrobiology","score":0.9129523038864136},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.8691426515579224},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.5470746755599976},{"id":"39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","score":0.5461784601211548}],"counts_by_year":[{"year":1996,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1999,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":2,"oa_works_count":1,"cited_by_count":31},{"year":2013,"works_count":13,"oa_works_count":8,"cited_by_count":154},{"year":2014,"works_count":3,"oa_works_count":3,"cited_by_count":531},{"year":2015,"works_count":2,"oa_works_count":1,"cited_by_count":582},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":681},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":606},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":650},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":493},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":569},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":558},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":544},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":393},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":471},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":479},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":395}],"display_name_alternatives":["D. Harpold","D. N. Harpold","D.N. Harpold","Daniel Harpold","Daniel N. Harpold"],"block_key":"d harpold","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111658046","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5111658046","updated_date":"2026-11-10T14:30:39","created_date":"2016-06-24T00:00:00"}