{"id":"https://openalex.org/W2156953173","doi":"https://doi.org/10.1109/cca.2011.6044356","title":"Miniaturizing the spherical sundial: A hemispherical sensor for orientation and positioning with respect to point sources of light","display_name":"Miniaturizing the spherical sundial: A hemispherical sensor for orientation and positioning with respect to point sources of light","publication_year":2011,"publication_date":"2011-09-01","ids":{"openalex":"https://openalex.org/W2156953173","doi":"https://doi.org/10.1109/cca.2011.6044356","mag":"2156953173"},"language":"en","primary_location":{"id":"doi:10.1109/cca.2011.6044356","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cca.2011.6044356","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 IEEE International Conference on Control Applications (CCA)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5039102883","display_name":"John Barnes","orcid":"https://orcid.org/0000-0002-4953-210X"},"institutions":[{"id":"https://openalex.org/I219193219","display_name":"Purdue University West Lafayette","ror":"https://ror.org/02dqehb95","country_code":"US","type":"education","lineage":["https://openalex.org/I219193219"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"John Barnes","raw_affiliation_strings":["Department of Mechanical Engineering, Purdue University, West Lafayette, IN, USA"],"affiliations":[{"raw_affiliation_string":"Department of Mechanical Engineering, Purdue University, West Lafayette, IN, USA","institution_ids":["https://openalex.org/I219193219"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5009025121","display_name":"Kartik B. Ariyur","orcid":null},"institutions":[{"id":"https://openalex.org/I219193219","display_name":"Purdue University West Lafayette","ror":"https://ror.org/02dqehb95","country_code":"US","type":"education","lineage":["https://openalex.org/I219193219"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kartik B. Ariyur","raw_affiliation_strings":["Department of Mechanical Engineering, Purdue University, West Lafayette, IN, USA"],"affiliations":[{"raw_affiliation_string":"Department of Mechanical Engineering, Purdue University, West Lafayette, IN, USA","institution_ids":["https://openalex.org/I219193219"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5039102883"],"corresponding_institution_ids":["https://openalex.org/I219193219"],"apc_list":null,"apc_paid":null,"fwci":1.7118,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.87556393,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"9","issue":null,"first_page":"662","last_page":"667"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11325","display_name":"Inertial Sensor and Navigation","score":0.9965000152587891,"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"}},"topics":[{"id":"https://openalex.org/T11325","display_name":"Inertial Sensor and Navigation","score":0.9965000152587891,"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/T11963","display_name":"Impact of Light on Environment and Health","score":0.9882000088691711,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10851","display_name":"Optical Wireless Communication Technologies","score":0.9864000082015991,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/position","display_name":"Position (finance)","score":0.6584179401397705},{"id":"https://openalex.org/keywords/pixel","display_name":"Pixel","score":0.6014794707298279},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.601088285446167},{"id":"https://openalex.org/keywords/point","display_name":"Point (geometry)","score":0.5819085240364075},{"id":"https://openalex.org/keywords/orientation","display_name":"Orientation (vector space)","score":0.5455465316772461},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.541670024394989},{"id":"https://openalex.org/keywords/direction-vector","display_name":"Direction vector","score":0.5073296427726746},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.4409276247024536},{"id":"https://openalex.org/keywords/normal","display_name":"Normal","score":0.4332219064235687},{"id":"https://openalex.org/keywords/euclidean-vector","display_name":"Euclidean vector","score":0.4153825640678406},{"id":"https://openalex.org/keywords/image-sensor","display_name":"Image sensor","score":0.41110026836395264},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.3357446491718292},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.32765719294548035},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2701040506362915},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.23769065737724304},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.20643001794815063},{"id":"https://openalex.org/keywords/surface","display_name":"Surface (topology)","score":0.2063673436641693}],"concepts":[{"id":"https://openalex.org/C198082294","wikidata":"https://www.wikidata.org/wiki/Q3399648","display_name":"Position (finance)","level":2,"score":0.6584179401397705},{"id":"https://openalex.org/C160633673","wikidata":"https://www.wikidata.org/wiki/Q355198","display_name":"Pixel","level":2,"score":0.6014794707298279},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.601088285446167},{"id":"https://openalex.org/C28719098","wikidata":"https://www.wikidata.org/wiki/Q44946","display_name":"Point (geometry)","level":2,"score":0.5819085240364075},{"id":"https://openalex.org/C16345878","wikidata":"https://www.wikidata.org/wiki/Q107472979","display_name":"Orientation (vector space)","level":2,"score":0.5455465316772461},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.541670024394989},{"id":"https://openalex.org/C137318105","wikidata":"https://www.wikidata.org/wiki/Q36255","display_name":"Direction vector","level":2,"score":0.5073296427726746},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.4409276247024536},{"id":"https://openalex.org/C118732077","wikidata":"https://www.wikidata.org/wiki/Q273176","display_name":"Normal","level":3,"score":0.4332219064235687},{"id":"https://openalex.org/C118965365","wikidata":"https://www.wikidata.org/wiki/Q44528","display_name":"Euclidean vector","level":2,"score":0.4153825640678406},{"id":"https://openalex.org/C76935873","wikidata":"https://www.wikidata.org/wiki/Q209121","display_name":"Image sensor","level":2,"score":0.41110026836395264},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.3357446491718292},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.32765719294548035},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2701040506362915},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.23769065737724304},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.20643001794815063},{"id":"https://openalex.org/C2776799497","wikidata":"https://www.wikidata.org/wiki/Q484298","display_name":"Surface (topology)","level":2,"score":0.2063673436641693},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/cca.2011.6044356","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cca.2011.6044356","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 IEEE International Conference on Control Applications (CCA)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Life below water","id":"https://metadata.un.org/sdg/14","score":0.41999998688697815}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":11,"referenced_works":["https://openalex.org/W751044809","https://openalex.org/W1901159978","https://openalex.org/W2001695663","https://openalex.org/W2010870664","https://openalex.org/W2016374147","https://openalex.org/W2019358482","https://openalex.org/W2046914842","https://openalex.org/W2102712320","https://openalex.org/W2124117776","https://openalex.org/W2157426451","https://openalex.org/W2169687862"],"related_works":["https://openalex.org/W2944239605","https://openalex.org/W1873415836","https://openalex.org/W4200290804","https://openalex.org/W2139783875","https://openalex.org/W4312469487","https://openalex.org/W94582005","https://openalex.org/W2137812155","https://openalex.org/W2213895515","https://openalex.org/W2051672615","https://openalex.org/W3027805006"],"abstract_inverted_index":{"We":[0,25],"propose":[1],"a":[2,8,44,50],"novel":[3],"solar":[4],"sensor":[5,74,117],"geometry":[6],"utilizing":[7],"hemispherical":[9],"arrangement":[10],"of":[11,71,104,115],"pixels":[12],"to":[13,17,54,111],"determine":[14,112],"the":[15,18,37,56,60,68,102,105,113,116,119],"vector":[16,89],"dominant":[19],"light":[20],"source":[21],"in":[22],"its":[23],"environment.":[24,100],"show":[26],"two":[27],"methods":[28,63,77,83],"for":[29,59,84,127],"calculating":[30],"this":[31],"vector:":[32],"one":[33,42],"based":[34],"on":[35,67,118],"transforming":[36],"problem":[38],"from":[39],"an":[40,86,98],"optical":[41],"into":[43],"geometric":[45],"one,":[46],"and":[47,125,130],"another":[48],"using":[49],"least":[51],"squares":[52],"approach":[53],"minimize":[55],"error":[57],"function":[58],"sensor.":[61],"These":[62],"do":[64,93],"not":[65,94],"depend":[66],"physical":[69],"details":[70],"any":[72],"particular":[73],"design.":[75],"Both":[76],"rely":[78,95],"upon":[79,96],"certain":[80],"assumptions,":[81],"but":[82],"extracting":[85],"accurate":[87],"sun":[88,106],"are":[90],"discussed":[91],"which":[92],"such":[97],"idealized":[99],"Using":[101],"estimate":[103],"vector,":[107],"it":[108],"is":[109],"possible":[110],"location":[114],"Earth.":[120],"Applications":[121],"include":[122],"position":[123],"measurement":[124],"navigation":[126],"UAVs,":[128],"UGVs,":[129],"other":[131],"mobile":[132],"platforms.":[133]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}