Abstract
Here we propose a method for extracting line-of-sight ionospheric observables from GPS data using precise point positioning (PPP). The PPP-derived ionospheric observables (PIOs) have identical form with their counterparts obtained from leveling the geometry-free GPS carrier-phase to code (leveling ionospheric observables, LIOs), and are affected by the satellite and receiver inter-frequency biases (IFBs). Based on the co-location experiments, the effects of extracting error arising from the observational noise and multipath on the PIOs and the LIOs are comparatively assessed, and the considerably reduced effects ranging from 70% to 75% on the PIOs with respect to the LIOs can be verified in our case. In addition, based on 26 consecutive days’ GPS observations from two international GNSS service (IGS) sites (COCO, DAEJ) during disturbed ionosphere period, the extracted PIOs and LIOs are respectively used as the input of single-layer ionospheric model to retrieve daily satellite IFBs station-by-station. The minor extracting errors underlying the PIOs in contrast to the LIOs can also be proven by reducing day-to-day scatter and improving between-receiver consistency in the retrieved satellite IFBs values.
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References
Yang Y X, Zeng A M. Adaptive filtering for deformation parameter estimation in consideration of geometrical measurements and geophysical models. Sci China Ser D-Earth Sci, 2009, 52: 1216–1222
Yang Y X, Zeng A M, Wu F M. Horizontal crustal movement in China fitted by adaptive collocation with embedded Euler vector. Sci China Earth Sci, 2011, 54: 1822–1829
Feng Y M, Li B F. Wide area real time kinematic decimetre positioning with multiple carrier GNSS signals. Sci China Earth Sci, 2010, 53: 731–740
Yang Y X, Li J L, Xu J Y, et al. Contribution of the Compass satellite navigation system to global PNT users. Chin Sci Bull, 2011, 56: 2813–2819
Hernández-Pajares M, Juan J M, Sanz J. New approaches in global ionospheric determination using ground GPS data. J Atmos Solar Terr Phys, 1999, 61: 1237–1247
Mannucci A J, Wilson B D, Yuan D N, et al. A global mapping technique for GPS derived ionospheric total electron content measurements. Radio Sci, 1998, 33: 565–582
Brunini C, Azpilicueta F. Accuracy assessment of the GPS-based slant total electron content. J Geod, 2009, 83: 773–785
Brunini C, Azpilicueta F. GPS slant total electron content accuracy using the single layer model under different geomagnetic regions and ionospheric conditions. J Geod, 2010, 84: 293–304
Komjathy A, Sparks L, Wilson B D, et al. Automated daily processing of more than 1000 ground-based GPS receivers for studying intense ionospheric storms, Radio Sci, 2005, 40: RS6006
Wilson B D, Mannucci A J. Extracting ionospheric measurements from GPS in the presence of Anti-Spoofing. Proceedings of ION GPS, Salt Lake City, Utah, USA. 1994. 1599–1608
Burrell A G, Bonito N A, Carrano C S. Total electron content processing from GPS observations to facilitate ionospheric modeling. GPS Solut, 2006, 13: 83–95
Rideout W, Coster A. Automated GPS processing for global total electron content data. GPS Solut, 2006, 10: 219–228
Ciraolo L, Azpilicueta F, Brunini C, et al. Calibration errors on experimental slant total electron content determined with GPS. J Geod, 2007, 81: 111–120
Yuan Y B, Huo X L, Ou J K. Models and methods for precise determination of ionospheric delay using GPS. Prog Nat Sci, 2007, 17: 187–196
Bishop G J, Klobuchar J A. Multipath effects on the determination of absolute ionospheric time delay from GPS signals. Radio Sci, 1985, 20: 388–396
Coco D S, Coker C, Dahlke S R, et al. Variability of GPS satellite differential group delays biases. IEEE Trans Aerosp Electron Syst, 1991 27: 931–938
Manucci A J, Iijima B A, Lindqwister U J, et al. GPS and ionosphere: URSI reviews of Radio Science, Jet Propulsion Laboratory, Pasadena, 1999
Hernández-Pajares M, Juan J M, Sanz J, et al. Improvig the real-time ionopsheric determination from GPS sites at very long distances over the equator. J Geophys Res, 2002, doi: 10.1029/2001JA009203
Schaer S, Beutler G, Mervart L, et al. Global and regional ionosphere models using the GPS double difference phase observable. In: Gendt G, Dick G, eds. Proceedings of the IGS Workshop on Special Topics on New Directions, Potsdam, 1995. 77–92
Wanninger L. Enhancing differential GPS using regional ionospheric error models. J Geod, 1995, 69: 283–291
Wilson B D, Mannucci A J. Instrumental Biases in Ionospheric Measurements derived from GPS data. Proceedings of ION GPS, Salt Lake City, Utah, USA, 1993
Mitchell C N, Spencer P S J. A three-dimensional time-dependent algorithm for ionospheric imaging using GPS. Ann Geophys, 2003, 46: 687–696
Zumberge J F, Heflin M B, Jefferson D C, et al. Precise point positioning for the efficient and robust analysis of GPS data from large networks. J Geophys Res, 1997, 102: 5005–5017
Liu J N, Ye S R. GPS Precise point positioning using undifferenced phase observation (in Chinese). Geomat Inf Sci Wuhan Univ, 2002, 27: 234–240
Zhang X H, Liu J N, Forsberg R. Application of precise point positioning in airborne survey (in Chinese). Geomat Inf Sci Wuhan Univ, 2006, 31: 19–22, 46
Kouba J, Heroux P. GPS precise point positioning using IGS orbit products. GPS Solut, 2001, 5: 12–28
Dow J, Neilan R, Rizos C. The international GNSS service in a changing landscape of global navigation satellite systems. J Geod, 2009, 83: 191–198
Schmid R, Steigenberger P, Gendt G, et al. Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas. J Geod, 2007, 81: 781–798
Sardon E, Zarraoa N. Estimation of total electron-content using GPS data: How stable are the differential satellite and receiver instrumental biases? Radio Sci, 1997, 32: 1899–1910
Gaposchkin E M, Coster A J. GPS L1-L2 bias determination. Lincoln Laboratory Technical Report 971 (MIT), Massachusetts, 1993
Zhang B C, Ou J K, Yuan Y B, et al. Yaw attitude of eclipsing GPS satellites and its impact on solutions from precise point positioning. Chin Sci Bull, 2010, 55: 3687–3693
Camargo P O, Monico J F G, Ferreira L D D. Application of ionospheric corrections in the equatorial region for L1 GPS users. Earth Planets Space, 2000, 52: 1083–1089
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Zhang, B., Ou, J., Yuan, Y. et al. Extraction of line-of-sight ionospheric observables from GPS data using precise point positioning. Sci. China Earth Sci. 55, 1919–1928 (2012). https://doi.org/10.1007/s11430-012-4454-8
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DOI: https://doi.org/10.1007/s11430-012-4454-8