3KOMJATHY A, SPARKS L, MANNUCCI T, et al. An Assessment of the Current WAAS Ionospheric Correction Algorithm in the South American Region [ C ] // Proceedings of ION GPS 2002. Portland City: OR, 2002: 1286-1296.
4COCO D. GPS Satellites of Opportunity for Ionospheric Monitoring[ J]. Innovation, 1991 (10) :47-50.
1Sparks L, Komjathy A, Mannucci A J. Sudden ionospheric delay decorrelation and its impact on the Wide Area Augmentation System (WAAS). Radio Sci., 2004, 39:RS1-13
2Moore T M, Aquino M, Waugh S, Dodson A H, Hill C. Evaluation of the EGNOS ionospheric correction model under scintillation in Northern Europe. In: Proceedings of ION GPS 2002, Portland, Oregon, 2002. 24-27
3Pi X, Mannucci A J, Lindqwister U J, Ho C M. Monitoring of global ionospheric irregularities using the worldwide GPS network. Geophys. Res. Lett., 1997, 24(18): 2283-2286
4Theodore L, Panl M. Simultaneous global positioning system observations of equatorial scintillations and total electron content fluctuations. J. Geophys. Res., 1999, 104(A4):22 553-22 565
5Gwal A K, Smita Dubey, Rashmi Wahi. A study of L- band scintillations at equatorial latitudes. Adv. Space Res., 2004, 34(9):2092-2095
6Basu S, Groves K M, Basu Su, Sultan P J. Specification and forecasting of scintillations in communication/navigation links: current status and future plans. J. Atmos. Solar Terr. Phys., 2002, 64(16):1745-1754
6Rao P, Krishna S G, Niranjan K, et al. Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity period of 2004-2005 [ J ]. Annales Geophysicae, 2006, 24 (12) :3 279 -3 292.
7Ouyang G, Wang J, Wang J L, et al. Analysis on temporal- spatial variations of Australian TEC [ M ]. Springer Berlin Heideberg, 2008.
8Dujanga F M, Mubiru J, Twinamasiko B F, et al. Total elec- tron content variations in equatorial anomaly region [ J ]. Ad- vances in Space Pace Research, 2012,50 ( 4 ) :441 - 449.
9Kumar S ,Singh A K. C, PS derived ionospheric TEC response to geomagnetic storm on 24 August 2005 at Indian low lati- tude stations [ J ]. Advances in Space Research, 2011, 47 (4) :710 -717.
10Bolaji O S, Adeniyi J O, Radicella S M, et al. Variability of total electron content over an equatorial west African station during low solar activity[J]. Radio Science,2012,47( 1 ).