{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T12:20:55Z","timestamp":1767183655825,"version":"3.37.3"},"reference-count":27,"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","license":[{"start":{"date-parts":[[2019,1,1]],"date-time":"2019-01-01T00:00:00Z","timestamp":1546300800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/ieeexplore.ieee.org\/Xplorehelp\/downloads\/license-information\/OAPA.html"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE Access"],"published-print":{"date-parts":[[2019]]},"DOI":"10.1109\/access.2019.2906413","type":"journal-article","created":{"date-parts":[[2019,3,20]],"date-time":"2019-03-20T19:00:28Z","timestamp":1553108428000},"page":"38618-38629","source":"Crossref","is-referenced-by-count":6,"title":["The Feasible Combining Observation Models and Equivalence in Dual-Frequency Precise Point Positioning"],"prefix":"10.1109","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1852-4414","authenticated-orcid":false,"given":"Peng","family":"Liu","sequence":"first","affiliation":[]},{"given":"Honglei","family":"Qin","sequence":"additional","affiliation":[]},{"given":"Li","family":"Cong","sequence":"additional","affiliation":[]}],"member":"263","reference":[{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-002-0009-3"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-662-50367-6_10"},{"key":"ref12","first-page":"734","article-title":"Comparison of ionosphere-free, UofC and uncombined PPP observation models","volume":"44","author":"li","year":"2015","journal-title":"Acta Geodaetic Cartograph Sinica"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-006-0020-1"},{"article-title":"Improving ambiguity convergence in carrier phase-based precise point positioning","year":"2002","author":"shen","key":"ref14"},{"key":"ref15","first-page":"561","article-title":"Mathematic model and performance comparison between ionosphere-free combined and uncombined precise point positioning","volume":"38","author":"zhang","year":"2013","journal-title":"Geomatics Inf Sci Wuhan Univ"},{"key":"ref16","article-title":"Kalman filtering and its real-time applications","author":"chui","year":"2017","journal-title":"Real-Time Systems"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1007\/s00190-007-0157-x"},{"key":"ref18","first-page":"69","author":"guo","year":"2016","journal-title":"Theory and Methodology of Quality Control and Quality Analysis for GPS Precise Point Positioning"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.3390\/s17030602"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-007-0070-z"},{"key":"ref27","first-page":"250","article-title":"Precise post-processing of GPS data: Products and services from JPL","author":"zumberge","year":"2001","journal-title":"Proc ION NTM"},{"key":"ref3","first-page":"262","article-title":"Generating classes of equivalent linear models by nuisance parameter elimination: Applications to GPS observations","volume":"11","author":"schaffrin","year":"1986","journal-title":"Manuscripta Geodaetica"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-7091-6199-9"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-72011-6"},{"key":"ref8","first-page":"22","article-title":"What does &#x2018;geometry-based&#x2019; and &#x2018;geometry-free&#x2019; mean in the context of GNSS","volume":"3","author":"odijk","year":"2008","journal-title":"Inside GNSS&#x2013;GNSS Solutions Column"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1002\/9781119018612"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1007\/PL00012883"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1002\/j.2161-4296.2002.tb00260.x"},{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1029\/96JB03860"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1179\/003962609X390139"},{"key":"ref22","first-page":"1423","article-title":"Evaluation of precise, kinematic GPS point positioning","author":"colombo","year":"2004","journal-title":"Proc ION GNSS 18th Int Tech Meeting Satellite Division"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1007\/s10291-016-0545-x"},{"article-title":"A guide to using international GNSS service (IGS) products","year":"2009","author":"kouba","key":"ref24"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1016\/S1464-1895(01)00103-X"},{"article-title":"Elements of GPS precise point positioning","year":"2000","author":"witchayangkoon","key":"ref26"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1515\/jag-2014-0008"}],"container-title":["IEEE Access"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx7\/6287639\/8600701\/08672054.pdf?arnumber=8672054","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,8,10]],"date-time":"2021-08-10T19:40:39Z","timestamp":1628624439000},"score":1,"resource":{"primary":{"URL":"https:\/\/ieeexplore.ieee.org\/document\/8672054\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019]]},"references-count":27,"URL":"https:\/\/doi.org\/10.1109\/access.2019.2906413","relation":{},"ISSN":["2169-3536"],"issn-type":[{"type":"electronic","value":"2169-3536"}],"subject":[],"published":{"date-parts":[[2019]]}}}