Lacy de, María ClaraSanso, FernandoGil, A. J.Rodríguez Caderot, Gracia2023-06-202023-06-2020050039-316910.1007/s11200-005-1626-4https://hdl.handle.net/20.500.14352/50300To estimate ionospheric delays from the Global Positioning System (GPS) measurements, satellite and receiver equipment biases have to be modeled. This paper presents a procedure based on the least squares (LS) approach, which implicitly takes into account these equipment biases in the estimation of the ionospheric effect. The second part of this work deals with the interpolation of the ionospheric correction from a permanent GPS network to a single frequency GPS user. The results obtained show that for 10-cm position accuracy the ionospheric delay can be successfully interpolated when the GPS user is within 40 km of the GPS permanent network.engjournal articlehttp://www.springerlink.com/content/6pxfmg1xhpbyjnt1/fulltext.pdfhttp://www.springerlink.comrestricted access528GPSIonospheric delayPseudorange electronic biasInterpolationGeodesia2504 Geodesia