Original Article

Journal of Geodesy

, Volume 83, Issue 3, pp 263-275

First online:

The IGS VTEC maps: a reliable source of ionospheric information since 1998

  • M. Hernández-PajaresAffiliated withgAGE/UPC Mod C3 Campus Nord Email author 
  • , J. M. JuanAffiliated withgAGE/UPC Mod C3 Campus Nord
  • , J. SanzAffiliated withgAGE/UPC Mod C3 Campus Nord
  • , R. OrusAffiliated withPropagation Section, ESTEC/ESA
  • , A. Garcia-RigoAffiliated withgAGE/UPC Mod C3 Campus Nord
  • , J. FeltensAffiliated withESOC/ESA
  • , A. KomjathyAffiliated withJPL/NASA
  • , S. C. SchaerAffiliated withCODE/swisstopo
  • , A. KrankowskiAffiliated withUWM at Olsztyn

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The International GNSS Service (IGS) Working Group on Ionosphere was created in 1998. Since then, the Scientific community behind IGS, in particular CODE, ESA, JPL and UPC, have been continuosly contributing to reliable IGS combined vertical total electron content (VTEC) maps in both rapid and final schedules. The details on how these products are being generated, performance numbers, proposed improvement as far as VTEC evolution trends during near one Solar Cycle, are summarized in this paper. The confirmation of (1) the good performance of the IGS combined VTEC maps, and (2) the characteristic VTEC variability periods, are two main results of this work.


GPS Ionospheric VTEC maps IGS GNSS