{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T08:18:43Z","timestamp":1774340323517,"version":"3.50.1"},"reference-count":33,"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","license":[{"start":{"date-parts":[[2020,1,1]],"date-time":"2020-01-01T00:00:00Z","timestamp":1577836800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/legalcode"}],"funder":[{"DOI":"10.13039\/501100012309","name":"The Royal Golden Jubilee (RGJ) Ph.D. Programme","doi-asserted-by":"publisher","award":["PHD\/0166\/2561"],"award-info":[{"award-number":["PHD\/0166\/2561"]}],"id":[{"id":"10.13039\/501100012309","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007120","name":"King Mongkut\u2019s Institute of Technology Ladkrabang","doi-asserted-by":"publisher","award":["KREF116301"],"award-info":[{"award-number":["KREF116301"]}],"id":[{"id":"10.13039\/501100007120","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Program Management Unit-Brain Power, Manpower (PMU-B) through the Office of National Higher Education Science Research and Innovation Policy Council","award":["B16F630086"],"award-info":[{"award-number":["B16F630086"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE Access"],"published-print":{"date-parts":[[2020]]},"DOI":"10.1109\/access.2020.3035247","type":"journal-article","created":{"date-parts":[[2020,11,2]],"date-time":"2020-11-02T21:13:24Z","timestamp":1604351604000},"page":"201516-201526","source":"Crossref","is-referenced-by-count":10,"title":["Single-Frequency Time-Step Ionospheric Delay Gradient Estimation at Low-Latitude Stations"],"prefix":"10.1109","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4450-6890","authenticated-orcid":false,"given":"Jirapoom","family":"Budtho","sequence":"first","affiliation":[]},{"given":"Pornchai","family":"Supnithi","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4645-6033","authenticated-orcid":false,"given":"Susumu","family":"Saito","sequence":"additional","affiliation":[]}],"member":"263","reference":[{"key":"ref33","first-page":"1","article-title":"Evaluation of high sensitivity GPS receivers","author":"zhang","year":"2010","journal-title":"Proc Int Symp GPS\/GNSS"},{"key":"ref32","doi-asserted-by":"publisher","DOI":"10.1007\/lrsp-2015-4"},{"key":"ref31","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-015-0492-y"},{"key":"ref30","doi-asserted-by":"publisher","DOI":"10.1515\/rgg-2016-0025"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2018.2876795"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-017-0662-1"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1002\/navi.203"},{"key":"ref13","first-page":"269","article-title":"Determination of ionosphere gradient in short baselines by using single frequency measurements","volume":"42","author":"fujita","year":"2010","journal-title":"Journal of Aeronautics Astronautics and Aviation"},{"key":"ref14","first-page":"1445","article-title":"Precise measurements of ionospheric delay gradient at short baselines associated with low latitude ionospheric disturbances","author":"saito","year":"2012","journal-title":"Proc Int Tech Meeting Inst Navigat"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1109\/IEECON.2017.8075859"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.2514\/1.28199"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1002\/2015RS005738"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.3390\/s19092127"},{"key":"ref19","first-page":"28","article-title":"Using WAAS ionospheric data to estimate LAAS short baseline gradients","author":"datta-barua","year":"2002","journal-title":"Proc Nat Tech Meeting Inst Navigat"},{"key":"ref28","author":"korn","year":"2000","journal-title":"Mathematical Handbook for Scientists and Engineers Definitions Theorems and Formulas for Reference and Review"},{"key":"ref4","year":"2013","journal-title":"Mops for Global Navigation Satellite Ground Based Augmentation System Ground Equipment to Support Category I Operations"},{"key":"ref27","author":"stern","year":"2014","journal-title":"Satellite Altimetry and Earth Sciences"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1109\/PLANS.2018.8373503"},{"key":"ref6","first-page":"1","article-title":"Characterization and modelling of the ionosphere for EGNOS development and qualification","author":"schl\u00fcter","year":"2013","journal-title":"Proc ENC"},{"key":"ref29","first-page":"59","article-title":"Online precise point positioning: A new, timely service from natural resources Canada","volume":"19","author":"mireault","year":"2008","journal-title":"GPS World"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.2514\/1.C031309"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.3390\/s17102313"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1109\/ICCMC.2017.8282603"},{"key":"ref2","author":"scott","year":"2009","journal-title":"GNSS Applications and Methods"},{"key":"ref9","first-page":"1500","article-title":"Preliminary results from ionospheric threat model development to support GBAS operations in the Brazilian region","volume":"2","author":"lee","year":"2015","journal-title":"Proc 8th Int Tech Meeting Satell Division Inst Navig"},{"key":"ref1","year":"2018","journal-title":"Adoption of Amendment 91 to Annex 10 Volume II"},{"key":"ref20","first-page":"506","article-title":"Assessment of nominal ionosphere spatial decorrelation for LAAS","author":"lee","year":"2006","journal-title":"Proc IEEE\/ION Position Location Navigat Symp"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1002\/navi.3"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1029\/2018RS006606"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1029\/2012RS005016"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1109\/ITC-CSCC.2019.8793460"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1029\/2002JD002214"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1007\/BF00863419"}],"container-title":["IEEE Access"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx7\/6287639\/8948470\/09246505.pdf?arnumber=9246505","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,12,17]],"date-time":"2021-12-17T19:54:45Z","timestamp":1639770885000},"score":1,"resource":{"primary":{"URL":"https:\/\/ieeexplore.ieee.org\/document\/9246505\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020]]},"references-count":33,"URL":"https:\/\/doi.org\/10.1109\/access.2020.3035247","relation":{},"ISSN":["2169-3536"],"issn-type":[{"value":"2169-3536","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020]]}}}