Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W3046493003', 'doi': None, 'title': 'Ionospheric total electron content estimation for single-frequency global positioning system receivers', 'display_name': 'Ionospheric total electron content estimation for single-frequency global positioning system receivers', 'publication_year': 1987, 'publication_date': '1987-01-01', 'ids': {'openalex': 'https://openalex.org/W3046493003', 'mag': '3046493003'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://ui.adsabs.harvard.edu/abs/1987PhDT........48S/abstract', 'pdf_url': None, 'source': None, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': [], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5056111948', 'display_name': 'Carey A. Smith', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': True, 'raw_author_name': 'Carey A. Smith', 'raw_affiliation_strings': [], 'affiliations': []}], 'institution_assertions': [], 'countries_distinct_count': 0, 'institutions_distinct_count': 0, 'corresponding_author_ids': ['https://openalex.org/A5056111948'], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 0.0, 'has_fulltext': False, 'cited_by_count': 0, 'citation_normalized_percentile': {'value': 0.0, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 0, 'max': 53}, 'biblio': {'volume': None, 'issue': None, 'first_page': None, 'last_page': None}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10159', 'display_name': 'Space Weather and Magnetospheric Physics', 'score': 0.9942, 'subfield': {'id': 'https://openalex.org/subfields/3103', 'display_name': 'Astronomy and Astrophysics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10159', 'display_name': 'Space Weather and Magnetospheric Physics', 'score': 0.9942, 'subfield': {'id': 'https://openalex.org/subfields/3103', 'display_name': 'Astronomy and Astrophysics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T10655', 'display_name': 'Global Navigation Satellite Systems (GNSS)', 'score': 0.9893, '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/T12004', 'display_name': 'Optical Atomic Clock Technology', 'score': 0.9783, 'subfield': {'id': 'https://openalex.org/subfields/3107', 'display_name': 'Atomic and Molecular Physics, and Optics'}, 'field': {'id': 'https://openalex.org/fields/31', 'display_name': 'Physics and Astronomy'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/space-environment-modeling', 'display_name': 'Space Environment Modeling', 'score': 0.544378}, {'id': 'https://openalex.org/keywords/receiver-antennas', 'display_name': 'Receiver Antennas', 'score': 0.52822}, {'id': 'https://openalex.org/keywords/multi-gnss-experiment', 'display_name': 'Multi-GNSS Experiment', 'score': 0.528044}, {'id': 'https://openalex.org/keywords/precise-point-positioning', 'display_name': 'Precise Point Positioning', 'score': 0.516765}, {'id': 'https://openalex.org/keywords/electron-acceleration', 'display_name': 'Electron Acceleration', 'score': 0.512946}], 'concepts': [{'id': 'https://openalex.org/C116403925', 'wikidata': 'https://www.wikidata.org/wiki/Q162219', 'display_name': 'Ionosphere', 'level': 2, 'score': 0.77167785}, {'id': 'https://openalex.org/C165391973', 'wikidata': 'https://www.wikidata.org/wiki/Q844304', 'display_name': 'Total electron content', 'level': 4, 'score': 0.63909066}, {'id': 'https://openalex.org/C202511199', 'wikidata': 'https://www.wikidata.org/wiki/Q7239503', 'display_name': 'Precise Point Positioning', 'level': 4, 'score': 0.47079745}, {'id': 'https://openalex.org/C62649853', 'wikidata': 'https://www.wikidata.org/wiki/Q199687', 'display_name': 'Remote sensing', 'level': 1, 'score': 0.45531946}, {'id': 'https://openalex.org/C13280743', 'wikidata': 'https://www.wikidata.org/wiki/Q131089', 'display_name': 'Geodesy', 'level': 1, 'score': 0.43374535}, {'id': 'https://openalex.org/C17674307', 'wikidata': 'https://www.wikidata.org/wiki/Q6063767', 'display_name': 'Ionospheric absorption', 'level': 3, 'score': 0.41748485}, {'id': 'https://openalex.org/C60229501', 'wikidata': 'https://www.wikidata.org/wiki/Q18822', 'display_name': 'Global Positioning System', 'level': 2, 'score': 0.3508309}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.33796385}, {'id': 'https://openalex.org/C127313418', 'wikidata': 'https://www.wikidata.org/wiki/Q1069', 'display_name': 'Geology', 'level': 0, 'score': 0.27140915}, {'id': 'https://openalex.org/C8058405', 'wikidata': 'https://www.wikidata.org/wiki/Q46255', 'display_name': 'Geophysics', 'level': 1, 'score': 0.24564266}, {'id': 'https://openalex.org/C76155785', 'wikidata': 'https://www.wikidata.org/wiki/Q418', 'display_name': 'Telecommunications', 'level': 1, 'score': 0.22833037}, {'id': 'https://openalex.org/C176379880', 'wikidata': 'https://www.wikidata.org/wiki/Q18031939', 'display_name': 'TEC', 'level': 3, 'score': 0.18918014}, {'id': 'https://openalex.org/C14279187', 'wikidata': 'https://www.wikidata.org/wiki/Q5514012', 'display_name': 'GNSS applications', 'level': 3, 'score': 0.16456574}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://ui.adsabs.harvard.edu/abs/1987PhDT........48S/abstract', 'pdf_url': None, 'source': None, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'display_name': 'Affordable and clean energy', 'id': 'https://metadata.un.org/sdg/7', 'score': 0.56}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 0, 'referenced_works': [], 'related_works': ['https://openalex.org/W3203519984', 'https://openalex.org/W3193670095', 'https://openalex.org/W3192213750', 'https://openalex.org/W3178540115', 'https://openalex.org/W3130302948', 'https://openalex.org/W3116194706', 'https://openalex.org/W3098424001', 'https://openalex.org/W3096905621', 'https://openalex.org/W3091831210', 'https://openalex.org/W3046585261', 'https://openalex.org/W3036782330', 'https://openalex.org/W3030968197', 'https://openalex.org/W3010607989', 'https://openalex.org/W2997733939', 'https://openalex.org/W2996340357', 'https://openalex.org/W2991558851', 'https://openalex.org/W2990805546', 'https://openalex.org/W2122842507', 'https://openalex.org/W2031819061', 'https://openalex.org/W1600368639'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W3046493003', 'counts_by_year': [], 'updated_date': '2024-09-19T01:44:44.033682', 'created_date': '2020-08-07'}