1. Preface

   • Michael Schmidt

   Preface 10 November 2011 Pages: 885 - 886

2. The ionosphere: effects, GPS modeling and the benefits for space geodetic techniques

   • Manuel Hernández-Pajares
   • J. Miguel Juan
   • Miquel Escudero

   Original Article 11 September 2011 Pages: 887 - 907

3. The international reference ionosphere today and in the future

   • Dieter Bilitza
   • Lee-Anne McKinnell
   • Tim Fuller-Rowell

   Review 10 November 2011 Pages: 909 - 920

4. Validation of international reference ionosphere models using in situ measurements from GRACE K-band ranging system and CHAMP planar Langmuir probe

   • Choon-Ki Lee
   • Shin-Chan Han
   • Jong-Kyun Chung

   Original Article 10 November 2011 Pages: 921 - 929

5. Ground- and space-based GPS data ingestion into the NeQuick model

   • C. Brunini
   • F. Azpilicueta
   • Dagoberto Salazar

   Original Article 10 November 2011 Pages: 931 - 939

6. GPS radio occultation measurements on ionospheric electron density from low Earth orbit

   • L.-C. Tsai
   • Kai-Chien Cheng
   • C. H. Liu

   Original Article 10 November 2011 Pages: 941 - 948

7. Ionospheric electron density observed by FORMOSAT-3/COSMIC over the European region and validated by ionosonde data

   • Andrzej Krankowski
   • Irina Zakharenkova
   • Pawel Wielgosz

   Original Article Open access 18 May 2011 Pages: 949 - 964

8. A new global TEC model for estimating transionospheric radio wave propagation errors

   • N. Jakowski
   • M. M. Hoque
   • C. Mayer

   Original Article 10 November 2011 Pages: 965 - 974

9. Global Ionosphere Maps of VTEC from GNSS, satellite altimetry, and formosat-3/COSMIC data

   • M. M. Alizadeh
   • H. Schuh
   • M. Schmidt

   Original Article 10 November 2011 Pages: 975 - 987

10. Combination of different space-geodetic observations for regional ionosphere modeling

    • Denise Dettmering
    • Michael Schmidt
    • Manuela Seitz

    Original Article 10 November 2011 Pages: 989 - 998

11. IAG Newsletter

    • Gyula Tóth

    IAG Newsletter 28 October 2011 Pages: 999 - 1002