دورية أكاديمية
Removing day-boundary discontinuities on GNSS clock estimates: methodology and results
| العنوان: | Removing day-boundary discontinuities on GNSS clock estimates: methodology and results |
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| المؤلفون: | Rovira Garcia, Adrià, Juan Zornoza, José Miguel, Sanz Subirana, Jaume, González Casado, Guillermo, Ventura Traveset, Javier, Cacciapuoti, Luigi, Schoenemann, Erik |
| المساهمون: | Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Departament de Matemàtiques, Universitat Politècnica de Catalunya. gAGE - Grup d'Astronomia i Geomàtica |
| سنة النشر: | 2021 |
| المجموعة: | Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
| مصطلحات موضوعية: | Àrees temàtiques de la UPC::Física, Global Positioning System, Artificial satellites in navigation, Clocks and watches, Global navigation satellite systems (GNSS), Integer ambiguity resolution (IAR), International GNSS service (IGS), Clock stability, Sistema de posicionament global, Satèl·lits artificials en navegació, Rellotges |
| الوصف: | Global navigation satellite system (GNSS) satellites are equipped with very stable atomic clocks that can be used for assess-ing the models and strategies involved in the estimation processes, where the clock estimates should present high stability. For instance, GNSS products (including satellite and receiver clocks) are computed on daily basis, i.e., with the data of each day being processed independently from other days. This choice produces the well-known day-boundary discontinuities (DBDs) on clock estimates that stem from the estimation process, rather than to the nature of the atomic clock itself. The aim of the present contribution is to propose a strategy to estimate the satellite and receiver clock offsets that is capable to reduce the DBDs observed in the products of different analysis centers (ACs) within the International GNSS Service (IGS), ultimately improving the accuracy of clock estimates. Our approach relies on the use of unambiguous, undifferenced and uncombined carrier phase measurements collected by a network of permanent receivers on ground. The strategy consid-ers the carrier phase hardware delays and assumes their possible variations along time. Our daily data processing aims to maintaining the natural continuity over days of the carrier phase measurements after integer ambiguity resolution (IAR), even if IAR is performed on daily batches. We compare our clock estimations with those computed by different IGS ACs, evaluating the linear behavior of the satellite atomic clocks on the day change. The results show the removal of DBD on clock estimates computed with the continuous and unambiguous carrier phase measurements. This DBD improvement may benefit the statistical characterization of long-term phenomena correlated with the on-board clocks. ; The present work was supported in part by the European Space Agency contract (REL-GAL) N.4000122402/17/NL/IB, by the Spanish Ministry of Science, Innovation and Universities project RTI2018-094295-B-I00 and by the Horizon 2020 Marie ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1080-5370 |
| العلاقة: | https://link.springer.com/article/10.1007/s10291-021-01085-3Test; info:eu-repo/grantAgreement/EC/H2020/797461/EU/High Accuracy Navigation under Scintillation Conditions/NAVSCIN; info:eu-repo/grantAgreement/MICINN/2PE/ RTI2018-094295-B-I00; Rovira-Garcia, A. [et al.]. Removing day-boundary discontinuities on GNSS clock estimates: methodology and results. "Gps solutions", Abril 2021, vol. 25, núm. 2, p. 35/1-35/12.; http://hdl.handle.net/2117/335589Test |
| DOI: | 10.1007/s10291-021-01085-3 |
| الإتاحة: | https://doi.org/10.1007/s10291-021-01085-3Test http://hdl.handle.net/2117/335589Test |
| حقوق: | Attribution 4.0 ; http://creativecommons.org/licenses/by/4.0Test/ ; Open Access |
| رقم الانضمام: | edsbas.13668BEB |
| قاعدة البيانات: | BASE |
| تدمد: | 10805370 |
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| DOI: | 10.1007/s10291-021-01085-3 |