[Anquela, A. Martín, A. Berné, L. Padín, J. (2013). “GPS and GLONASS Static and Kinematic PPP Results.” Journal of Surveying Engineering 139 (1), 47–58. https://doi.org/10.1061/(ASCE)SU.1943-5428.000009110.1061/(ASCE)SU.1943-5428.0000091]Search in Google Scholar
[Boehm, J. Niell, A. Tregoning, P. Schuh, H. (2006). “Global Mapping Function (GMF): A new empirical mapping function based on numerical weather model data.” Geophysical Research Letter. 33, 3–6. https://doi.org/10.1029/2005GL02554610.1029/2005GL025546]Search in Google Scholar
[Cai, C. Gao, Y. (2013). “Modelling and assessment of combined GPS / GLONASS precise point positioning.” GPS Solution. 17 (2), 223–236.10.1007/s10291-012-0273-9]Search in Google Scholar
[Cai, C. Gao, Y. Pan, L. Zhu, J. (2015). “Precise point positioning with quad-constellations: GPS, BeiDou, GLONASS and Galileo.” Advances in Space Research. 56, 133–143. https://doi.org/10.1016/j.asr.2015.04.00110.1016/j.asr.2015.04.001]Search in Google Scholar
[Choy, S. Zhang, S. Lahaye, F. Héroux, P. (2013). “A comparison between GPS-only and combined GPS+GLONASS Precise Point Positioning.” Journal of Spatial Sciences. 58 (2),169–190. https://doi.org/10.1080/14498596.2013.80816410.1080/14498596.2013.808164]Search in Google Scholar
[Dach, R. Brockmann, E. Schaer, S. Beutler, G. Meindl, M. Prange, L. Bock, H. Jäggi, A. Ostini, L. (2009). “GNSS processing at CODE: Status report.” Journal of Geodesy. 83, 353–365. https://doi.org/10.1007/s00190-008-0281-210.1007/s00190-008-0281-2]Search in Google Scholar
[Dawidowicz, K. Krzan, G. (2014). “Coordinate estimation accuracy of static precise point positioning using on-line PPP service, a case study.” Acta Geodaetica et Geophysica. 49, 37–55. https://doi.org/10.1007/s40328-013-0038-010.1007/s40328-013-0038-0]Search in Google Scholar
[Dong, Z. Jin, S. (2018). “3-D water vapor tomography in Wuhan from GPS, BDS and GLONASS observations.” Remote Sensing. 10, 1–15. https://doi.org/10.3390/rs1001006210.3390/rs10010062]Search in Google Scholar
[Farah, A. (2018). “Kinematic-PPP using Single/Dual Frequency Observations from (GPS, GLONASS and GPS/GLONASS) Constellations for Hydrography.” Artificial Satellites 53(1): 37-46.10.2478/arsa-2018-0004]Search in Google Scholar
[Geng, J. Meng, X. Dodson, A.H. Teferle, F.N. (2010). “Integer ambiguity resolution in precise point positioning: Method comparison.” Journal of Geodesy. 84, 569–581. https://doi.org/10.1007/s00190-010-0399-x10.1007/s00190-010-0399-x]Search in Google Scholar
[GIPSY-OASIS. (2019). Website for GIPSY-OASIS features. Available at: https://gipsy-oasis.jpl.nasa.gov/gipsy/index.php [Accessed July 2019].]Search in Google Scholar
[Guo, F. Li, X. Zhang, X. Wang, J. (2017). “The contribution of Multi-GNSS Experiment (MGEX) to precise point positioning.” Advances in Space Research. 59, 2714–2725. https://doi.org/10.1016/j.asr.2016.05.01810.1016/j.asr.2016.05.018]Search in Google Scholar
[Guo, Q. (2015). “Precision comparison and analysis of four online free PPP services in static positioning and tropospheric delay estimation.” GPS Solution. 19 (4), 537–544. https://doi.org/10.1007/s10291-014-0413-510.1007/s10291-014-0413-5]Search in Google Scholar
[Hamed, M. Abdullah, A. Farah, A. (2019). “Kinematic PPP Using Mixed GPS/GLONASS Single-Frequency Observations.” Artificial Satellites 54(3): 97-112.10.2478/arsa-2019-0008]Search in Google Scholar
[Hernandez, M. Juan, J. Sanz, J. Ramos, P. Garcia, A., Salazar, D., Ventura, J. Lopez, C. (2010), The ESA/UPC GNSS-lab tool (gLAB). In Proc. of the 5th ESA Workshop on Satellite Navigation Technologies (NAVITEC’ 2010), ESTEC, Noordwijk, The Netherlands]Search in Google Scholar
[Herring, A. King, W. Floyd, A. McClusky, C. (2015). Introduction to GAMIT/GLOBK, Release 10.6 1–50. Available at: http://www-gpsg.mit.edu/~simon/gtgk/Intro_GG.pdf]Search in Google Scholar
[Kouba, J. Héroux, P. (2001). “Precise Point Positioning Using IGS Orbit and Clock Products.” GPS Solution. 5 (2), 12–28. https://doi.org/10.1007/PL0001288310.1007/PL00012883]Search in Google Scholar
[Krasuski, K., Cwiklak, J. Jafernik, H. (2018), “Aircraft positioning using PPP method in GLONASS system”, Aircraft Engineering and Aerospace Technology, Vol. 90 No. 9, pp. 1413-1420. https://doi.org/10.1108/AEAT-06-2017-0147.10.1108/AEAT-06-2017-0147]Search in Google Scholar
[Krasuski, K., Wierzbicki, D. Jafernik, H. (2018), “Utilization PPP method in aircraft positioning in post-processing mode”, Aircraft Engineering and Aerospace Technology, Vol. 90 No. 1, pp. 202-209. https://doi.org/10.1108/AEAT-05-2016-007810.1108/AEAT-05-2016-0078]Search in Google Scholar
[Lagler, K. Schindelegger, M. Böhm, J. Krásná, H. Nilsson, T. (2013). “GPT2: Empirical slant delay model for radio space geodetic techniques.” Geophysical Research Letter. 40, 1069–1073. https://doi.org/10.1002/grl.5028810.1002/grl.50288437315025821263]Search in Google Scholar
[Lou, Y. Zheng, F. Gu, S. Wang, C. Guo, H. Feng, Y. (2016). “Multi-GNSS precise point positioning with raw single-frequency and dual-frequency measurement models.” GPS Solution. 20 (4), 849–862. https://doi.org/10.1007/s10291-015-0495-810.1007/s10291-015-0495-8]Search in Google Scholar
[Montenbruck, O. Steigenberger, P. Prange, L. Deng, Z. Zhao, Q. Perosanz, F. Romero, I. Noll, C. Stürze, A. Weber, G. Schmid, R. MacLeod, K. Schaer, S. (2017). “The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) – Achievements, prospects and challenges.” Advances in Space Research. 59, 1671–1697. https://doi.org/10.1016/j.asr.2017.01.01110.1016/j.asr.2017.01.011]Search in Google Scholar
[Ocalan, T. Erdogan, B. Tunalioglu, N. (2013). “Analysis of Web-Based Online Services for Gps Relative and Precise Point Positioning.” Bol. Cienc. Geod., sec. Artig. Curitiba. 19, 191–207.]Search in Google Scholar
[Pan, L. Zhang, X. Li, X. Li, Xin, Lu, C. Liu, J. Wang, Q. (2019). “Satellite availability and point positioning accuracy evaluation on a global scale for integration of GPS, GLONASS, BeiDou and Galileo.” Advances in Space Research. 63, 2696–2710. https://doi.org/10.1016/j.asr.2017.07.02910.1016/j.asr.2017.07.029]Search in Google Scholar
[Pan, Z. Chai, H. Kong, Y. (2017). “Integrating multi-GNSS to improve the performance of precise point positioning.” Advances in Space Research. 60, 2596–2606. https://doi.org/10.1016/j.asr.2017.01.01410.1016/j.asr.2017.01.014]Search in Google Scholar
[Saastamoinen, J. (1972). “Contributions to the theory of atmospheric refraction.” Bull. Géodésique. 46, 279–298. https://doi.org/10.1007/BF0252184410.1007/BF02521844]Search in Google Scholar
[Salazar, D. Hernandez, M. Juan, J. Sanz, J. (2010). “GNSS data management and processing with the GPSTk.” GPS Solution. 14 (3), 293–299. https://doi.org/10.1007/s10291-009-0149-910.1007/s10291-009-0149-9]Search in Google Scholar
[Wanninger, L. (2012). “Carrier-phase inter-frequency biases of GLONASS receivers.” Journal of Geodesy. 86, 139–148. https://doi.org/10.1007/s00190-011-0502-y10.1007/s00190-011-0502-y]Search in Google Scholar
[Yigit, O. Gikas, V. Alcay, S. Ceylan, A. (2014). “Performance evaluation of short to long term GPS, GLONASS and GPS/GLONASS postprocessed PPP.” Survey Review 46 (336), 155–166. https://doi.org/10.1179/1752270613Y.000000006810.1179/1752270613Y.0000000068]Search in Google Scholar
[Zhou, F. Dong, D. Li, W. Jiang, X. Wickert, J. Schuh, H. (2018). “GAMP: An open-source software of multi-GNSS precise point positioning using undifferenced and uncombined observations.” GPS Solution. 22 (2), 1–10. https://doi.org/10.1007/s10291-018-0699-910.1007/s10291-018-0699-9]Search in Google Scholar